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Old 10-03-2007, 03:15 PM
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4 Bar and air bags

I installed a 4 bar and air bag rear suspension in my 57 Chevy pickup a few months ago and took out a mono leaf spring setup (street rod style 4 bar not a drag race 4 link) . My truck has an old tired 350 / 350 and a 308.1 non posi rearend , it feels like since I changed the rear suspension it will spin the right rear tire easier (not a good thing) , breaks loose at half throttle. Is this setup unloading the tires or something or is it my imagination.
Gene

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Old 10-06-2007, 10:55 AM
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Try adding some more air to the right air bag till it won't spin the right rear any more.

Your air bags aren't connected to the same fill line are they?
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Old 10-08-2007, 01:56 PM
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I'm assuming your 4bar maintains parallelism between the upper and lower links and that you can adjust the front bracket up and down.

If so, go to Page 19 of my site. It's possible to adjust your 4bar so that rear wheel loadings are always equal on launch.

http://home.earthlink.net/~whshope
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Old 10-08-2007, 03:56 PM
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Thanks for the input guys . What I have is Fat Bar 4 bar suspension system designed by No Limit Engineering for street use on my 57 Chevy pickup. And Air Ride Tech. air bags.
My setup is not a multi adjustable 4 link suspension designed for drag racing.
Gene

http://www.nolimit.net/prodinfo.asp?number=FTBR%2DAR
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Old 10-08-2007, 11:03 PM
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That's the weirdest setup I've seen offered for sale. Is that purple "thing" adjustable up and down? If so, you can still use Page 19 to adjust for equal tire loading, but you'll have to use the spreadsheet as if you had a competition 4link.

Forgot to mention, in my previous post, that, if you adjust according to Page 19, you will not have to play with airbag pressures. Just use the same pressure in both bags.

And, weight transfer is a function of the car weight, the forward acceleration, the center of gravity height, and the wheelbase. The type of suspension has nothing to do with it. (See "Getting Started" at Page 1 of my site.)

http://home.earthlink.net/~whshope
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