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intake runner length

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Old 12-23-2005, 12:45 AM
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Default intake runner length

Does anyone know the LS7 intake runner length? Also, what is the FAST 90 by comparison?
Old 12-24-2005, 07:49 PM
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I measured them, albeit rather crudely, and came up with 7.25. I believe this is shorter than ls1/6/x manifolds, and good for some power up top. Hopefully this manifold is nice.
Old 12-24-2005, 10:23 PM
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I'm sure my measurments are just as midevil as yours, but measuring along the floor showed a little over 9" on my FAST 90.
Old 12-25-2005, 02:09 PM
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If you're after a number to use in any computer simulation program, the measurement is down the port/runner centerline, i.e., average of the long and short side, and it needs to include the distance from the intake flange to the face of the valve. I believe the complete runner length for an LS1 is ~16".



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