Hello all

I have a t38 cosworth engine running just over 30psi so should be around the 440bhp. Engine was built about 5,000 miles ago so its fresh and it runs fine doesnt smoke etc. I started to think It was lacking power although the boost gauge was still reading over 30psi and had no running problems as I said so thought it was me. I took it on a rolling road for a power run last week and it only made 380bhp.

The car is a saph 2wd.

Any ideas what to look at to why its low on power?

Regards