3.73 and 4.10 rpm's with A3?
01-31-2006, 12:28 AM
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3.73 and 4.10 rpm's with A3? Hey guys, just wondering what kind of rpm's you guys are running at highway speeds with 3.73 or 4.10 gears with an A3 tranny? I'm looking into getting a 400 tranny with either 3.73's or 4.10's but also judging if it's practical? Looking for rpm's around 60-70mph?
01-31-2006, 11:47 PM
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20mpg is pretty impressive considering your running between 3000 and 3500rpm's. What kinda tires are you running? I tried to leave my car in 3rd and w/ 3.42's it seemed to be running around 2800-2900rpm's at about 60-65.
02-01-2006, 08:21 PM
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SUX2BU, I'd like to know why are you running 31 inch truck tires? It's obvious you know your stuff. Iv'e just never seen it before on a f-body. I'm guessing it's just on the back though.
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02-01-2006, 10:27 PM
#8
Originally Posted by HeapaShifter
SUX2BU, I'd like to know why are you running 31 inch truck tires? It's obvious you know your stuff. Iv'e just never seen it before on a f-body. I'm guessing it's just on the back though.
With the 31" tires and 4.10 gears it ends up being the same as 3.42 gears and stock sized tires.
With the 31" tires and 4.10 gears 60mph is 3,000 rpm and 70 mph is 3,500 rpm.
If i had stock sized tires. 60 mph would be 3,618 rpm's and 70 mph would be 4,221 rpms.
adding a higher gear raises your cruising rpm and vise versa.
adding a taller tire lowers cruising rpm and vise versa.
Last edited by SUX2BU; 02-01-2006 at 10:41 PM.
