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Thread: seeking header design help . . .
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06-29-2017 #1Registered User
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- Sep 2007
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seeking header design help . . .
I'm making a set of Tri-Y headers. I'm trying to figure out a lesser-of-evils issue for airflow.
Engine: Low/midrange torque is more important than high-RPM horses. Closer to a truck motor than a racecar.
The classic SBC/Corvette "Rams Horn" manifolds are known for flowing quite well compared to smaller iron logs. But my gut reaction to the design is that it must really choke off the inner two cylinders, with the long outer tubes landing on the inner exhaust ports like that. There's basically no primary length on half the cylinders and a significant primary length on the others.
I guess what I'm wondering is, once the possibility of near-equal length tubes is off the table, does it still make things a lot worse to have that big mismatch? As opposed to retaining a couple inches of length on the shorter primaries? The extreme mismatch must be less harmful to airflow than I expect or else the Rams Horns would suck.
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06-30-2017 #2