Took my stage 3 Rotrex supercharger conversion to the track today. With great expectations. I'd run a 12.4/114 with my st2 kit. Now I have the C38 blower on and I fitted the Mickey T Street ET's, they set the back end up a bit high as the rolling radius was up on the stock tyres. Did my first run, 12.8/105mph. The car felt very unstable at speed and I didn't get much grip off the line. It was quite frightnening.
I progressively let the rear tyre pressures down and got more and more grip and it felt more and more stable as the back end sat lower. 4th run I pulled a 1.78 60 ft and a 21.13/118 terminal into a 40 mph head wind. I was getting confident of an 11.
The car had hit a false rev limit on the 12.1 run as the boost cut was set marginally to low, I realised the problem and upped the boost cut. Queued up again, it rained and there was a long down time. Racing started again, but the track was not so good, temps were down and the grip wasn't there. I let the rears down from 19 to 14 psi to try and find some grip. Did a big burn out. Launched as hard as I could but the tyres lit up, the car rear went out to the right, I shifted up and the rear shot left, I tried to correct but it was to late, The back left corner smacked the wall square on the rear wheel. Game over. Trailered the car home. I need a new rear wing, wheel, brake disc, and suspension arms at least. So disappointed. That's racing. Still I can't complain. I've drag raced cars and bikes since 1972 and this is my first crash.
I was in the left lane, if I was in the right I wouldn't have hit the wall. Shit happens!

 

ouch. like you said, shit happens. the trap on the 12.1 run is nice. what kinda power you throwing down with that blower? any dynos?

 

My rollers show 381 at the wheels but I know it's about 15% down on a Dyno Dynamics as I have results from a customers car earlier this year. So about 440 whp.