quote:Originally posted by T.Solo:
I’ll start this and let you experts chime in and educate me.
I need a comparison between the C302b heads and Roush intake vs the Edelbrock aluminum heads and RPM Air Gap intake.
The recent sales post for the C302b heads and Roush intake got me thinking and wondering about what the difference would be performance wise given the same bottom end?
I’m currently running the Edelbrock combo with the Holley TB EFI. If all fits under the stock engine cover, barely but it fits. I believe the Roush intake is considerably taller than the Edelbrock RPM Air Gap. Could the Roush intake be milled down and if so what would be the drawback of doing so? Steve
The discussion probably needs to start with power level are you're wanting to achieve and what you're willing to compromise to get there. I don’t know how you’re presently set up but with Eddy Heads and Air Gap maybe =<450HP on 351 cubes or so? If so, assuming it’s more power you’re after, say >550HP, unless you’re willing to run a stouter cam and accept all that comes along with that, there’s probably not much point in switching to a high port head from what you presently have.
If you do, the vast majority of all intakes made for C302B will be spider type open plenum single planes and will be quite tall. Reducing their height will reduce plenum volume, flow, tune,......and performance. I picked up 15 HP by adding a 1” four-hole HVC spacer to mine. With a fair amount of work other intakes can be adapted that are lower in height but may not suit your combo. You will also need new headers as the existing will not work, probably need to cut and rework your tail pipes to match the headers, and maybe relocate one or both coolant tanks to accommodate the new headers. The higher power levels won’t like the stock Ansa muffler cans either.
Depending upon the power level and your style of driving and your existing cooling system, you may or may not get by without needing to upgrade there. Still interested?
Best,
Kelly