Following on from this topic: https://passionford.com/forum/genera...ld-please.html I could now do with some help with a turbo to go with it. Currently I think in use is a Turbonetics GTK550 series (that right????) which seems about the size of a GT35. On 25psi it produced 400bhp on the old spec engine.

The new engine will be looking to produce circa 600bhp. It needs to be good at spooling up, and not working its knackers off to make the power.

Any ideas?