Compression ratio vs Porting

Bigger isnt always better, the port has to have the correct size and shape for the CI and RPM. You can't correlate the first set of heads you ported with making you go slower. Its about the correct shape,size and combination, and that includes the cam, compression, etc. That's like claiming every engine needs "backpressure" to run right.
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Pete Graves
Janesville,Wi

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Yeah i wish i would have had the money(and smarts) at that time, to change my 2800 stall and 3.91 gears, for a good 4500 converter and 4.56 gears.

I thing it would have run well, even with my bad porting skills.:D

It was amazing that with the same cam, it pulled 1000 rpm higher.
That exh port was really pulling hard on the intake port above 4000 rpm.(at least that how i justify the capability of more RPM) :burnout:
A custom cam, to help that situation, could of helped out with the hole rpm range.