David9er
15+ Year Contributor
- 61
- 0
- Apr 23, 2008
-
Evansville,
Indiana
Instead of going back and forth like little girls fighting over finger nail polish, just ask somebody that has a 2.3 and switched from a stock manifold to a JMF manifold.
I switched from a stock manifold\TB to a JMF street manifold\1g TB on a E16g turbo. The stock setup was more torquey, 264 cams had decent mid range too, but the top end fell off bad!! After switching manifolds and TB I noticed a very slight delay in spool, mid range even better, and a top end that still falls off after 6k but not nearly as bad.
Switched to speed density and and new turbo intake (ram air) setup and now the instant spool is back, mid range ever better, and a top end the stays flat (not peaky like a honda, still on 264 cams).
Any time you have more rotational mass it is going to be harder to make an engine spin faster. Remember that there are no "free lunches" in engineering, you have to sacrifice something to gain somewhere else, the trick is to sacrifice something you wont miss. There is a reason Big block V8s spin to 6K and Honda guys destroke to 1.6L so they can spin up to 11-12K. It is a lot like a supercharger, It makes enough power low to mid to justify itself but up top it only robs you of power.
Not saying it can't be done, just that the difficulty level goes way up.