Lowering Black Magic - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-25-2007, 11:29 AM   #1
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Default Lowering Black Magic

Hey all,

I'm thinking about lowering Black Magic (my 91 SSE) and stiffer springs.

I've been talking to coilsprings.com and they asked what are the PNs for my suspension.
When I checked I noticed that there are two options for suspension parts.
Standard and Heavy Duty. I'm assuming all SSE'* came with the Heavy Duty, but I just wanted to confirm here.

The PNs I found are:
Front 22078101
Rear 10027113

What do you guys suggest for a drop? 1in, 1.5? 2?

BTW, and anyone think of any reason I shouldn't lower the car? other then the possibilty of bottoming out.

Cheers,
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Old 04-25-2007, 05:53 PM   #2
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I'd personally on my car go 1" drop, but on your'* [being black, and a bit more modified already], go for a full 2". That would just look insane.

No reasons why, the oil and trans pans are below the cradle, so you have a much lower risk of killing those, and it'd just look too sweet to care about the two scrapes a year you'd get.
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Old 04-27-2007, 03:51 PM   #3
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This is the reply I got from CoilSprings.com

Quote:
I have the O.E.M. specifications for the front coil spring part number.
2207 8101 supersedes to 2207 8100

The rear coil spring part number you give is for a Buck Le Sabre 87-91.
10027113 discontinued No specification available.

I have coil spring for designs for your 1991. We have designed coil springs for the Bonneville to both lower the ride height of the vehicle as well as increase the coil spring rate.
Does that sound about right?
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Old 04-27-2007, 11:55 PM   #4
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Well, I'm not sure what you're doing. Are you just lowering the ELC in the rear and replacing the coil springs up front? Personally I'd go same spring rate, adjustable shocks. But then again i'm more for ride quality than handling performance. Or idk if you can get adjustable shocks for the front struts, and same thing for the rear air struts... hmm there are a many combinations now that I think about it.
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Old 04-28-2007, 12:14 AM   #5
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What are they increasing the spring rate to? I wouldn't go more than an extra 300lbs/in personally.
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Old 04-28-2007, 12:21 AM   #6
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Max 1"

That'* a lot even though it doesn't sound like much. Very noticeable difference in looks and performance.
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Old 04-29-2007, 05:16 PM   #7
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I'm thinkin 1.5 front and 1 rear but if not doing the back then just 1 in the front.
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Old 05-21-2007, 11:26 PM   #8
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Balljoints will suffer alot of added stress and will wear out quicker. Not sure how much quicker.
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Old 05-21-2007, 11:39 PM   #9
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Dirtracr, the car is for sale now. I don't think he'* in the market for springs now.
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