Raced my stock .12 STI in my RRR for the 3rd time today and I have to say, that I'm pretty disappointed with it's low end performance. I must be doing something wrong.

First two times I raced it, it spooled up real nice, but it wasn't very fast. In the infield between turns, it seemed to take too long to spool up. It could keep up with other cars on the 250' straight, so the top end seemed fine.

So for today's race, I added a 0.15mm shim (total 0.58mm "solder method" head clearance), switch to 30% nitro (up from 20%), ran a Sirio 6 turbo plug (versus 7), Skyline VR12 Plus pipe, stock RRR clutch setup with the nut at 1.5mm and stock gearing (1st Gear: 16/61 and 2nd Gear: 21/56). The car spooled up a little bit better, but still not fast enough between turns. So I switched to a 15T 1st gear pinion (only thing I had to work with), which gave the car some zip, but I'm still not laying down any serious power.

Any suggestions? What HSN/LSN settings are you guys running?

Thanks