Wheel Spacers & Drag Racing
Printed From: TheAMCForum.com
Category: Competition
Forum Name: Drag Racing
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URL: https://theamcforum.com/forum/forum_posts.asp?TID=93111
Printed Date: Apr/16/2024 at 3:59am
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Topic: Wheel Spacers & Drag Racing
Posted By: Rebel Machine
Subject: Wheel Spacers & Drag Racing
Date Posted: Mar/17/2018 at 12:21pm
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On the surface it seems like a bad idea. Better the wheel contact the brake drum & axle flange than have another layer in between. I'm wanting to change to a 275 tire on my '69 AMX. The style of wheel I have is a 15"x8". I have two pairs, one with a 4.5" backspacing and another with 5.5". The 4.5" wheel pushes the current 255 tire outwards to where I wouldn't want it to go any further out. The 5.5" wheel brings in the same tire too close to the leaf spring which necessitates a 1/4" spacer. Ideally a 5" backspace wheel would be the ticket but they don't make one. Are there any pitfalls to drag racing with spacers on the drive wheels? -Steve- |
Replies:
Posted By: PROSTOCKTOM
Date Posted: Mar/17/2018 at 12:38pm
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So long as your studs are long enough to still allow the minimum thread engagement per NHRA rules. The same length as the diameter of the stud then I do not see why using a a 1/4" spacer is any problem. However I would use a spacer made of a billet aluminum or a steel spacer and not one made from a cast aluminum. Tom
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Posted By: Rebel Machine
Date Posted: Mar/17/2018 at 2:57pm
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Thanks for the advice. The other option would be to have the 4.5" wheel machined back to 5" but that would likely compromise the integrity of the wheel. -Steve- |
Posted By: amc67rogue
Date Posted: Mar/17/2018 at 4:15pm
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What is too close? ------------- Keith Coggins 67Rogue X code |
Posted By: Rebel Machine
Date Posted: Mar/18/2018 at 7:10am
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Touching. -Steve- |
Posted By: 69 SCRambler
Date Posted: Mar/26/2018 at 10:54am
| Perhaps roll the fender flanges over to gain additional clearance? |
Posted By: Rebel Machine
Date Posted: Mar/26/2018 at 4:28pm
The 5.5" backspace wheels put the tire against the leaf spring not the fender. -Steve- |
69 SCRambler wrote:Posted By: 70Javelin360
Date Posted: Mar/30/2018 at 5:38pm
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Ive seen 8 sec cars use spacers, its all about clamping force and flat surfaces. just like using a spacer on a flexplate or torque converter ------------- http://www.cardomain.com/ride/2431219 |
Posted By: RADAMX
Date Posted: Apr/04/2018 at 10:40am
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I have spacers on mine . I also have the 5/8 studs 1.36 60ft |
Posted By: Hurst390
Date Posted: Apr/04/2018 at 4:40pm
It might be hard to see but I have dual pattern wheels. I was gonna run 5/8 studs but just decided to run (10) 1/2" studs with 3/16 spacers  It has been 1.277 60 ft. best  ------------- SC/Hurst Rambler 11.62 120 100% Street Legal |