help , dropped rear on GN 3", no travel left

[GregInAtl]

WOW....you are the man 442!

OK, I like the height it is at, it really isnt that low looking....so I wanna stay this height.
So you think my best option is a predropped spring 2"+ if anyone makes one, (this was suposed to be 1.975" drop from OEM...but actually raised my car) or second option is maybe a coil spring w/ a near oem rate so when a coil is removed it will make the rate closer to an aftermarket rate and be dropped down?!!
I like everyone am on a budget, and when my moogs installed were 1" higher than my OEM 1986 coils I couldnt have it.....the ziz wheel had to come out.
I am contemplating using my OEM sagged spring w/ a coil removed (softer rate than my moogs obv) and w/ the new shocks maybe I'll be near where I am now w/ control and a more reasonable rate.
Am I following you? I know cutting a pig tailed coil isnt a great solution, but 3" drop on a G body rear seems to be like shading the sun w/ a magnifying glass.

 

[custom442]

This is just stuff I've picked up from books and here on the forum.

I would try to find a drop spring for around a 2" or more. It could be hard to find, but it's worth getting a decent spring rate. And if you must cut a coil, yes make sure it's a softer one than you started this time with. I think most of these cars came with around 115 lb/in springs. You could also call moog and should be able to get the specs on a few different springs that came stock on your car. It's not really recommended to cut over 1 coil but people have done it

You can also google to find spring rate/wheel rate calculators that will help if you'd like to try another moog spring.

(this was suposed to be 1.975" drop from OEM...but actually raised my car)

I'm wondering about this one, where did you get that info from?

 

[jrm81bu]

Check this out.
http://www.opgi.com/product.asp?topcati ... yearrange=

 

[GregInAtl]

TurboBuick.com had a big Moog thread where people w/ OEM cars measured before and after certain spring installs.
I found my issue tonight when I removed the coils and let the car down.....rear calipers barely hit frame still. I will have to notch teh frame up a few inches at that point to clear them.
Friggin rear disc conversion!

 

[custom442]

good to hear you found the problem! make sure to look into those upper a arms.

 

[GregInAtl]

good to hear you found the problem! make sure to look into those upper a arms.

I need adjustable ones? I'll rer-read this thread, It was a lost to absorb.
Again, a BIG thx to you 442, I really appreciate your patience.

 

[custom442]

good to hear you found the problem! make sure to look into those upper a arms.

I need adjustable ones? I'll rer-read this thread, It was a lost to absorb.
Again, a BIG thx to you 442, I really appreciate your patience.

that was a mistype, you need upper adjustable control arms on the rear...

I guess now that I think about it, adjustable front a arms aren't a bad idea either... but stick with the adj. rear ones for now


give one of these guys a call and they'll help you with setting a correct angle. My guess is you'll only need upper arms, but they'll let you know
http://www.scandc.com/currectrac.htm
http://www.umiperformance.com/catalog/i ... cPath=8_60