what a difference

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04-10-2008, 10:00 PM

Drew

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what a difference

between my stock 265's and my 315's with engine speed. . .before at this RPM I'd be doing maybe 65-68 mph, now I'm doing 75

pic taken with phone so it may not be all that clear. also the speed has been verified by two different GPS units[8D]

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04-10-2008, 10:08 PM

Az2500Cummins08

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RE: what a difference

Yeah I noticed the difference too. At 65 MPH my engine dropped 200 RPM with the 315's. At 65 indicated I am actually doing 71 (GPS verified.

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04-10-2008, 10:29 PM

campermama

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RE: what a difference

But can you climb a hill? Is your gas mileage better?

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04-10-2008, 10:44 PM

Drew

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RE: what a difference

I'm running the 170hp tune on my smarty. . .yea, I can climb a hill

may have to try stock and see what happens. if I did my math right, my 4.10's running a 34" tall tire is the same final drive ratio of a truck with 3.73's running 31's.

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04-11-2008, 12:19 AM

ga_noplugs

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RE: what a difference

Quote:

ORIGINAL: Drew

I'm running the 170hp tune on my smarty. . .yea, I can climb a hill

may have to try stock and see what happens. if I did my math right, my 4.10's running a 34" tall tire is the same final drive ratio of a truck with 3.73's running 31's.

Hey Drew, does this mean I wont have to keep slowing down in the future when Im following you?

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