Deleted
Deleted Member
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64 rear
Mar 15, 2010 14:43:20 GMT -5
Post by Deleted on Mar 15, 2010 14:43:20 GMT -5
I have a new pair of 235-70x15's on vintage stock Oldsmobile 15 inch rims. The combo real fills in the wheel house nice but the cars sits up way to high. Anybody tried to lower the rear by cutting the springs down a 1/2 turn or any other ideas?
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64 rear
Mar 15, 2010 17:05:33 GMT -5
Post by BR[] on Mar 15, 2010 17:05:33 GMT -5
You have to watch the drive shaft length when you cut springs. Make sure the sliding yoke has play and won't bottom out.
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64 rear
Mar 16, 2010 5:32:20 GMT -5
Post by mongoose on Mar 16, 2010 5:32:20 GMT -5
How much to lower it depends both on clearence and personal preference. Last set I had on the car were 275/60-15's, and I think I lowered the rear around 2" to get the look I wanted. To test the amount of drop for look and clearence you can add sand bags or other heavy items to the trunk to get it to where you think you'd like it.
Then to determine how much to cut the springs you can measure the distance from coil to coil from underneath the car while its sitting on the ground (with all the weight back out of the trunk!) This will get you really close to the height you're looking for when you actually cut them. Over time the springs will begin to sag a bit (they'd do that whether you cut them or not), so just be aware that things will get a little lower over time.
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Deleted
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64 rear
Mar 16, 2010 18:30:01 GMT -5
Post by Deleted on Mar 16, 2010 18:30:01 GMT -5
I think a new set of "lowering" springs are a better idea than cutting coils. Several companies have them available in different heights. Cutting coils or heating springs will change the rate of the spring. Also keep in mind what BR[] is referring to.
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64 rear
Mar 17, 2010 4:48:38 GMT -5
Post by mongoose on Mar 17, 2010 4:48:38 GMT -5
I agree a spring designed for the lower ride height would be better...
But don't the spring manufacturers advertise the springs as "x inches lower than stock"? So if you're running a different combination than stock... different size tires, big block v. small block, cast iron v. aluminum intake, etc, isn't it going to be a bit of a crap shot the actual ride height you'll get from a set of lowering springs? So if the springs he has in there right now are not what producing what would be considered a stock ride height, then getting springs with a 2" drop might not produce the results he's looking for.
Am I over analyzing this here?
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