What you find out on the dyno should be really interesting. After
reading all the "bibles" out there about building up an A-series motor
last winter, I decided to go with the smaller diameter
(A.K.A. "street") Maniflow LCB header rather than the larger diameter
"race" header. My thinking was I had stock valves, a high rear end,
and wanted to keep gas velocity up for accelleration out of turns. I
thought the bigger header would not give me the grunt I was looking
for down around 4,000 RPM, but I bet I pay a price at the top of the
rev range.
Would love to see torque curves with one and the other.
--JohnD
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