My current RB30det setup is making 312rwkw on 20psi, problem is power peaks at 5800rpm, then drops off fast. I tried adding a set of Tomei 260deg cams, this did nothing to the peak power figgure and it still drops off at 5800rpm.
Specs are:-
RB30det with GT35/40, 600x300x57mm IC, 3" exhaust, 260deg cams,stock plenum, stock exhaust manifold, big feul pump+ injectors, microtech.
I can only suspect there is a major airflow restriction, which i think could be
1.intercooler not thick enough (using 57mm thick core)
2. Stock exhaust manifold
3. stock plenum
If any one has had a similar problem and found the cure, advice would be great.
Cheers