What is involved in installing an airbag to preload the pass rear tire? How much do the parts cost? Can you drive on the street with it inflated or do you only inflate it when you're at the strip? I mainly do autocross, so would it help me power around corners or just hurt me? I have an open diff with 2.73 gears. I can't afford to replace it with a posi unit and steeper gears right now.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.

 

An air bag kit (2 bags) is $63 from Summit. They fit inside the rear springs. Have the rear of the car on jackstands on the frame. Disconnect the bottom of the shocks and drop the diff down far enough that the springs will come out. Install the air bags as per the instructions and route the lines to a convienient location. As long as you check the air pressure regularly like you're supposed to do on tires, you can drive around with them on the street. If pressure drops to zero then you risk rubbing a hole in them because they won't stay in place.

You can install both bags or just one on the passenger side and sell the other. It's trial and error to determine the best pressure to run but set up properly an open diff can hook up just like a posi.

I run both bags in my race car. I keep 5 psi in the drivers side and 15 in the passengers.

A good place to run the air line(s) to is behind the gas cap door. That way every time you fill up, you can check the air pressure at the same time.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

[This message has been edited by Stephen 87 IROC (edited February 27, 2001).]

 

ive been interested in this for a while is that all it takes? its just like installing air shocks. well sh*t i should have done this a while ago. man i am dumb. oh well i will get on that soon i guess.
~Rare~

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1990 IROC-Z L98/G92 350 TPI
too much to list!!
5,507 IROC's; 2,415 5.7L IROC's Produced in 1990
Dare to be DIFFERENT, GOING ORANGE this summer.
DAILY DRIVER: 1991 S10 2.5L/5SPD WITH CAMARO RIMS
MUSTANGS...ONLY 4 LUGS....HAHA THAT IS HILARIOUS.

 

Thanks for the info. Sounds easier than I thought it would be, and it's cheap too! Are you talking about the Air Lift kit in summit?

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.

 

Yes. I can't remember the part number. There are different kits. Just order it for a third gen.