my engine was running 375hp(rr tested) with a t34-63 turbo on it which i have sold(i am trying to find a t4) and have bolted on a t3 just so as i can still use the car for work, its running about 25psi but the car feels gutless, i had a go with a mate from work who has an m3 whom i used to thrash easily when i was just stg3, and he stayed with me last night for the first time !
is it because now the engine is l/comp,greys etc it just needs loadsda air?

pugo