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Old 05-05-2006, 08:24 PM
72NOVA454
 
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72 nova rear end upgrade

Help

my 72 nova rear end is stock, except for the posi-traction differential. The motor is a modified 454 chevy. The trans is a turbo-350 with a shift kit and holding up very nicely so far to the 550 HP motor. I am ready to plan this upcoming winter's upgrades to the car. I want the car to get better traction so that it "launches" from a dead stop. Right now she smokes the tires quite a bit even with the 3.08 gear and stock torque converter.

The car is for "street only" use. It will NOT be drag-raced at the track. Even having said that, I don't want to lose a street race if you know what I mean. I want the car to be able to run high 10's, low 11's. I need to "launch" the car for that to happen right. I put subframe connectors on to help stiffen the frame.

what should I do next? I don't want to tub the car, I don't want to spend thousands on a completely re-fabricated new rear frame and suspension for a car that only is for that street and runs 10's. right now the widest tires that will fit are on there P235-60-15. there is only 8.5 inches of tread touching the pavement. no wonder they spin. any wider of a tire would rub the sheet metal or the shock mount. there is no more room right now to go wider.

should I just throw traction bars on there or do something more? I have a budget of about $1500 to spend on this. I usually do most or all labor myself (except heavy welding & fabrication) that I can't do.

thanks for your help. you can send me photos of what you have done if you feel it would help. my email is

lwallace@pcsoc.com

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Last edited by leejoy; 05-06-2006 at 08:16 AM.
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Old 05-06-2006, 12:07 AM
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turbo lag......yeeeeehaaaaaaw
 
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If all you can fit is 235/60r15's you need new rims. I recently put my bigger tires on so I will try and get a picture of those. You can run a 275/60r15 with a 15x8 rime with a 4.5 backspacing. You don't have to tub your car for traction. There is a nova running 8.16 on the 275 tire.Since this is a street car I would not go all out and by clatrac bars. Some regular slapper bars should be fine. the first thing you will hit on your nova will be the shock. The comp engineering bars move the lower mount inside more for clearance the next would be the inside wheel well and leaf springs. the make a 40 dollar kit to move the rear of the springs inward as they are not perpendicular from the factory.If you do modify the inner wells you can run wider rims with more backspacing without narrowing your rear.
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Old 05-06-2006, 08:18 AM
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Quote:
Originally Posted by 1969NovaSS
If all you can fit is 235/60r15's you need new rims. I recently put my bigger tires on so I will try and get a picture of those. You can run a 275/60r15 with a 15x8 rime with a 4.5 backspacing. You don't have to tub your car for traction. There is a nova running 8.16 on the 275 tire.Since this is a street car I would not go all out and by clatrac bars. Some regular slapper bars should be fine. the first thing you will hit on your nova will be the shock. The comp engineering bars move the lower mount inside more for clearance the next would be the inside wheel well and leaf springs. the make a 40 dollar kit to move the rear of the springs inward as they are not perpendicular from the factory.If you do modify the inner wells you can run wider rims with more backspacing without narrowing your rear.
dear 69novass

thanks for your help. now that I've got you hooked, lets talk. can you send me some photos of your car and the rear end stuff. please explain what you mean by "backspacing". I will check out competition engineering website to look at the shock mount relocaters that you talked about. that's my biggest problem is the shock mounts. those need to get relocated. the leaf springs can stay where they are.
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Old 05-06-2006, 10:16 AM
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Backspacing is the measurement form the hub mounting point to the inner lip of the wheel.
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