Fast LSX runner length

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Dec 24, 2004 | 01:46 PM

Phil99vette

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From: Port Tobacco, MD

Fast LSX runner length

Has anyone tried shortening the runners in the 90mm FAST intake?
Phil

Dec 27, 2004 | 12:50 PM

GrannySShifting

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From: Glen Burnie, Md

I know someone that has done it in a LS6 intake.

I dont know if Id shorten it anymore, unless you need to set something up with a 7500-8200 rpm shift point.

Dec 27, 2004 | 04:23 PM

critter

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From: Goshen, IN

Quote:

Originally Posted by GrannySShifting

I know someone that has done it in a LS6 intake.

I dont know if Id shorten it anymore, unless you need to set something up with a 7500-8200 rpm shift point.

I thought I read here that the Fast is actually longer than the LS6 ...

Dec 27, 2004 | 05:19 PM

GrannySShifting

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From: Glen Burnie, Md

no chance its longer or has less cross section area. Id bet money it was. have to get someone to tap ethe top and bottom of each runner and measuer

Dec 27, 2004 | 08:12 PM

NXRICKY

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From: Wichita Falls, TX

We Shorten the runners on a LS1 intake during our intial testing. At first we we just blown away saw 20hp over the stock ls1 intake. But hang on. Then put the same intake on a performance engine and went down 19hp. The intake that made more hp would only do it on a BONE stock engine. ALl other testing shown the intake was crap even. We took and made pleniums smaller, larger, moved the inlet around, dropped the floor. If I remember correctly we cut up over 10 LS6 and LS1 intakes.

Ricky