Wednesday, April 11, 2012

Frustration Continues at Chuckwalla

I encountered a string of really bad luck up to and including the weekend of the third S2K Challenge event at Chuckwalla Valley Raceway. I came home from that weekend more frustrated with my car than I thought ever possible. As a result, I haven't driven a single mile since parking it in my garage that Sunday after the event. Where to start...

A few weeks prior to this event, I had a major brake and suspension failure, causing massive damage to the front right side suspension and wheel. I had to replace the entire suspension including both control arms, spindle, brake system and wheel. I managed to find a MY2005 S2000 that was being parted out in Pasadena. Apparently, during the winter storm, a tree fell on the driver side of the car, and the insurance company totaled it out. The front right side was untouched. I had it swapped out at Rising Star Motor.




I ordered a replacement 949Racing wheel from Emilio. Unfortunately, since the wheels are discontinued, there are no more bronze colored 6ULR wheels in existence. I ordered a Tungsten wheel on Monday, expecting to have him ship out the wheel by Tuesday, maybe Wednesday at the latest, and I would be able to pick up my car on Thursday from Rising Star Motor. I also ordered two RS3's from Erik at Discount Tire in Garden Grove on Monday at the same time. Erik shipped the tires same day, and they were sitting at Rising Star on Tuesday. On Wednesday morning, I noticed the wheel still hadn't shipped. I gave Emilio a call and stressed the importance of shipping the wheel on time. He promised he would ship it out that afternoon. On Thursday, I realized that he still had not shipped the wheel from his shop in Lake Forest.

Aside: You see, I am a medical student. Time is never on my side. Especially so when I am doing a medicine sub-internship in Las Vegas, about 300 miles away from Los Angeles. Especially so when I only get one day off a week to take care of all my errands, like picking up my badly damaged car and celebrating my brother's birthday all in California. So I asked my medicine team for Thursday off. I was expecting to drive from Las Vegas to Rising Star Motor in Las Tunas, to pick up my car that would be already all fixed up for me. Thanks to Emilio, I now had to drive from Las Vegas to Lake Forest to personally pick up the wheels, then drive to Las Tunas adding about a hundred extra miles to my trip, a few extra hours of my sleep deprived time, and a ton of frustration. Note: if you ever need something in a hurry, don't expect timeliness out of 949Racing. Seems they're more interested in making their orange Miatas go fast than keeping their customers happy.

By this point, I was running late. I personally delivered the wheel to Ryan at Rising Star, and he mounted and balanced the two RS3's. I had a quick and dirty alignment done by A1 Automotive Service next door. I was in a hurry to make it to my brother's birthday dinner, so I just asked them to center the steering wheel and get the car to just drive straight. I already had an appointment with West End for a full alignment and cornerbalance in a couple weeks, so no need for perfection here.

The lowered ride height of the coilovers upsets the suspension geometry, specifically the roll center, so I bought a pair of J's rear roll center adjusters as well as the J's L2 spacer to use with my S2 camber joints. I ordered these from N1 Concepts (who are apparently the only authorized North American retailer of J's Racing products). I placed the order a full 3 weeks ahead of the event, and was promised that the items would ship out in 2 business days, and I should have them in my possession in 5-7 business days. Seven business days later, I suddenly had a hard time getting in touch with N1 Concepts. They wouldn't answer their phone, respond to e-mails, nothing. I received a call from N1 Concepts the Wednesdsay before Chuckwalla saying that they somehow lost track of my order and the items finally shipped that morning from Japan and I should have it sometime the following week. That pretty much ruined my plans to have these installed along with my alignment and cornerbalance with West End that Friday.

Around the same time I ordered the J's Racing RCAs, I also ordered Carbotech XP12's for the front from RickS2K.com. They also e-mailed me on Thursday saying they lost track of my order, and they were shipping the pads that day. I had to beg a friend to let me use what was left of his old front XP12's. What is it with these racing shops and pure shitty customer service?

Friday at West End, Darrin was very friendly and professional. It was very refreshing, for a change. He pointed out some things that needed attention. The most alarming of which was the front right suspension. Turns out I had zero caster out of the front right wheel (versus 6.5 degrees of caster in the front left wheel), the cause of which was a bent lower control arm. The very control arm I purchased off the MY2005 S2000 that was being parted out. The seller assured me that there was never any damage to that side of the car, and the car had no problems with alignment. Darrin played around with the subframe and got me a whopping 2 degrees of caster in the right at the cost of some caster lost from the left. Additionally, because of the bent control arm, there was decreased clearance from the sway bar, causing the endlink to bind at times. This is probably when I should have thrown in the towel and decided not to go to Chuckwalla until I got these issues sorted out.

I then drove to Gavrielli Plastics in North Hollywood to pick up large sheets of alumalite to make my splitter. The smallest they sell is a 4x8' panel that you can cut for $5 per cut. I had them make two cuts to give me a 22.5"x67" panel for the splitter, and give me the spare pieces. I quickly realized that there was no way these panels were going to fit in the S2000 in any safe way. Left with no option, I drove with one hand while the other hand held down the huge panels sticking out of my car from North Hollywood to my apartment in Loma Linda. I spent all night and all morning with about 2 hours of sleep working on the splitter, finally getting it all together by around 11 am on Saturday. I drove to Chuckwalla and made it in time for the last two sessions of the day.




After my first session, I noticed a bunch of oil seeping out of my left side marker. I opened the hood to realize that the oil cap had worked itself out and had disappeared, pouring hot oil all over the engine bay. (While I was getting the suspension repaired at Rising Star Motor, I asked them to change all my oils. I never touched the oil cap.) Andrew M. was keeping his S2000 at Chuckwalla overnight and was nice enough to lend me his oil cap. Mike bought me an oil cap from Autozone on his way out that evening.


On Sunday morning, I was struggling with a lot of low speed understeer. I ended my first session with a 2:02.092. After my first session, I decided to install my Shorai lightweight battery that I brought with me. For some reason, I managed the reverse the ends of the battery, and connected the battery the wrong way. That shorted out the main 100A battery fuse in the car, again taking the car out of action. Aaron Bitterman was nice enough to lend me his Evo XIII to drive an hour back to Indio to look for a replacement fuse, which I found at Napa Auto Parts. I came back in time for my third session. By that point, the track was already much hotter and greasier. I tried to dial out the understeer by flatting out the rear wing, but that just caused unpredictable high speed handling. Whatever handling faults I struggled with earlier was only worse with less grip. I managed a 2:02.399 in the third session.

The fourth session was even worse, and I couldn't improve on my time. I came back to check on the oil catch can. I left the hood up using the OEM hood prop. The carbon fiber hood has a hole for the hood prop that is too small. A gust of wind blew the hood prop off the hood, and the hood fell down, breaking the hook for the latch on the underside of the hood. Unfortunately, I did not have the time to install the Aerocatch hood pins, so now there was nothing holding the hood down. I managed to secure it using heavy duty duct tape. Seething in frustration and amazed at my bad luck, I decided to call it quits and just take pictures of cars flying by the front straight. I was taking pictures with my Canon 5D and 70-300 IS lens, when all of a sudden the viewfinder went black. I opened the camera and saw that the mirror had fallen off the frame. I was speechless at how many things went wrong that weekend.


At the end of the day, I ended up in fourth place, missing the podium for the first time in 3 years of competing in the S2K Challenge.

A lot of work needs to be done to get my car to where it needs to be. Another visit to West End, this time with the J's Racing parts and the brand new lower control arm will alleviate some of these handling issues. I plan to refine the front aerodynamic package and install a softer front sway bar, all of which should help increase the front grip of the car. I am planning on going to Buttonwillow on April 20 for an Open Test Day. Hopefully I will be able to fine tune the shocks of the car without the pressures of competition and limited track time. It'll be just me and the car (and Mike K. who will help me with the shock tuning). I am actually glad that there is an almost 2-month hiatus after this Chuckwalla event. I need it.

Monday, March 12, 2012

2012 S2K Challenge

It's been a long time since I've posted here. For those of you not in the know, let me bring you up to speed to 2012.

Since I left off, I kept improving my driving technique and started to win more events. Emilio, the then-class leader, made the switch to Modified Class midway though the season. I ultimately won the 2009 S2K Challenge Street Class Championship. Click here for the writeup. I repeated the performance in 2010. And again in 2011. In 2010, I used a non-staggered street tire setup and ran the majority of the season under points at 3.25 out the 4 points allowed. In 2011, we allowed NT01 to be used in Street Class, and I ran a very basic non-staggered NT01 setup with a wing and test pipe (with OEM exhaust).

Here are my personal best lap times using the Street Class setup:

Willow Springs International Raceway - 1:34.688 - February 20, 2010
- 17x9 RE030
- 255/40R17 Dunlop Z1 Star Spec
- APR GTC-200 Wing
- T1R 70RT Titanium Exhaust
- Video

Buttonwillow Raceway 13CW - 2:01.057 - October 23, 2010
- 17x8.5 BBS RGR
- 255/40R17 Hankook RS3
- APR GTC-200
- J's 70RR Wing

Chuckwalla Valley Raceway - 2:03.082 - June 5, 2011
- 17x9 949Racing 6ULR
- 255/40R17 Nitto NT01
- APR GTC-200
- Test Pipe (with OEM exhaust)

Mazda Raceway at Laguna Seca - 1:43.530 - June 24, 2011
- 17x9 949Racing 6ULR
- 255/40R17 Nitto NT01
- APR GTC-200
- Test Pipe (with OEM exhaust)
- Video

After winning the Street Class Championship three times in a row, driving on essentially the same exact setup, I got a bit stir crazy. I decided to mix things up a bit and take the plunge into Modified Class. I bought a set of Evasive-Spec TEIN SRC's, Voltex Type-4 Wing, and a big splitter, among other things. It would be an understatement to say that there is a bit of a learning curve. So far, I have been struggling to find my pace around the track. I have barely managed to stay on the podium these last two events, placing 3rd at Buttonwillow Raceway 13CW with a 1:59.511 and 3rd at Auto Club Speedway Roval with a 1:54.856. It doesn't help that my car still isn't quite set up properly. I have yet to get a proper cornerbalance and alignment, and my car is still under points at 5.5 points out of the possible 6.5 (both Mike and Chris are at 6.5 points).

Here is a video from the first 2012 S2K Challenge Event at Buttonwillow Raceway 13CW:



The next event will be at Chuckwalla Valley Raceway, my new favorite Southern California track. I plan on going there on Saturday for practice, then on Sunday for the Time Trial. I plan on also putting on a few more go-fast parts to get me up to speed with the top-runners, Mike Tsay and Chris Elders.

Below is a complete modification list that I plan to have completed in time for Chuckwalla:

AERODYNAMICS
Custom 3" Alumalite Splitter with Wheel Spats
APR Front Bumper
Seibon Mugen-Style Carbon Fiber Hood with Aerocatch Pins
Voltex Type-4 Wing

WHEEL AND TIRES
Hankook RS3 Tires 255/40R17
949Racing 6ULR Wheels 17x9 +48

POWER AND ENGINE
AUT Carbon Fiber Cooling Plate
J's 70RR Titanium Headerback Exhaust
Greddy Oil Catch Can

SUSPENSION
Evasive-Spec TEIN SRC Coilovers
J's L2 Front Roll Center Adjuster and Camber Joint
J's Rear Roll Center Adjuster
J's Rear Bumpsteer Kit
MY00-01 Front Stabilizer Bar
Custom McMaster-Carr Adjustable Endlinks

BRAKES
Carbotech XP12 Front / XP10 Rear Brake Pads
Endless Swivel Steel Type Brake Lines
Front Brake Ducts

INTERIOR
Recaro SPG Bucket Seat with Taitec Rails
Racepak G2X Datalogger

WEIGHT REDUCTION
Izze-Engineering Air Pump Delete
Shorai LiFePO4 Battery

FLUIDS
Engine: Eneos 5W30 Synthetic
Transmission: Honda MTF
Differential: Motul Gear 300
Brakes: Motul RBF660

ALIGNMENT AND CORNERBALANCE
Front Camber: -3.2
Front Caster: 6.45
Front Toe: 0
Rear Camber: -3.4
Rear Toe: 1/16 Total

Chris is planning on running on NT01 at Chuckwalla, as he did at ACS. I think it is a smart move, as his performance margin will only increase if the track heats up as we get closer to summer. Plus, he is using the under-penalized Voltex 1S wing, which will provide him with more than enough downforce for the long sweepers. I can only hope that the track temps will stay below 80F to minimize the performance advantage of the NT01.

Mike is fast as always. This will be his fourth year running with essentially the same setup, which has slowly yet steadily evolved and developed into the finely tuned racing machine it is today. To boot, he is now running a 2.2L AP2 motor that gave him a solid 5 mph advantage down the front straight at ACS. I am not sure how I will beat him.

These next couple of weeks should be interesting.

In other news, I matched into a Neurosurgical Residency program today. I'll have to wait until Friday to find out exactly where I matched, but I am definitely hoping to stay in California, where the sun is always shining and the tracks are always open. :)

Friday, August 14, 2009

Budget Woes at Buttonwillow

On Tuesday, I spent an entire day replacing almost every single bolt and nut and pin that I touch whenever I do a brake job, and replaced my Goodridge Stainless Steel Brake Hoses (junk, IMO) with those made by Endless. On Thursday before the S2000 Challenge Event, I drove to Evasive to get the J's S2 Camber Joint installed in the front, relocate the SPC Camber Kit to the rear, then get it aligned with more aggressive specs. I also learned that if you rotate the top washer 90-degrees, then the SPC camber joint is fixed in place and it won't slide around whenever I spin or go over harsh bumps. I was hoping for the following alignment specs:

Front Camber: -3.3
Front Caster: 6.5 degrees
Front Toe: 0
Rear Camber: -3.0
Rear Toe: 1/8" Total

It turns out that the J's S2 has just enough offset to give me the -3.3 camber, but not enough to give me the caster that I want. Also, since the top washer of the SPC camber joint was rotated 90-degrees, it was fixed in place and gave me a large amount of extra negative camber. We couldn't get any less negative than -3.15 degrees. So my final alignment specs were:

Front Camber: -3.3
Front Caster: 5.2 degrees
Front Toe: 0
Rear Camber: -3.15
Rear Toe: 1/8" Total

Even driving home, I was able to appreciate what a huge impact caster has on the steering feel. I remember when I first drove an S2000 and commenting on how numb the steering felt compared to my 2000 Honda Prelude. When I realigned my S2000 with 6.45 degrees of caster, the steering felt much better. Now, at 5.2 degrees, I was back to that bland, numb steering. I figured, at least what I lose in steering feedback I gain in ultimate grip. Turns out I was wrong...

Before I left Evasive, I also picked up a Greddy Oil Catch Can since I was getting huge blow-by at Lost Hill at Buttonwillow and the Bowl at Streets of Willow. All told, I spent about $350 for the J's S2, $100 for the Catch Can, $250 for the labor. So while JDM goodies make me feel warm and fuzzy inside, it also makes my wallet significantly lighter. So light that I was forced to roll the dice on my tires that had long ago become full slicks. I also forced Kragen to resurface my rotors that had heat cracks in them because I didn't want to pay for new rotors. Turns out I was also wrong...

A record 28 S2000's showed up for the Challenge!

My first session out, I took it real easy because I wanted to bed in the pads on the freshly resurfaced rotors. I didn't really push the car much, but I knew the handling had changed and I'd have to relearn the car again. My second session out, I took Ben (a new S2KC competitor) out with me to show him the lines. This is when I started to explore the limits of the S2000.

New alignment specs make the car very, very loose

It turns out that the new alignment specs finally made the fronts grip like they're supposed to, and the car had insane turn-in. Unfortunately, mid-corner and corner-exit balance was much more toward oversteer than I was used to, so I spent almost half a session sliding all over the place. When I pit in mid-session to check out the car, Ben promptly took that opportunity to get the hell out of this quirky-handling car. After a couple more laps, I got much more used to the handling balance and clocked in a respectable time of 2:05.949, which was a full second faster than I had ever done before, on tires that were nearing death. Except I forgot to put in my CF card in the G2X unit, so I didn't get any data on that lap. Doh!

My third session, I started to feel the grip of the rear tires really take a dive. I did a huge drift through Riverside at 90+mph, so after a cool-down lap, I pitted in early to take a look at the tires.

Such a fine line between grip and no grip...

After I took a look at those tires, my heart sank. I knew I should have gotten new tires before this event! That's what I get for trying to budget expenses. I figured this was the end of my day, and that I wouldn't be able to compete in the S2000 Challenge Time Attack. I was moping around, until Si mentioned that he saw a pair of 255/40R17 NT01s lying around that probably belonged to Aaron Bitterman. It turns out Aaron gets those NT01s for advertising Nitto tires at each SpeedVentures event (obviously it worked on me). Magnanimously, he agreed to let me borrow these tires for the day. I skipped (figuratively--these tires are heavy after all) to the tire shop to have the rear tires mounted.

Buttonwillow Tire Shop to the Rescue!

At this point, two of my friends Javi and Shawn showed up. They're both S2000 fans and needed a bit of convincing to finally go out and buy an S2000 and take it to the track where it belongs. In my fourth session, I took Javi and Shawn out as passenger but found that something had changed. The alignment was off and now that I had new rear tires and bald front tires, the car was an understeer pig. It literally blew my mind what a difference there is between old and new NT01s. (There is truth to the statement that old NT01s are like good street tires.) The car understeered so heavily, I had to frequently lift off the throttle to get the car to turn, losing so much speed. Despite having more grip in the rear, I was now so much slower because the balance just wasn't there.

After my fourth session, I decided to crank the wing angle all the way up. That way I could minimize the downforce in the rear, and the car would rotate better. I set it at +1.5 degrees (that is, front of the wing higher than the rear of the wing), but on a surface that made the car roll forward, so I'd say it was closer to +5 or more. I took it out as is during my fifth and final session before the time attack. This should do the trick, and I should be able to go faster. Turns out I was wrong...

Actually, the effect of the rear wing doesn't really make much of a difference in the slower corners like Cotton Corners, Grape Vine and Sunset, where I was understeering the most. It definitely did help a little, to the point where I was able to manage the understeer by trail braking or using abrupt steering inputs to upset the car. At the same time, reducing the rear wing angle made the car really floaty at high speeds such as Riverside. So I had low-speed understeer and high-speed oversteer, which is actually the reverse of what I prefer. (I like to set up the car for slight oversteer then get the wing to balance it out.) The best I could do that session was a 2:08, 3 whole seconds off my pace earlier when all four tires were dying. I was out of ideas, so I left it as is for the Time Attack.

William in an AP2 with nearly the same setup as mine (225/255 NT01, Front Aero, Rear Wing) had been running low 2:05's all day. I figured he had won this time. Either way, I would give it my best shot. I suppose it was the pressure of Time Attack, but magically I was able to produce a 2:06.5 during my second lap. It was good enough to beat William, but not enough to beat Emilio (who drove William's car to a stunning 2:04.5--with a mis-shift that cost him 0.6s) and a new competitor, Eddie, whom I'd never heard of until the Time Attack (who drove a 2:05.7). As Emilio is a sponsor and isn't allowed to collect prizes, Eddie took both the 1st place prize for Street Class (a free alignment from West End) as well as the prize for PAX (a vacuum cleaner worth $600).

At the end of the day, Fil kindly reminded me that if I had just gone and bought new tires like he said, I would probably have beaten Eddie and won the vacuum cleaner. Ironically, the value of the vacuum cleaner was almost exactly the cost of a new set of tires. Doh! That vacuum cleaner would've hit E-bay so fast!

After the race, Emilio had commented what a huge difference a bumpsteer kit makes on AP1s. After some more discussion, I decided to take the plunge on a new J's Bumpsteer Kit. I'll have to install this, and then get a new alignment (Doh!). So next time, I'll have a fresh set of NT01s, new XP12 front pads, new rotors (the front rotors finally cracked all the way through--yikes!), J's Bumpsteer Kit, and a new alignment. I really didn't like how numb the steering feels, so I think I will reduce the front camber and try to get back some caster (to at least 6 degrees). If Emilio can do a theoretical 2:03.9, I will be looking for low 2:04s. Scary to think that Emilio's own car is faster, still! One day--I'll catch up to you, Minamoto!

Things I need to do better at Buttonwillow:
  1. Sunset: be more aggressive with the throttle at corner exit
  2. Club Corner: don't lift, the car will stick (I think...)
  3. Left Turn into Bus-Stop: transition faster (BSK should help here)
  4. Riverside: turn in later, try to get as much exit speed while sticking to the right
  5. Left Turn into Lost Hill: don't lift, the car will stick (depends on how well I do #4)
  6. Sweeper: watch out for that fresh patch of pavement--it's got less grip so don't be as aggressive with the throttle on corner exit or take a wider line
  7. Sunset: late brake and turn in a tad later to favor exit speed
  8. Be more aggressive with the brakes overall (new XP12s should help here)
  9. Stop granny shifting! (William made fun of me for this...)
Till next time...

Tuesday, July 21, 2009

JDM makes me feel warm and fuzzy inside...

Just in from Japan: J's Racing S2 Camber Joint! Unfortunately, J's Racing does not make one for the rear, so I'll be using the SPC Camber Joint for the rear.

Even the box makes me happy!

J's S2 Camber Joint: maximize camber for OEM suspension

For comparison: J's on left, SPC on right.

Endless Brake Hoses to complete the JDM touch

Wednesday, July 8, 2009

How to mount a G2X display

GPS dataloggers like the G2X and Traqmate are becoming more and more popular among the weekend racers, taking self improvement to a whole new level. Unfortunately, none of these devices come with a convenient mounting option. I found a simple solution, and now I pass it on to you.

I found a universal GPS window mount kit made by Bracketron at Best Buy. It comes with several different mounting options, but one of those options is a flat plate that can then be screwed onto the back of GPS displays. I wouldn't try to screw anything onto the back of the G2X display, so I decided to use heavy-duty double-sided tape instead.

Front Packaging

Rear Packaging

Kit Contents

Heavy-duty double-sided tape from Home Depot

Peel off the red cover, attach to G2X display

Allow the tape to adhere to both sides overnight before mounting

View from the cockpit

Cheers!

Wednesday, July 1, 2009

S2000 Challenge Hat Trick... Sorta

S2000 Challenge Series - Event #6 - Streets of Willow
The next event in the S2000 Challenge Series was at Streets of Willow Springs (SOWS) on May 10, 2009. I finally got my CR lip installed, but didn't have time to install the MY2008 front spring. This was the weekend right before year-end finals, so I had a bit of guilt going to this event and not spending the weekend studying.

Grabbing some lunch at Fosters with S2ki buddies

This was my third time at SOWS, and my second time doing the clockwise (CW) configuration. Last time I was here, I was on old, tore up RE-01R street tires and APR GTC-200 wing. It was also much cooler, with some scattered showers, and I was able to manage a best laptime of 1:30.596. This time, I returned with Nitto NT01 race tires, Project Kics 10mm spacer, and CR front lip. I was hoping to break into the low-1:29 mark or even into 1:28s.

Hmm, do you think a wing is an important element in a fast S2000?

Unfortunately, because of the heat, everyone was running way off pace--by almost 2 or 3 seconds. No matter how hard I tried, I couldn't break into the 1:30s. By the end of the day, right before the Time Attack, I was a bit disappointed to learn that William and Joel (Street Class competitors) had both broken into the 1:29s, leaving me gridded third. Fil, with a best laptime of 1:32.279 was gridded fourth.

Fil and I are gridded side-by-side on the second row

During the break before the Time Attack, I overheard Emilio and William discuss the proper line for turn 3, a tricky off-camber turn that sets up for an uphill charge to turn 4 and the esses. I had been braking in a straight line, late-apexing turn 3, to set up for turn 4. According to their datalogger, it turns out it is much better to trail brake into turn 3, use the oversteer to carry more momentum into turn 4. I decided to try this on my Time Attack run.

As I was putting on my helmet for the Time Attack, Sarang came up to me, looked me dead in the eye, and said: "win." Whenever I am put in a pressure situation, I tend to focus just a little bit better, my senses are heightened, my reflexes quickened. Not only was this the Time Attack, but Sarang demanded the win. I drove the car as fast as I could, and as I finished my first lap, my G2X displayed: 1:29.486. I was able to drop over half a second from my best lap all day, and I knew it was good enough for the win. I ended up taking first, William took 2nd with a 1:29.707, and Joel took 3rd with a 1:30.106. Emilio had run in Modified Class this time, so with this win I was the new Street Class points leader... at least for the time being.

Points leaders as of Event #6
Nam Yoon 34
Emilo Cervantes 30
Joel Perez 18
Dino Antonov 16
Dustin Dessero 14
Paul Asterline 10
Filip Craciun 9
Charles Ng 8
Tom Liang 8
Mike Skowron 8
William Chen 8

S2000 Challenge Series - Event #7 - Willow Springs International
Over a month and a half later, on June 27, we were back in Rosamond, this time on the Big Track--the track that separates the men from the boys. Willow Springs International Raceway is a 2.5-mile course with only nine turns. Some of these turns are pretty heavily banked, and the last turn (Turn 9) has been labeled, "the most dangerous corner in motorsports." Even street cars will routinely see sustained lateral G-forces of over 1.0G, and in my car with NT01, I was seeing over 1.5Gs according to the G2X accelerometer. Coming out of Turn 5, drivers are usually full-throttle all the way until the braking zone for Turn 9. I was taking Turn 8 full-throttle, going 118mph and pulling over 1G and counter-steering to keep the car from sliding out of control!

View of Willow Springs Raceway from the 14-Fwy

Since I had a retreat to go to this weekend, I left for Rosamond from Big Bear Lake. I drove down the mountain in a hurry, drove through Apple Valley and cut across using local streets to 14N. It was a grueling 3+ hour drive, and I finally made it in time for a few sessions. Aaron was kind enough to give me all three wristbands (basically I could go out and come in as I please). I worked my up to speed slowly, and during my first session out, the best I could do was a 1:43.311, which was slower than the last time I was here on a bone-stock S2000 on old S-02 street tires. People looked at my times and reassured me: "it's really hot out there, people are running 2-3 seconds slower." I appreciated the comment, though I knew that was an exaggeration.

Budweiser Balcony at Willow Springs

Next session out, I dropped almost 3 seconds and managed a 1:40.885. Better, but definitely nowhere near what I'd need to be competitive. I drank some water, went out again and dropped another second to 1:39.442. I cut that run group short because of all the traffic, and went out in the last Red run group. Free of traffic, I finally figured out the flow of things. I got 3 laps in the 1:39.2, but I really wanted to break into at least 1:38 (I initially was hoping for high 1:36, but that was contingent on me being there for a whole day). I took Sarang out during the last White group serssion during the driver's meeting, and went straight from the track to grid. I was hoping to be in the 2nd group, but I was gridded last in the 1st group.

Ed and Mark battling it out down the front straight

During the Time Attack, I decided to push my luck just a little bit. I charged down the front straight and planned to do some late-braking. Except because I had just gone out in the previous run group, and sat baking in grid without a cool-down lap, my brakes were faded. I had no choice but to turn in almost 5mph faster. My rear slid out, and I had to drift my way through Turn 1, scrubbing off a ton of speed. I lost exactly 0.425 seconds during Turn 1, and lost another .293 seconds down the straight that connects to Turn 2, for a total of 0.718 seconds! The rest of the lap I drove pretty well, but managed a 1:38.543. The second lap, I was doing quite well, except my tires started to get hot. I started to slide through Turn 4 and almost lost it in Turn 5, scrubbing off a ton of time. My second hot lap came out to 1:38.408.

G2X Datalogger Plots: 1st lap (yellow); 2nd lap (magenta)

Looking back on the G2X Datalogger, if I didn't have brake fade in Turn 1, I could have been 0.718 seconds faster in my first hot lap, for a laptime of 1:37.825, and if my tires hadn't gotten greasy in my second hot lap, I could have pulled a laptiome of 1:37.252. Sure, there are a lot of if-only's in that equation, but I'm fairly confident that if I had a bit more time to practice, I could have broken into the 1:36s like I had originally hoped. We will return to Willow Springs International for the penultimate S2000 Challenge Event in October. Hopefully the weather will be a bit cooler, and I will be able to achieve my 1:36 or better.

The next two events will be at Buttonwillow Raceway. I plan to finally install my MY2008-2009 front springs in time for the Buttonwillow Open Test Day in July 11. Depending on what my low-speed handling characteristics are like, I might even install a thicker front sway bar from MY2000-2001. My goal is to get low-speed handling to match my high-speed handling (which I can tune using the rear wing angle). I will also try to install the SPC Camber Kit in the rear to allow more camber, and re-align using less rear toe-in. My goal for Buttonwillow is high 2:04 or low 2:05 to win PAX and a nifty $800 vacuum cleaner. That should please the missus...

Thursday, May 7, 2009

S2000 Gets a Facelift

Since the APR GTC-200 wing is so amazingly effective at high speeds, producing high-speed understeer, I have been lusting after Fil's CR lip. This would hopefully improve front aerodynamics, improve high-speed balance, and ultimately cornering speeds and lap times. The process I went through to obtain this CR lip was quite circuitous.

The CR lip does not work on an AP1 front bumper. So I had to find an AP2 bumper, preferably in Grand Prix White (because I hate dealing with body shops and non-original paint). So after scouring the S2Ki pages for weeks, I found one... sorta. This guy was selling his GPW front bumper with OEM lip for $550. Except I didn't want the OEM lip. After another week or two going back and forth with him, I finally decided to pick up the bumper and lip for $500... from San Diego. Seven hours, $500, and 5 California Burritos later, I had my bumper back at home.

I quickly found a buyer for the OEM lip, and in a few days he came to pick it up for $250. Excellent, as now net cost to me for the front bumper is $250. I ordered my CR lip and all the hardware from Majestic Honda, except they waited till the last minute to tell me that the CR lip was oversize, and they couldn't ship it at all. But they were gracious enough to ship out all the hardware for the lip they could no longer give me. Amazing customer service! Luckily, I found a place in Oxnard, CA selling a brand new GPW CR lip for $365 (almost $40 cheaper than Majestic Honda). Net cost for CR lip and all the hardware: right about $410.

Now, my theory is that the CR lip produces so much downforce, that it needs eight more bolts that must be drilled through the front of the bumper to hold it securely in place. Except this AP2 bumper (off a MY2004) didn't have these holes, obviously. I tried my best to dry fit the lip on, and using this MacGyver technique. That is, I placed a bit of chewing gum inside the nut of the CR lip then pressed it against the bumper so it would leave a small saliva imprint exactly where the holes should be drilled. It took me about two hours to drill 7 of 9 holes. Then as I was taking a break, I noticed that on the backside of the bumper, there are small, slight X-shaped depressions in the bumper that corresponded perfectly to where the holes should be drilled. Drilling the next two holes took 15 seconds. Gahhhhh! OMGWTFBBQ!!!

AS AN ASIDE: Who the hell would think that a bumper made in 2004 would have markings for a lip that wouldn't become available until 2008 (as the CR in USA and the Type-S in Japan)? Is this some sort of time-warp? Was Honda really developing the CR at the same time they were revising the AP1 to AP2? Why the hell did they wait four years to release it if they were so sure they were going to make these products that they made X's on the back of the bumper so that we could install it more easily? W...T...F?!?! Actually, it turns out that yes, Honda was developing the "CR" back in 2003. It was called the Modulo Concept (no, not the 2009 Modulo Concept that looks fubar, but the 2004 Modulo Concept). My guess is that the Modulo Concept was planned as Dealer Accessory Parts, sort of like what happened with the TSX. But they decided to sit on it for a few years and eventually just release it as the CR/Type-S.

Then as I was surfing the web looking for DIY/writeups on installing the AP2 bumper, I realized that the AP2 bumper won't fit on an AP1 because the bumper beam is different. Gah, so I'll have to buy an AP2 bumper beam. So I looked up some dealer prices on the bumper beam. The bumper beam itself is $166.52 and the little foam piece that sits on top of it is $53.52, for a total cost of $220.04. What the hell? This little bumper beam costs almost as much as the bumper itself? Are you kidding me?

I guess I could just remove the bumper beam and hope that I don't run into anything (as without the bumper beam the front bumper would disintegrate on impact and transmit all the forces from impact straight into my engine bay). Then, I looked through several different S2000 part-outs. One good thing about the S2000 being so tail-happy is that people crash them quite frequently doing their cAnYoN rUnZ and dRaG RaCeZ. All I had to do is find one that crashed rear-end first and try to acquire the bumper beam. Turns out, there was a black 2004 S2000 being parted out from a rear-end collision. Best of all, his car was in San Bernadino, 15 minutes from my place. The guy obviously didn't know much about how much things are worth:

Me: So how much do you want for the bumper beam?
Him: I don't know. What is that?
Me: [Points to it] That metal piece.
Him: Hmm... how about $30?
Me: [Almost stupefied] Deal!

I paid that man as fast as I humanly could and ran off with the bumper beam and foam.

AP1 (White) vs. AP2 (Black)

The foam piece and corners are slightly different

I had to do a few more MacGyver tricks to get the bumper and beam off, install the new bumper beam and bumper with lip.


In the end:



Turns out the splash shields are slightly different between AP1 and AP2, such that the bolts that fasten the under tray and splash shields to the bumper don't line up correctly. I was only about to get 2 of 9 bolts. I'll have to visit Home Depot and either get nuts that fit the Honda bolts (as the original bolts are attached to the splash shield), or get a new set of bolts and matching nuts. It will be interesting to see how this lip actually performs.