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Old 09-08-2008, 05:38 PM
RICK LAKE RICK LAKE is offline
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Join Date: Mar 2001
Location: E BRUNSWICK N.J. USA,
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Thumbs up What car are you looking to buy??

qmaster Jason It depends on what cobra kit you buy. The other thing is what you are going to do with the car and how MUCH HORSEPOWER are you dropping in this car. Jags rearends are nice, good for about 450hp and torque. This is with the 27 spline rearend. The ratio of the rearend also has alot to do with max HP in the car. The small the rearend ratio the less power I would put through it. You can offset this with what trans you are going to run, and what ratios are in it. Automatic IMO are easier on the drivetrain than a speeder. 30 spline Jag rearend with chromemoly shafts and carrier support are good for about 600 HP and torque. Some cobras use the 8.8 IRS from ford. They are good for about 500 hp and torque with the stock output shafts. There has been some twisting of the CV joints on these rearends with high hp motors or dragracing. Alot also depends on what tires you are running on the car. Autocross or tires with 140 wear indicators are more sticky to the road and give better traction, they are also harder on the drivetrain. If you are going to dragrace the car, a 9" ford rearend is the way to go with a 5 link suspension setup. The car will take alot of abuse with this rearend. If you have big bucks, a franklin quick change rearend is good for 750 HP and multi gear changes in 20 minutes. The internals are 9" ford gears and the ratios are from 2.40 to 6.50. IMO a IRS rearend will handle a little better than a solid axle. There would you have the rear brakes? inside or outters. 4 Shocks or 2 for the rear end. Jason we need a little more info on who and what you are looking for. This will get you started on options. My last suggestion is to OVER ENGINEER the car and try and make it bullet proof. If you want to talk, call me in the evening. I'm in NJ 732-254-3536 I will give you the best info I have on this. 8 years racing a jag rearend with 3.31 gears. No problem yet to date. Have gone for 368hp to about 460. Will know on Sat the final numbers on the 482 motor. Torque is the important number more than HP.
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