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Old 10-20-2009, 05:31 PM   #14
chevy_mike
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Join Date: Jul 2006
Location: San Diego, CA
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Re: 2004R trans with 3.08 axle

Quote:
Originally Posted by wwotr View Post
Yea at 55-60 MPH I'm taching about 2300 RPM's.
I'd LOVE to see it at around 1600 RPM, and I betcha my Gas Mileage would improve too!

Roger
"RATIKLE"
Not necessarily. It all depends on your setup, everything from the carb, cam, converter, etc. If you are lugging the engine, you can actually use more fuel because you end up using the throttle more to maintain speed because you are out of the power band. Most engines are most efficient when kept in the power band. Below or above it, you will typically use more fuel.
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