Coil spring upgrade
Thread Starter
Teching In
Joined: Jan 2014
Posts: 23
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From: Cincinnati,Ohio
Coil spring upgrade Hi quick question I want to upgrade the rear suspension on my Buick Super. Several of the guys have done Eibachs or similiar lowering springs but I will have clearance issues with my summer wheels. These are a 255/35/20. So I am thinking about just putting the factory front coil springs on the back. Same ride height just a stiffer spring rate. I already bought the factory FE4 Bilstein struts because the car has 120K on the old suspension. I am going to combine this with the w body bmr suspension. I am only doing the rear right now out of money. Thanks for your input!
Hi quick question I want to upgrade the rear suspension on my Buick Super. Several of the guys have done Eibachs or similiar lowering springs but I will have clearance issues with my summer wheels. These are a 255/35/20. So I am thinking about just putting the factory front coil springs on the back. Same ride height just a stiffer spring rate. I already bought the factory FE4 Bilstein struts because the car has 120K on the old suspension. I am going to combine this with the w body bmr suspension. I am only doing the rear right now out of money. Thanks for your input!
TECH Enthusiast
Joined: Nov 2008
Posts: 622
Likes: 1
Here is something to think about:
The LCs,GXP,MC and IMP with the LS4 all have the same front springs... lets use the Moog P/N as an example CC670
Now the IMP and the LCs have the same rear springs P/N CC81035
and
The GXP and the MC use the same rear springs CC697
The LCs,GXP,MC and IMP with the LS4 all have the same front springs... lets use the Moog P/N as an example CC670
Now the IMP and the LCs have the same rear springs P/N CC81035
and
The GXP and the MC use the same rear springs CC697
GM has different part numbers for ride heights and the different spring rates. The GXP definitely has unique springs, front and rear, that are not shared with any other W-body.
TECH Enthusiast
Joined: Nov 2008
Posts: 622
Likes: 1
I wouldn't particularly make that assumption just because Moog issued a standard part number for all vehicles.
GM has different part numbers for ride heights and the different spring rates. The GXP definitely has unique springs, front and rear, that are not shared with any other W-body.
GM has different part numbers for ride heights and the different spring rates. The GXP definitely has unique springs, front and rear, that are not shared with any other W-body.
Keep in-mind the OP is wanting to modify so I offered a basic input.
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Verdad Gallardo TECH Enthusiast
Joined: Nov 2008
Posts: 622
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I would recommend an aftermarket spring as you want to keep the height but lower the squat rate, correct! something along the line of cargo coils maybe.
Here is the specs and you can research the earlier part numbers to see if something may meet your requirements.
http://www.moogproblemsolver.com/moo...rings_Spec.pdf
Here is the specs and you can research the earlier part numbers to see if something may meet your requirements.
http://www.moogproblemsolver.com/moo...rings_Spec.pdf
TECH Enthusiast
Joined: Oct 2013
Posts: 611
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From: hagerstown,md
springs i went with canuck motorsports springs but they do lower ride height,go to their website and call them like i did and i told them what i want and they delivered the right item-they will give u lowering measurements and everything nic e people eh?
Teching In
Joined: Sep 2004
Posts: 2
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From: Midwest
I happened to find this thread while searching.
I have a 05 Buick LaCrosse CXS that's my daily beater. It has an *** dragging problem. Only 74k miles but I think the stock springs are flat. I've recently replaced all 4 struts but I'm kicking myself for not doing the springs in the rear.
I've been searching Moog springs and they list the CC81035 for my application. I was wondering what the difference was between them and the CC697 for GP GXP, Intrigue etc.
A big thanks for the link Ill_Born_ss posted. From that chart, it appears the 81035 carries more load?
Part / Inside / Bar / Spring / Load / Install / Free / End / End
Number / Dia. / Dia. / Rate / / Height / Height / Type 1 / Type 1
CC697 5.42 0.562 122 680 9 15.81 PT TG
CC81035 5.4 0.562 125 740 9.5 15.42 PT TG
I'm obviously not on a handling mission, I just don't hate saggy read ends.
I have a 05 Buick LaCrosse CXS that's my daily beater. It has an *** dragging problem. Only 74k miles but I think the stock springs are flat. I've recently replaced all 4 struts but I'm kicking myself for not doing the springs in the rear.
I've been searching Moog springs and they list the CC81035 for my application. I was wondering what the difference was between them and the CC697 for GP GXP, Intrigue etc.
A big thanks for the link Ill_Born_ss posted. From that chart, it appears the 81035 carries more load?
Part / Inside / Bar / Spring / Load / Install / Free / End / End
Number / Dia. / Dia. / Rate / / Height / Height / Type 1 / Type 1
CC697 5.42 0.562 122 680 9 15.81 PT TG
CC81035 5.4 0.562 125 740 9.5 15.42 PT TG
I'm obviously not on a handling mission, I just don't hate saggy read ends.
