Originally Posted by
javierant3
I do about 7000 or 8000 mile each year. This car is a daily runner, what is annoying me is I have been making modifications to the engine, but it refuses to rev up.
Anything higher of 4500-5000rpm is very difficult to achieve, even at 5300-5500 the engine fails, like if it were rpm limited.
I think with my actual spec, the engine can rev up to 6000rpm without major problems.
My actual spec is:
Twin 40 DCOE
Facet silver top 200bhp fuel pump
Newman Phase 1 cam
Slightly worked head (not hemi)
Exhaust manifold from a xr3i MFI
I would of thought revving passed the 5k barrier shouldnt be a problem, the Ph1 cam has a band of up to 6000rpm so i cannot see why this is the case. I fitted a Ph4 cam a few months back with the solids and its max bhp was at 6900rpm and it didnt struggle to get there either, it wasnt even running 40`s just a 34DMTR. The head however was worked by myself and had some serious work done to it.
It could be that it is badly setup or the cam may in some way be restricting the engine??
