Bouncing rear
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,361
Likes: 2,872
From: Western Massachusetts
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2019 C2 of Year Finalist (stock)
2015 C2 of the Year Finalist
Bouncing rear
A Mechanic friend who does not work on a lot of C2's has a customer's 66 390 HP coupe in for strut rods, U joints, shock mounts and shocks. Put the car back together with new parts and the rear is bouncing as if the shocks are shot. Is there anything in the alignment possibly so far out the car won't stay on the road?
He's asking me, thinks because I have one I know everything.
Dan
He's asking me, thinks because I have one I know everything.
Dan
Burning Brakes
Joined: Oct 2004
Posts: 941
Likes: 160
From: Edmonton Alberta
Type of shocks? - are they too stiff or too soft.
Also the new strut rods may not be the correct ones for his car either. The bushings in the strut rods of later 70's vettes were of a slightly different size than the C2's and they could have been replaced easy enough with out the mechanic knowing.
Just my guess.
Did it have a wheel alignment?
65-StingRay
Also the new strut rods may not be the correct ones for his car either. The bushings in the strut rods of later 70's vettes were of a slightly different size than the C2's and they could have been replaced easy enough with out the mechanic knowing.
Just my guess.
Did it have a wheel alignment?
65-StingRay
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,361
Likes: 2,872
From: Western Massachusetts
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2019 C2 of Year Finalist (stock)
2015 C2 of the Year Finalist
Type of shocks? - are they too stiff or too soft.
Also the new strut rods may not be the correct ones for his car either. The bushings in the strut rods of later 70's vettes were of a slightly different size than the C2's and they could have been replaced easy enough with out the mechanic knowing.
Just my guess.
Did it have a wheel alignment?
65-StingRay
Also the new strut rods may not be the correct ones for his car either. The bushings in the strut rods of later 70's vettes were of a slightly different size than the C2's and they could have been replaced easy enough with out the mechanic knowing.
Just my guess.
Did it have a wheel alignment?
65-StingRay
Thanks, I told him I wouldn't try diagnosing this without first aligning it but he's a stubborn straight axle guy (restores GTO's for a living). I'll report back. Glad he's not working on my Corvette.
Dan
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,361
Likes: 2,872
From: Western Massachusetts
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2019 C2 of Year Finalist (stock)
2015 C2 of the Year Finalist
I saw the thread title and clicked on it and expected to see some of this:
https://www.youtube.com/watch?v=-QLRtefrS_8
My whole morning is ruined.
https://www.youtube.com/watch?v=-QLRtefrS_8
My whole morning is ruined.
I'll try more discretion in thread titles next time Frankie.
Dan
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
Thread Starter
Le Mans Master
Joined: Feb 2012
Posts: 5,361
Likes: 2,872
From: Western Massachusetts
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2019 C2 of Year Finalist (stock)
2015 C2 of the Year Finalist
If the production steel rear spring has been replaced with an aftermarket composite spring, they don't have any interleaf friction, and the rear suspension will have the "bouncy-bouncy" syndrome until the rear shocks are replaced with a pair specifically valved for tight rebound behavior. There is no other solution, short of putting a steel spring back on.
Dan
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Drifting
Joined: May 2013
Posts: 1,989
Likes: 455
From: Texas
John is correct as always but I have found that even a stock spring has more bounce than modern suspensions and was quite bothersome for me. I used Koni adjustable to control rebound but the QA-1's will do the job with much simpler adjustment.
Steve
Steve