9" or 12 bolt???
07-21-2008, 12:57 AM
#2
TECH Regular
What are your goals? street or strip?
Street set up a 12 bolt would work well. 12 bolts have less drivetrain loss than 9 inch. Also with 35 spline axles you wont break them with street abuse.
9 inch for a e/t car. You can swap out gears on site at the track Bigger ring and pinion than the 12 bolt. A well built fab 9 will handle the abuse from anything a lt1 can throw at it.
Street set up a 12 bolt would work well. 12 bolts have less drivetrain loss than 9 inch. Also with 35 spline axles you wont break them with street abuse.
9 inch for a e/t car. You can swap out gears on site at the track Bigger ring and pinion than the 12 bolt. A well built fab 9 will handle the abuse from anything a lt1 can throw at it.
07-21-2008, 08:28 AM
#3
Yeah I agree with Tx94z, they are both good, 12 bolt is supposedly more efficient and can be built for abuse both street/strip. 9" are stupid strong, little heavier, 31 splines are good down to high 9s, 35 spline even better.
When I had PEPE I swapped my 12 bolt to a 9 due to ring/pinion bent teeth breakage, turns out Pyle Bros in Baytown wasn't paying attention and put in the wrong gear set (series 3 or 4 carrier not sure what I had) for the carrier my 12 bolt had, didn't find this out till I swapped and someone else had it fixed the right way and I had the 9" fully built and in the car by then...live and learn.
When I had PEPE I swapped my 12 bolt to a 9 due to ring/pinion bent teeth breakage, turns out Pyle Bros in Baytown wasn't paying attention and put in the wrong gear set (series 3 or 4 carrier not sure what I had) for the carrier my 12 bolt had, didn't find this out till I swapped and someone else had it fixed the right way and I had the 9" fully built and in the car by then...live and learn.
07-21-2008, 09:17 AM
#4
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Just go with a S60.
Also depends are you a auto or manual? The S60 is heavy but less drive train loss than a 9-inch and stronger than a 12-bolt. I would go with a 9-inch or S60 if your a manual and a 12-bolt if your an auto.
Also depends are you a auto or manual? The S60 is heavy but less drive train loss than a 9-inch and stronger than a 12-bolt. I would go with a 9-inch or S60 if your a manual and a 12-bolt if your an auto. 
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07-21-2008, 11:45 AM
#9
with the 9" you will never have to worry about it braking and the fact that it bolts right up to the stock torque arm location is very nice. The 9" is a proven rear I am very happy with mine.
