Anyone Talked to Marshall lately?
12-04-2002, 11:39 AM
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Location: Lynchburg
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engin...what? i just welded scraps together...?
well, here goes.
runner diameter is dictated by the port size, so that's an easy one. length has a bit more thought involved. unfortunately it's really hard to get info about manifolds for turbo apps - at least theoretical stuff. so i just ended up talking to a bunch of companies that make mani's for turbo apps. marco at magnus motorsports and the fellow (can't emember his name) at Polk performance were very helpful.
the fellow down at wrighttouch in fla convinced me to go with a healthy sized plenum which ended up being ~230 cubic inches since the runners protrude into the plenum a bit.
powerband i care about is 4500+.
marshall
well, here goes.
runner diameter is dictated by the port size, so that's an easy one. length has a bit more thought involved. unfortunately it's really hard to get info about manifolds for turbo apps - at least theoretical stuff. so i just ended up talking to a bunch of companies that make mani's for turbo apps. marco at magnus motorsports and the fellow (can't emember his name) at Polk performance were very helpful.
the fellow down at wrighttouch in fla convinced me to go with a healthy sized plenum which ended up being ~230 cubic inches since the runners protrude into the plenum a bit.
powerband i care about is 4500+.
marshall
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