Drag Racing Alignment Specs
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,687
Likes: 86
From: De Pere, WI
Drag Racing Alignment Specs
Anyone know of a good set of alignment specs for the C5? Looking to have mine aligned next week and it will not be with the factory specs. Need to be able to plant the rear tires as much as possible going straight and not so much cornering since its on big-n-skinnies.
Racer
Joined: Nov 2017
Posts: 449
Likes: 158
From: Aiken, SC
Are you on stock bushings still? I had mine aligned to factory specs with about 200 pounds of weight in the back to simulate squat. More weight would have been ideal, but its been working great for me on a bias ply
Safety Car
Joined: Aug 2011
Posts: 4,449
Likes: 409
From: Portland OR
I aksed this question years ago in the perf section when all sorts of folks were drag racing C5’s. Fell on deaf ears.
I can see on my ET Street R’s that the insides are wearing more than the outsides. Which says too much negative camber. And of course that increases with squat. Not sure how much.
The other thing these do, is toe in at launch due to the tires trying to pass the car. And that’s the control arm bushings squishing.
I’d imagine you can fix some of this with alignment. But I can picture an all out drag race alignment being evil handling for normal driving. 😊
I don’t drag mine much anymore, and it works fine as is, IF and only IF the track has great prep.
Ron
I can see on my ET Street R’s that the insides are wearing more than the outsides. Which says too much negative camber. And of course that increases with squat. Not sure how much.
The other thing these do, is toe in at launch due to the tires trying to pass the car. And that’s the control arm bushings squishing.
I’d imagine you can fix some of this with alignment. But I can picture an all out drag race alignment being evil handling for normal driving. 😊
I don’t drag mine much anymore, and it works fine as is, IF and only IF the track has great prep.
Ron
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,687
Likes: 86
From: De Pere, WI
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,687
Likes: 86
From: De Pere, WI
I aksed this question years ago in the perf section when all sorts of folks were drag racing C5’s. Fell on deaf ears.
I can see on my ET Street R’s that the insides are wearing more than the outsides. Which says too much negative camber. And of course that increases with squat. Not sure how much.
The other thing these do, is toe in at launch due to the tires trying to pass the car. And that’s the control arm bushings squishing.
I’d imagine you can fix some of this with alignment. But I can picture an all out drag race alignment being evil handling for normal driving. 😊
I don’t drag mine much anymore, and it works fine as is, IF and only IF the track has great prep.
Ron
I can see on my ET Street R’s that the insides are wearing more than the outsides. Which says too much negative camber. And of course that increases with squat. Not sure how much.
The other thing these do, is toe in at launch due to the tires trying to pass the car. And that’s the control arm bushings squishing.
I’d imagine you can fix some of this with alignment. But I can picture an all out drag race alignment being evil handling for normal driving. 😊
I don’t drag mine much anymore, and it works fine as is, IF and only IF the track has great prep.
Ron
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AMP Racing
Joined: Aug 2006
Posts: 10,756
Likes: 589
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Reach out to George at Fark’s Supercars. They’ve drag raced an IRS car for a long time - though it is now a solid axle setup. They do a lot of race car chassis setup stuff.
DBN on here is an IRS guru as well, but he doesn’t come on here much. Occasionally in the drag race section.
Best of success to you!
DBN on here is an IRS guru as well, but he doesn’t come on here much. Occasionally in the drag race section.
Best of success to you!
Racer
Joined: Nov 2017
Posts: 449
Likes: 158
From: Aiken, SC
The bushings definitely help the deflection on the hit. Like Ron said, my Street Rs show the wear on the inside edge also although it has evened out and not gotten any worse since I had the car aligned. I'm on stock bushings still though.
What clutch are you running? Radial and manual at that power level is asking to leave drivetrain parts on the track. And if you run a bias I feel like the alignment isn't quite as important as it is on a radial as long as the car is going straight because of how much the tire itself will deflect.
What clutch are you running? Radial and manual at that power level is asking to leave drivetrain parts on the track. And if you run a bias I feel like the alignment isn't quite as important as it is on a radial as long as the car is going straight because of how much the tire itself will deflect.