Ive put my car on the rr today after a ££££ worth of mods including tt38, 83lb injectors, plenum spacer, 500cooler, 200block, 7-8-1cr msd chip, i was waiting to see around the 450bhp mark, to be given a reading of 385bhp 415lbft.

I cant belive how bad it did with these mods!! There was 33psi spike and 30psi held of boost and perfect amount of fuel... so where is the power loss?

ive got paper work of porting to the head of 25.5mm inlet standard outlet ports and also reprofiled bd10 cams but i can't be sure that its the same head as the history goes way back.... my other concern is perhaps my cr is slightly lower than 7-8-1 could this cause this?

Whats your spec around the 450bhp, headwork cams etc?

cheers