Suspension height adjust with 18" square set up
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Instructor
Joined: Apr 2019
Posts: 165
Likes: 56
From: Raleigh, NC
Suspension height adjust with 18" square set up
Have an '03 Z06 that I ocassionally track at VIR. Previous owner dropped the car all the way down on factory bolts with factory sized tires (the rubbers below the leaf springs are still in place). Car had no rake and experienced front lift around 120 mph and up. I raised the front 0.75" and the rear 1.25" That eliminated the problem.
I now have 295/35 18s all the way around, which raised the front end 0.4". I wanted to lower the front in order to retain the rake. I was only able to turn the front bolts 2.5 turns counter clockwise before they bottomed.
From what I have read, a car dropped all the way down on factory bolts, will have poor handling due to suspension bottoming. If the front bolts are 1/2 turn from bottom, and the factory rubbers are still in place, is that too low for proper suspension function? Any idea what the range would be to still retain decent handling (ie, 2, 3, 6 turns of bolt from bottom)?
My other option would be to raise the front back to where I had it, then raise the rear to get the rake back.
Thanks for input!
I now have 295/35 18s all the way around, which raised the front end 0.4". I wanted to lower the front in order to retain the rake. I was only able to turn the front bolts 2.5 turns counter clockwise before they bottomed.
From what I have read, a car dropped all the way down on factory bolts, will have poor handling due to suspension bottoming. If the front bolts are 1/2 turn from bottom, and the factory rubbers are still in place, is that too low for proper suspension function? Any idea what the range would be to still retain decent handling (ie, 2, 3, 6 turns of bolt from bottom)?
My other option would be to raise the front back to where I had it, then raise the rear to get the rake back.
Thanks for input!
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
Have an '03 Z06 that I ocassionally track at VIR. Previous owner dropped the car all the way down on factory bolts with factory sized tires (the rubbers below the leaf springs are still in place). Car had no rake and experienced front lift around 120 mph and up. I raised the front 0.75" and the rear 1.25" That eliminated the problem.
I now have 295/35 18s all the way around, which raised the front end 0.4". I wanted to lower the front in order to retain the rake. I was only able to turn the front bolts 2.5 turns counter clockwise before they bottomed.
From what I have read, a car dropped all the way down on factory bolts, will have poor handling due to suspension bottoming. If the front bolts are 1/2 turn from bottom, and the factory rubbers are still in place, is that too low for proper suspension function? Any idea what the range would be to still retain decent handling (ie, 2, 3, 6 turns of bolt from bottom)?
My other option would be to raise the front back to where I had it, then raise the rear to get the rake back.
Thanks for input!
I now have 295/35 18s all the way around, which raised the front end 0.4". I wanted to lower the front in order to retain the rake. I was only able to turn the front bolts 2.5 turns counter clockwise before they bottomed.
From what I have read, a car dropped all the way down on factory bolts, will have poor handling due to suspension bottoming. If the front bolts are 1/2 turn from bottom, and the factory rubbers are still in place, is that too low for proper suspension function? Any idea what the range would be to still retain decent handling (ie, 2, 3, 6 turns of bolt from bottom)?
My other option would be to raise the front back to where I had it, then raise the rear to get the rake back.
Thanks for input!
