racers wanted
Racer
Joined: Nov 2016
Posts: 316
Likes: 72
From: Bala Cynwyd PA
I'm not a racer, but I installed five hundred pound Springs and qa1 single adjustable shocks in my 72. At first I had to modify the lower control arm by grinding out a section for the adjuster **** to fit through the arm. After driving for a while I removed the lower a arm to install new bushings. I noticed that the upper part of the shock mount was scuffed. It was rubbing against the hole in the control arm when compressed. So I had to modify the upper control arm as well for the shock to clear.
Scott
Scott
Drifting
Joined: Nov 2007
Posts: 1,695
Likes: 270
From: New York
Maybe consider th is in the Autocrossing & Roadracing - CorvetteForum - Chevrolet Corvette Forum Discussion section
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I have the QA1 dual adjustable and a very light weight front end 42% front weight bias on my just over 3000 lbs vette per rule book. For track days I fluctuated between 650 and 700 # speed direct springs. My local buddy with his heavy 3300 lbs BBC historic SCCA GT1 was running 800#. Speed direct springs weigh less and were cheaper than QA 1 conical
My rears are QA1 dual adjust with 520# mono spring. A smarter person would have just done the rear coil overs. But I just had to cut how much money I was investing on a road racing budget that only gave you little trophies. I was the class champ two years and for $10,000 per year in tires, brake rotors/pads, and entry fees my end of the year trophy was maybe 100 bucks
My rears are QA1 dual adjust with 520# mono spring. A smarter person would have just done the rear coil overs. But I just had to cut how much money I was investing on a road racing budget that only gave you little trophies. I was the class champ two years and for $10,000 per year in tires, brake rotors/pads, and entry fees my end of the year trophy was maybe 100 bucks
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I think that this is model that I got and changed out the springs and collars for speed direct blue springs. I drove around with 550's VB&P one inch shorter since the 80's and even replaced them once because I thought that they were sagging from age. So when I called QA-1 they have a formula for front end weight. I have NO idea how they came up with their weight formula telling me that a sub 1500 lbs front end could only use a 450 pound spring.
You can call summit tech support and they can look up different spring weight or get the spring part numbers from QA1
https://www.summitracing.com/parts/q...=true#overview
Aluminum hat wilwood grand nation calipers and rotors. They require minimum of 17 inch wheels for heavy road racing cars. 3 inch air ducting.
You can call summit tech support and they can look up different spring weight or get the spring part numbers from QA1
https://www.summitracing.com/parts/q...=true#overview
Aluminum hat wilwood grand nation calipers and rotors. They require minimum of 17 inch wheels for heavy road racing cars. 3 inch air ducting.
Last edited by gkull; Dec 21, 2023 at 12:48 PM.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
QA-1's are so nice with the dual adjustable. I can turn them up for ride height street driving and down for track days. Oh, I forgot to say that many years ago I installed a bump steer kit so my camber has very little change on vertical up and down front end movement. heavy springs also limit it to a couple of inches under braking.
Just after repairing the front end from a track day. I don't have the headlight covers on yet. 1981 daytona front end fiber glass kit that took 150 pounds off the front end. No grills and the front air ducting scoops installed
Just after repairing the front end from a track day. I don't have the headlight covers on yet. 1981 daytona front end fiber glass kit that took 150 pounds off the front end. No grills and the front air ducting scoops installed
Last edited by gkull; Dec 21, 2023 at 09:31 PM.
Thread Starter
Safety Car
Joined: Dec 2012
Posts: 3,974
Likes: 673
nice
QA-1's are so nice with the dual adjustable. I can turn them up for ride height street driving and down for track days.
Just after repairing the front end from a track day. I don't have the headlight covers on yet. 1981 daytona front end fiber glass kit that took 150 pounds off the front end. No grills and the front air ducting scoops installed
Just after repairing the front end from a track day. I don't have the headlight covers on yet. 1981 daytona front end fiber glass kit that took 150 pounds off the front end. No grills and the front air ducting scoops installed
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Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Doing the fiber glass work at home. The front air dams ride right down on the road under the radiator to keep air out from under the car and make water cooling better.
Power steering dripping again. Even with power steering 10X11 cooler radiator. I've done the control valve and power steering pump even with pulley ratios many times because of 295 front road racing slicks. Shifting many times around a track at 7500 rpm you have to think about water pump, alternator, power steering rpm
Power steering dripping again. Even with power steering 10X11 cooler radiator. I've done the control valve and power steering pump even with pulley ratios many times because of 295 front road racing slicks. Shifting many times around a track at 7500 rpm you have to think about water pump, alternator, power steering rpm
Last edited by gkull; Dec 21, 2023 at 09:51 PM.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Team Owner
Joined: Sep 2002
Posts: 38,289
Likes: 2,065
From: California
i have it apart currently my race car C2, as dropping in the new aluminum Gen 1 Small Block. Will probaby go lighter on the front springs, as hardly track run it anymore. I was attempting to dial in the rear with the coilovers last out. I Canyon run it, but will operate on the street for short trips. I have the rear lightened a bunch to, but need to scale the car when I get finished. I was last around 2850.
My C3 not coilover, runs 550 cut springs front and old Koni Double Adjust D's, rear a Guldstrand short bottom leaf, with a Daytona stack and the old Koni Double Adjust Ds.
My other C2 not coilover, just 550 springs, with 7 leaf F-41 and street Orange Konis.
So on the coilover car- I like to go super stiff in the front, anti-dive under heavy braking, skips over road undulations, can aim it pretty good. The rear, trying to balance grip and tracking, running softer.
Just attempting to use what I have, and not go on a spending spree.
My C3 not coilover, runs 550 cut springs front and old Koni Double Adjust D's, rear a Guldstrand short bottom leaf, with a Daytona stack and the old Koni Double Adjust Ds.
My other C2 not coilover, just 550 springs, with 7 leaf F-41 and street Orange Konis.
So on the coilover car- I like to go super stiff in the front, anti-dive under heavy braking, skips over road undulations, can aim it pretty good. The rear, trying to balance grip and tracking, running softer.
Just attempting to use what I have, and not go on a spending spree.
Last edited by TCracingCA; Dec 24, 2023 at 03:53 PM.