front coil overs for C3
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
Burning Brakes
Joined: Apr 2007
Posts: 1,039
Likes: 62
From: Kona Hawaii
Proshocks
Anyone try a set of these Proshocks semi coilovers:
http://www.summitracing.com/parts/PFI-C200SR375/
http://www.summitracing.com/parts/PFI-C200SR375/
Race Director
Joined: Mar 2004
Posts: 12,634
Likes: 15
From: IL, Chicago area.
St. Jude Donor '14-'15-'16
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
when i bought mine the retards at QA-1 convinced me that their progressive 350 pound spring was correct for a certain front weight vehicle. I had been using the VB&P 550# for 20 years. Anyway my fenders would rub the front tires in a hard turn from body roll so I was glad to buy the 600# and later the 700#
Melting Slicks
Joined: Apr 2010
Posts: 2,794
Likes: 1,195
From: Canberra Australia
2025 C3 of the Year Finalist - Modified
Have to agree with gKull and PHPD7102 the SpeedDirect semi coilovers - using a combination of QA1 shocks and SpeedDirect springs, base etc are fantastic.
Got mine after chatting with gKull - he gave good advice, very happy.
Great adjustment, good ride and lots of spring rates available.
More pictures in my build thread.
http://www.australiancorvettes.com/p...=asc&start=870
Got mine after chatting with gKull - he gave good advice, very happy.
Great adjustment, good ride and lots of spring rates available.
More pictures in my build thread.
http://www.australiancorvettes.com/p...=asc&start=870
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Mar 2004
Posts: 12,634
Likes: 15
From: IL, Chicago area.
St. Jude Donor '14-'15-'16
Van Steel rocks as well. I have their rear coilover set up as Speed Direct didnt make a set up for the 1981 cars at the time. I love the coil overs and the car corners like its on rails.
Drifting
Joined: Jul 2002
Posts: 1,944
Likes: 20
From: The only Corvettes in Highett Victoria
Good write up.
[QUOTE=CraigH;1580469711]Have to agree with gKull and PHPD7102 the SpeedDirect semi coilovers - using a combination of QA1 shocks and SpeedDirect springs, base etc are fantastic.
Got mine after chatting with gKull - he gave good advice, very happy.
Great adjustment, good ride and lots of spring rates available.
Craig,
Nice write up on your car, and thanks for the nice words about the Borgeson box. I have one in my '74 and it really made a difference in the way it drives. Can't wait to see the car sometime.
Regards from Down Under.
aussiejohn
Got mine after chatting with gKull - he gave good advice, very happy.
Great adjustment, good ride and lots of spring rates available.
Craig,
Nice write up on your car, and thanks for the nice words about the Borgeson box. I have one in my '74 and it really made a difference in the way it drives. Can't wait to see the car sometime.
Regards from Down Under.
aussiejohn
Burning Brakes
Joined: Dec 2008
Posts: 971
Likes: 45
From: Middlesex NJ
Hey Guys with the coil overs....
It seems strange to me that the shock mount tabs in the lower control arm are strong enough to hold up the front end of the car? I understand how the spring pocket in the lower control arm can hold up to the spring pressure but it just seems that the shock absorber mounts points in the control arm would not be enough to hold up to the weight?
Has anyone seen any issues with stress or failures using the coil overs mounted to the shock mount as the only install point or do they come with some kind of insert to utilize the pocket for support?
Just wondering as I have never seen them close up.
Also, how does the upper portion mount in the upper frame pocket or is it relying on the upper shock mount as well to hold the weight of the car?
It seems strange to me that the shock mount tabs in the lower control arm are strong enough to hold up the front end of the car? I understand how the spring pocket in the lower control arm can hold up to the spring pressure but it just seems that the shock absorber mounts points in the control arm would not be enough to hold up to the weight?
Has anyone seen any issues with stress or failures using the coil overs mounted to the shock mount as the only install point or do they come with some kind of insert to utilize the pocket for support?
Just wondering as I have never seen them close up.
Also, how does the upper portion mount in the upper frame pocket or is it relying on the upper shock mount as well to hold the weight of the car?
Last edited by mysixtynine; Apr 6, 2012 at 10:19 AM. Reason: question on upper mountin
