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Re: SVO: Header VS. Ported manifold?
On Mon, 8 Dec 1997, FFASTSVO wrote:
> Ok guys...let's forget about the $$ and the cost difference and soley
> concentrate one aspect between the header (ETS/ATR) and a ported late model
> stock exhuast manifold. Which one dominates? Is there a great difference
> between the header and manifold. Besides the CFM rate, I've heard the header
> provides awsome (1800rpm) spool up, something I believe the manifold can't do.
> If the tooth (2.3li?) fairy asked you to choose to have one or the other and
> knowing what you know, which one would you pick?
The fastest 2.3Ls I know of run the manifold -- Reider (11.XX in a TC) and
Byrnes (at the time he ran 11.XX). Byrnes runs a header now, but it's one
he made. The people that spend tens of thousands and go 12's and 13's
with stroker motors have the headers -- makes my own choice an easy one.
Unless the headers were exactly the same size as the exhaust port (and
they aren't), with a real collector (which they don't have) and well
insulated, they aren't gonna "...provide awsome (1800rpm) spool up...".
This may be getting back into the "black magic hocus-pocus" that the
religious types on the list don't believe (understand?), but I think
Bernoulli figured this stuff out about 150 years ago. ;)
Have fun and save your pennies (big bags of them),