Ls question

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May 28, 2011 | 06:00 PM

Thirdgen82

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Joined: Dec 2010

Posts: 31

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From: Oxford, Alabama

Car: 1982 Camaro Z28

Engine: 350 small block

Ls question

What would be better as far as gas mileage and horsepower, an 5.3 out of a silverado and suv..or a ls1?

May 29, 2011 | 12:40 PM

drknow90rs_ss@y

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From: Wittman,Az

Car: 86 IROC-Z, '71 RS

Engine: 305 TPI/ 350

Transmission: 700R4/TH350

Re: Ls question

Both would be about the same, as long as you are using an LS-1 intake. The real factor in fuel mileage using these two motors is going to be the transmission. Might get about an extra 1 mpg out of the 5.3.

May 29, 2011 | 09:55 PM

Pocket

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From: NC

Car: 91 Trans Am

Re: Ls question

I got 27mpg highway with a stock 5.3/4L60E with 2.73 gears driving it like I stole it

Stock/small cam T56 swaps see mid 30's, both 5.3 and 5.7's

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