Archive for April, 2008

Enter the Trans Am WS-6

Saturday, April 12th, 2008

2001 WS6--1968 Camaro Stand-In

As you recall from earlier blogs in addition to the 1968 Camaro I raced the 1998 Z-28 convertible during my first SCCA outing but I had been wanting a fourth generation WS-6 for some time, and one came up on Craig’s List for sale at the right price.  The only problem was the car was on the Big Island of Hawaii, and I live on O’ahu.  After talking it over with my sainted wife Cris, we decided to fly over to the Big Island and check the car out for the day.  We used miles to fly over in the morning on Hawaiian Airlines and return the same evening.  Dad was here to stay with the girls for the day so it cost nothing out of pocket, and Cris loves visiting the Big Island.  To make a long story short, we bought the WS-6 and sold my Z-28.  In the process I stepped up to a higher class car (the WS-6 is, performance-wise and options-wise, on par with the SS, while the Z-28 is one step lower) as well as a 3 year newer car.  The WS-6 has the 6 speed T-56 transmission with the optional Hurst shifter and a 3.42:1 rear gear with an Auburn limited slip differential.  Additionally the WS-6 has sharper styling and leather interior, and was black on black, all of which I preferred.  The last and best part was the fellow I purchased the Trans Am from had tastefully modified the car with the addition of SLP resonators and stainless steel exhaust, less restrictive air filters for the Ram Air, an SLP smooth bellows, a shock tower brace, and American Torque-Thrust wheels at all four corners sporting 275 rubber in the front and 315 steamrollers out back.  He also had installed a sub-woofer to go with the 8 speaker surround system and a couple of amps controlled by a nice Alpine head unit that has the i-pod interface built in.

Black leather in the WS-6 is hot

Preparing the Trans Am for autocrossing wasn’t that difficult.  I had checked it out before purchase, giving it my own tech inspection.  Mostly I just had to remove anything that was loose in the car.  One of the amps was laying on the back deck without being secured, so I secured it with some Velcro and was good to go.  I wasn’t sure how the car would handle relative to the ’68 Camaro.  If driving the ’98 convertible Z-28 was any indication it would be a lot softer in terms of the shocks.  I did expect it to be a bit tighter than the Z-28 as the WS-6 suspension is supposed to be a higher performance suspension.  I was also keen to see how the big meaty tires would fare on the race track.  Being a stick car, I knew that I’d be able to put the torque down a lot more directly than with the automatic-equipped Z-28, so it would take more finesse to handle the WS-6.  It wasn’t the Camaro I’d be making my debut in the CP class in, but at least I did have a very nice back-up until I got the bent valvestem in the Camaro fixed…

2001 WS6 engine bay...slightly modified

Full Roller Rockers and Bent Valvestems for the Camaro

Friday, April 11th, 2008

 

I decided to install my full roller chromemoly steel 1.6 to 1 rockers from Comp Cams (PN 1302-16) in the ’68 Camaro before the next SCCA race day.  I pulled the valve covers and took out the Pro-Magnum roller tip 1.52:1 rockers that were in place and installed a pair of the new full roller rockers and turned the motor over by hand.  I was a little worried that I would have more lift than the springs on the heads could handle but I had plenty of room with no coil bind so went ahead installing the rest of the rockers.  I finished with cylinder #8 on the passenger side firewall and decided to fire the engine up.  Always turn the motor over several times by hand after changing the rocker arms out!  When I installed the rocker arm on the #8 cylinder I put the pushrod in wrong and it was hanging up on the edge of the lifter…when I turned the engine over it tried to run but the exhaust valvestem on the #8 cylinder was bent on the first revolution and was interfering with the top of the piston on each subsequent revolution.  The sound of the engine trying to run but not able to get up and idle was a sad one.  After some inspection and observation of what had happened came the realization that I would not be racing the Camaro in the next SCCA autocross because I was only 2 days from race day and there was no way I was going to pull the head, have it repaired and replaced within that time span.  This rookie mistake on my part born out of trying to get the job done in a hurry during the waning hours of the evening was going to cost me a race day in the Camaro.

Daily Driver

This was particularly sad because there is a season long points race in our club for Solo II racers in each class.  I had figured out after an overdue review of the class rules that the Camaro didn’t belong in E Stock Prepared (ESP) but rather in C Prepared (CP) and because of this would already be out points in CP because I raced ESP for the first race of the new season on March 30th.  I didn’t want to not accumulate any points toward the season-long competition during the second race either.  So I did what any aspiring autocrosser would do:  I started preparing my daily driver for race duty on Sunday.  Luckily, my daily driver is a 2001 Trans Am WS-6 that has been modified a bit for peppy acceleration. 


SCCA Solo II Classes for the Camaro

Tuesday, April 8th, 2008

As I mentioned before, the rule book for SCCA is thick and, for a beginner, daunting. For my first race, after spending some time trying to decipher from the PDF rulebook what class the 1968 Camaro should be in, I decided to just show up and let the friendly people at the SCCA tent tell me what class I would be in. It turns out they don’t see too many early domestic cars at our particular club (only about 10 percent of the cars on any given race day are domestic; of these, most were born in the last 10 years) and they weren’t sure what to do with me and my Camaro. After they spent some time pouring over the same rulebook I had struggled with, they decided to put me in the generic class for altered domestic cars that are still generally street-driven: E Street Prepared, or ESP. This was fine by me, and I appreciated their putting me in a class as it was farther than I got in the task. I competed mostly against other domestics in ESP for my first three races, which I liked; there were opportunities to face other f-bodies as well as mustangs.
However, upon some time familiarizing myself with the cars I saw in my first three races, talking to some of my fellow competitors, and some further research on the internet, I determined my car was no longer legal in ESP due to the extensive modifications I had made to the Camaro. Basically, these are the classes for a Camaro autocrossing in SCCA Solo II:

FS (F Stock) if bone stock (yeah right).

ESP (E Street Prepared) allows lots of modifications, but must run original motor and no subframe connectors. Extensive suspension changes are not allowed.

SM (Street Modified) most anything goes as long as the engine manufacturer matches the body manufacturer.

STU (Street Touring Ultra) allows pretty much anything but you must run street tires and widest tire is a 275.

CP (C Prepared) anything goes as long as it’s still recognizable as a Camaro.

Of these, I had modified the suspension heavily, and was running a larger-than-stock camshaft; I was no longer legal in FS or ESP. As I understood the rules, I still could have raced in SM, STU (because I was running street tires 275 or less), or CP. STU is least competitive if you qualify, SM and CP are pretty much a wash in terms of PAX. However, SM and STU were replete with imports and CP was where most of the domestic cars resided. So to be most competitive I could race in STU, but to race heads up with the other guys running domestics I needed to run in CP. I figured I was not likely to ever be nationally competitive in CP with a pro touring car with full interior and all of the other comforts but also figured I was a long way away from that anyway and it would be a nice class to enjoy the company and competitiveness with my fellow domestic guys and perhaps enjoy some level of autocrossing success locally.

Because there is a season-long points race I wanted to settle into a class and stay there; I decided the rest of my autocross racing in the 2008 season would be in the CP class.