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- - My 71 Firebird - untamable (https://www.lateral-g.net/forums/showthread.php?t=51053)

Im surprised the car sits that low with the 4 link. I was worried my car was going to sit too high.

Definitely too low for me. Needs to go up a bit. Still haven't heard from Ridetech about what they suggest.

Can you adjust the coilovers up some more? If not, you may need a stronger spring in the rear.

There is supposedly some bind going on somewhere. The drivers side rear (which is higher than the passenger side rear) isn't compressed much. The passenger rear is compressed almost fully and is still lower than the drivers side by 1/2" The front is similar but exactly opposite of the rear.

Have you tried placing jack stands under the rear frame rails and using a jack to put the suspension through it's range of motion? You should be able to see the bind doing this.

I haven't. They asked for some measurements and now just waiting on a response.

ok. Hopefully, they come back with some easy fixes.

Quote:

Originally Posted by cpd004 (Post 615995)

thanks....yes it has an older Vintage Air system that was working fine with the original 400. I just never bothered to upgrade the compressor to get it working with the Ls3. They have just come out with a new system for 2nd gen's that finally adds a decent looking control panel. It is on the to do list some day.

The car is mini-tubbed. I originally planned on 335/30/18's back there and just couldn't see how it would fit even though others with my same exact set up have used this size successfully. I wish I would've never tubbed it, since the tires I went with will fit the factory wheel wells easily.

The car is actually too low or I need a panhard bar maybe. When I back into my garage which is barely pitched, the inside tire on the passenger side comes in contact with the upper wheel well in the back and stops the car immediately.

I'd rather not go with a lower profile tire as I really do like the look of a bit more rubber. Been waiting on advice from Ridetech.

http://img.photobucket.com/albums/v2...C6F55B6460.jpg

The rears are 275/40/18's.

You have any pics of the rear suspension from underneath the car? What spring rate are you running out back? Which Ridetech shock are you using? It took me a few adjustments on my coil overs and spring rates with help from Ridetech to get the ride height acceptable without rubbing, scraping, and comfortable ride quality.

They are single adjustable shocks. The rear springs are 185. There's nothing in the trunk and some of the interior isn't in the car. It can only get lower as it is now when adding weight.

I'll see if I can find some pics.

Here are a couple.

http://img.photobucket.com/albums/v2...386647B12C.jpg

http://img.photobucket.com/albums/v2...E674FFD9A2.jpg

I talked to Ron Sutton (great guy!!) about it and he asked for some info including weight. Oddly its very hard finding anyone with scales near me. Hopefully this weekend I should be able to get that info finally.