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Proper height for rear suspension

Forum: C3 Engines, Driveline and Handling

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Proper height for rear suspension

Posted: 6/24/10 3:39pmMessage 1 of 4
R
Former Member
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Fallbrook, CA - USA
Joined: 5/4/2010
Posts: 2
Vette(s): 1972 350 coupe
Just installed the new mono composite transverse leaf spring from Corvette Central.  Now the rear seems to be sitting too high.  it is measures 29.5" from the garage floor to the outer edge of fender well.  That is about two inches higher than before. What is the correct height and how is it best adjusted? 
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Proper height for rear suspension

Posted: 6/24/10 4:44pmMessage 2 of 4
j
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Bloomfield Hills, MI - USA
Joined: 6/29/2008
Posts: 199
Vette(s): 1975 Corvette coupe, 4 speed manual, 383 ci 9.5:1,Edelbrock dual plane Air Gap intake, Alum Heads,Comp Cam, roller Rockers, PS,PB,Tilt
The way to adjust height is with the long bolts. To drop height you need longer bolts. I had to go with 8" bolts to get mine lower. Still up a bit. Proper measurements are made to frame. The AIM has the right dimensions.
 
The dimension that you are measuring, measures

Driver Front

28”

28”

Passenger Front

Driver Rear

28 9/16”

29”

Passenger Rear

 
PM me your email and I can send you page that relates to trim heights.
 
12" bolts are available, but they may create clearance issues
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Proper height for rear suspension

Posted: 6/24/10 5:39pmMessage 3 of 4
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Sebago Lake, ME - USA
Joined: 2/15/2007
Posts: 964
Vette(s): 1978 Silver Anniversary L82 4spd (M21) Red Leather. Pace Car is in the hands of a new caretaker.
I put the VBP spring on my '78. It came with the long bolts about 8". I only got about 3/8" - 1/2" tread showing below the lock nut. My wheel well edge measures about 28 1/4" with the stock 225/70 tires. Seems to look good sitting there. 
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Proper height for rear suspension

Posted: 6/25/10 9:56amMessage 4 of 4
V
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1034
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
We sell a lot of front springs to people who have recently installed a new rear spring.  The car settles a lot over 30 or 40 years, so when you get the rear to the proper height, you need to raise the front too.

Larry
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