3.42 vs 3.73 on TPI 5 Speed ?
03-27-2005, 10:30 PM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Increasing your gear ratio like that increases the operating RMP's of your motor. TPI is not a high reving induction and does not make power in the upper powerband. Therfore, adding gears that will make your motor run more in that low power area will slow you down. I am pretty sure that guys don't see much track improvement when they go from 3.42's to 3.73's on a stock TPI.
03-28-2005, 11:38 AM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by luvofjah
Ok... so Hooker 2055's, magnaflow 3 inch Cat & Super 40 Flowmaster for exhaust side...
Intake, ported plenum, Accel Runners & Accel Base...
Only bottleneck left is stock heads...
So 3.42 is still better choice ?
Raf
Ok... so Hooker 2055's, magnaflow 3 inch Cat & Super 40 Flowmaster for exhaust side...
Intake, ported plenum, Accel Runners & Accel Base...
Only bottleneck left is stock heads...
So 3.42 is still better choice ?
Raf
03-28-2005, 02:24 PM
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Car: 1989 IROC-Z
Engine: 5.7L EFI LTR setup
Transmission: T-5 World Class
I had 3.08 posi before ...now I got the 3.73's in there. It makes for a fun light to light burner. SOme have gained a half second in the 1/4 going from 3.08 to 3.73. I myself like them alot. Your first gear is dam short though . If you are trying to make the most optimal setup ....go with the 3.42.
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