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Old 01-27-2009, 10:01 PM
WSSix WSSix is offline
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you really don't need/shouldn't use a sheet manifold intake on an LSx unless you are building either a very large motor or running very high boost levels that require the use of a 100+mm throttle body. There are too many other choices that work great. You've got carb style intakes and ported plastic ones. FAST will have a new intake coming out in a few months for the L92/LS3 that should prove to be great. These engines also don't need that much air if you drive it on the street. A 95mm throttle body is the max you want to use for a street car and those are reserved for the stroker motors pushing 420 cu in plus. Anything larger has bad off idle/off throttle characteristics and is sluggish. It'll only like WOT, nothing in between. You size the manifold accordingly and it becomes obvious the flow potential of a sheet metal one is not needed. People often lose track of air velocity in search of pure volume which leads them to believe bigger is better. Velocity must be maintained.

This new FAST manifold is designed to work with either a 90 or 92 to 102 mm throttle body. It should easily support any stroker motor designed for street driving.

Oh and no, I've heard nothing about this BG intake. Sorry to not stay on topic
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Current rides: 2000 BMW 540i/6 and 86 C10.

Former ride: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims

Last edited by WSSix; 01-27-2009 at 10:07 PM.
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