TheAMCForum.com Homepage
Forum Home Forum Home > Competition > Drag Racing
  New Posts New Posts RSS Feed - Wheel Spacers & Drag Racing
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Click for TheAMCForum Rules / Click for PDF version of Forum Rules
Your donations help keep this valuable resource free and growing. Thank you.

Wheel Spacers & Drag Racing

 Post Reply Post Reply
Author
Message
Rebel Machine View Drop Down
AMC Addicted
AMC Addicted


Joined: Jul/03/2007
Location: Western Il
Status: Offline
Points: 3913
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Topic: Wheel Spacers & Drag Racing
    Posted: Mar/17/2018 at 12:21pm
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-
Back to Top
PROSTOCKTOM View Drop Down
AMC Nut
AMC Nut
Avatar

Joined: Jun/20/2010
Location: Indiana
Status: Offline
Points: 361
Post Options Post Options   Thanks (0) Thanks(0)   Quote PROSTOCKTOM Quote  Post ReplyReply Direct Link To This Post Posted: Mar/17/2018 at 12:38pm
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
Back to Top
Rebel Machine View Drop Down
AMC Addicted
AMC Addicted


Joined: Jul/03/2007
Location: Western Il
Status: Offline
Points: 3913
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Mar/17/2018 at 2:57pm
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-

Back to Top
amc67rogue View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Nov/05/2008
Location: Phx. AZ.
Status: Offline
Points: 1531
Post Options Post Options   Thanks (0) Thanks(0)   Quote amc67rogue Quote  Post ReplyReply Direct Link To This Post Posted: Mar/17/2018 at 4:15pm
What is too close?
Keith Coggins 67Rogue X code
Back to Top
Rebel Machine View Drop Down
AMC Addicted
AMC Addicted


Joined: Jul/03/2007
Location: Western Il
Status: Offline
Points: 3913
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Mar/18/2018 at 7:10am
Touching.

-Steve-
Back to Top
69 SCRambler View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Mar/06/2013
Location: NJ
Status: Offline
Points: 29
Post Options Post Options   Thanks (0) Thanks(0)   Quote 69 SCRambler Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2018 at 10:54am
Perhaps roll the fender flanges over to gain additional clearance?
Back to Top
Rebel Machine View Drop Down
AMC Addicted
AMC Addicted


Joined: Jul/03/2007
Location: Western Il
Status: Offline
Points: 3913
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2018 at 4:28pm
Originally posted by 69 SCRambler 69 SCRambler wrote:

Perhaps roll the fender flanges over to gain additional clearance?


The 5.5" backspace wheels put the tire against the leaf spring not the fender.

-Steve-
Back to Top
70Javelin360 View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Feb/20/2008
Location: waukegan, il
Status: Offline
Points: 119
Post Options Post Options   Thanks (0) Thanks(0)   Quote 70Javelin360 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/30/2018 at 5:38pm
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
Back to Top
RADAMX View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Jul/09/2007
Location: Tucson Az.
Status: Offline
Points: 184
Post Options Post Options   Thanks (0) Thanks(0)   Quote RADAMX Quote  Post ReplyReply Direct Link To This Post Posted: Apr/04/2018 at 10:40am
I have spacers on mine . I also have the 5/8 studs
1.36 60ft
Back to Top
Hurst390 View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Apr/20/2008
Location: secret
Status: Offline
Points: 3766
Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurst390 Quote  Post ReplyReply Direct Link To This Post 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
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.078 seconds.
All content of this site Copyright © 2018 TheAMCForum unless otherwise noted, all rights reserved.
PROBLEMS LOGGING IN or REGISTERING:
If you have problems logging in or registering, then please contact a Moderator or