01-22-2011, 02:30 PM
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CC Member
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Join Date: Jul 2010
Cobra Make, Engine:
Posts: 80
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Not Ranked
Ok, but given no constraints with space - what would be the optimum length of the entire exhaust system be (header to tailpipe exit)?
Pretend the motor is on an engine mount, no car. If I cherry pick from your post #20 -
Single Primary Pipe (427, 3500-6000 RPM)
Length = 39.4" (highly recommended, best torque curve). My comment, but also note min RPM starts at 3500 so this is sort of a peaky setup.
From Collector Merge to Tailpipe Exit
Length = 43.0" (more bottom-end Torque). I selected this to counter some of that Primary Pipe peakiness above.
"Hypothetical Optimum" System Length = (39.4" + 43.0") = 82.4"
The assumption I am making is that your primary pipe length is determined by the distance from your exhaust port flange right to the actual 4-1 merge inside the collector (and obviously that all your headers are the same length).
Is the above a valid calculation knowing I fall within the pipe ID ranges in your post #20?
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