The shortest wheel base, with all spacers behind the arm, worked great this weekend for the I was able to dial in on the FK05. The cars speed was on A main pace with the fourth fastest lap time per driver (10.138) of the day.
However, my driving was rusty from 5 weeks of not touching the M8 and I mistakenly swapped the right front (plaid) and rear (magenta) tires in the last qualifier.
The car worked decent for three laps until the tires warmed up fully. Then after six laps of trying to "lightly" turn left and avoid oversteer, I pulled over and dialed down the left EPA 30 points. Surprisingly, I went on to post a few 10.3's and 10.4's before deciding to take the car off the track early to find and fix the problem before the main.
In the B main, the old worn chassis I had cracked and CA'd previously during asphalt season didn't hold in the end. I started from pole, made a mistake on the 6th lap that cost me 3 seconds and allowed the #2 car to catch up. We had a great battle for 1st for awhile, but I believe the front bumper must have started to separate from the chassis and nullify the effect of the 2mm front anti-roll bar I was using. With each lap, the front end became more and more inconsistent with intermittent and very quick initial oversteer that would cause me to clip the apex or even run directly into the slappers. The bumper finally came off on the 23rd lap and used the anti-roll bar to compress the springs and push both front wheels up into the wheel wells.
However, things look very positive for this setup seeing as I used a lot of old worn parts and only tried a few setup tweeks during an afternoon of practice on Friday. I'll be rebuilding the car with a few new parts in the next two weeks and there's a few more carpet spec parts and setup tweeks to test. I believe I should be able to reduce the lap times by half a second with more testing and practice time.