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Top end w/3.73's

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Old 02-18-2005, 12:08 PM
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Default Top end w/3.73's

What kind of top end speeds can you get with 3.73's, or 3.42's? I know there are variables but what is an average estimate. Like 140, 150, 160?
Old 02-18-2005, 12:24 PM
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A4 im guessing. u can hit 140mph with a 25in tall tire and be doing about 4900-5000 rpm. Thats a fairly close calculation. Ls1's arent known for the valve train so i would stay up there that long.
Old 02-18-2005, 01:31 PM
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Valvetrain has been all replaced with better quality parts, and it is an A4. I just don't want to lose to much topend yet still get great acceleration.
Old 02-19-2005, 01:23 AM
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TH-400 3:73's is speed limited at 156 MPH, it all depends on your tranny gear ratio.
Old 02-19-2005, 02:32 AM
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Well i was going off a 4L60E with an OD gear of .7
Old 02-19-2005, 02:05 PM
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You looking at 145-147 don't remember the rpm maybe a little more. Good enough for me.
Old 02-20-2005, 12:16 PM
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if you like top speed you should of got a m6. i still hit well over 160mph with my 4.11 gears with a 6,800rev.
Old 02-20-2005, 12:43 PM
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should i put 4.10s in my daily driver auto 97 formula? i dono't want to ruin anything, and top speed isn't an issue.




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