Dodge/Ram Diesel Tech Discussions on all generations of Cummins Diesel powered Rams plus the new Eco Diesel

what a difference

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Old Apr 10, 2008 | 10:00 PM
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Default 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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Old Apr 10, 2008 | 10:08 PM
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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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Old Apr 10, 2008 | 10:29 PM
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But can you climb a hill? Is your gas mileage better?
 
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Old Apr 10, 2008 | 10:44 PM
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Default 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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Old Apr 11, 2008 | 12:19 AM
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Default RE: what a difference


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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Old Apr 11, 2008 | 08:21 AM
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Default RE: what a difference

nope. . .I'll do 80 without thinking twice now. . .except to look at the fuel gage
 
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