11-27-2010, 05:40 AM
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CC Member
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Join Date: Dec 2004
Location: Kansas City,
KS
Cobra Make, Engine: jbl
Posts: 2,291
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Not Ranked
exhaust diameter and length requirements
there's been a few threads asking about exhaust collectors etc. i have a pipemax program that is pretty accurate for predicting exhaust requirements. what i propose is a list of a few of the popular engine requirements so everyone can have an idea of what they need. engines should probably be in the 10 or 11-1 comp range and representative of something that can run on pump gas.
how about a 347, 408, 427w, 427or 428fe, and one of them monster motors made out of the 428 block.
info needed
bore size, crankshaft stroke, rod length, peak hp rpm, comp ratio
intake data: valve head diameter, valve lift, dur. @ .050, degreed centerline, lca
exhaust data: valve head dia., valve lift, dur. @ .050.
there is an input for exhaust port centerline from face of the exhaust valve to mating surface of the exhaust flange, i'll use 3.2 unless somebody has this number, so length requirements of the primaries will be approx.
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