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Old Dec 11, 2012 | 12:35 PM
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Default Gears N TPI
What would be the highest rear end gear ratio recommended for a stock tpi intake? assuming best 1/4 mile et was goal
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Old Dec 11, 2012 | 01:27 PM
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3.45 would be close.
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Old Dec 11, 2012 | 02:52 PM
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Thats what I was thinking got 3:73 right now n I'm going threw traps at 6500 ish so doubt I'm really pulling at that point got down 3 tenths from stock gears
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Old Dec 11, 2012 | 05:48 PM
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Originally Posted by 91monsta
Thats what I was thinking got 3:73 right now n I'm going threw traps at 6500 ish so doubt I'm really pulling at that point got down 3 tenths from stock gears
What gear are you in (transmission) and what is your trap speed, 6500 RPM is way too high for a TPI.
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Old Dec 11, 2012 | 05:56 PM
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Automatic by the way, Traps= finsh line. Over drive unless I'm extremely wrong haha
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Old Dec 11, 2012 | 05:58 PM
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13.3 at 102 mph I was expecting to drop to a 13.1 with gears that's why I'm thinking I got the wrong set. Looking to port intake in future
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Old Dec 11, 2012 | 06:07 PM
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Originally Posted by 91monsta
got 3:73 right now n I'm going threw traps at 6500
http://forums.corvetteforum.com/1568185079-post21.html
http://forums.corvetteforum.com/1568186621-post24.html
http://forums.corvetteforum.com/1568212084-post30.html
Last edited by vetteoz; Dec 11, 2012 at 06:10 PM.
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Old Dec 11, 2012 | 06:34 PM
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at that ET and 102...@ 6500, you sure can;t be in OD !
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Old Dec 11, 2012 | 06:57 PM
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Old Dec 11, 2012 | 07:57 PM
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102mph should be 4600 rpm with 3.45 gears and around 5000 rpm with 3.73 gears. Something is wrong with the 6500 rpm that you list, your tach is off. That is a common problem with 1991cars.
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Old Dec 11, 2012 | 08:15 PM
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Wow thanks alot guys that pretty much sloves my issues when spring comes around I'll know what to do
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Old Dec 11, 2012 | 08:26 PM
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Originally Posted by bjankuski
102mph should be 4600 rpm with 3.45 gears and around 5000 rpm with 3.73 gears. Something is wrong with the 6500 rpm that you list, your tach is off. That is a common problem with 1991cars.
Either that or his converter is slipping 20% through the lights.
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Old Dec 12, 2012 | 03:09 AM
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The 3.07 and T700 are a great match as the auto trans first gear is great for launches.
With a manual well 3.45 may be required to get the launch just right.
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Old Dec 12, 2012 | 09:46 AM
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Only thing I dont like is the big drop off to 2nd gear. Other than that I like the first gear being so low.
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