Results 1 to 4 of 4

Thread: 2nd Gen F-body - wheels and tires for NHRA/IHRA Stock class

  1. #1
    Senior Member SENIOR BUILDER
    Join Date
    Feb 2008
    Location
    Nineveh, Indiana
    Posts
    108

    2nd Gen F-body - wheels and tires for NHRA/IHRA Stock class

    I know most on here run either brackets or index style cars. I also am aware many are cars running stock suspensions. My project car is a 1979 Firebird (actually a 10th anniversery Trans Am). I'm building this car to run IHRA's crate motor stock class with a 350 330hp motor. It will have the Cal-tracs with the mono leaf springs for the suspension.

    Since there are a few of these cars out there. Thought I'd ask to avoid the pitfalls.

    First off, on the front of these cars, any special problems to look for as far as tire fit?

    How tall a front tire can you run?

    Can you use off the shelf wheels?

    Or are there any backspace problems I need to be aware of?

    The car has factory disc brakes on the front, now. Initially, I'm just going to rebuild the stock brakes (both front and rear) and use them. Down the road, I'll convert it over to something more liteweight. This will be one of those areas that can stand improvement, in both weight savings and performance.

    Next, rear wheels. Being an IHRA car, I know I can legally run 10.5 rear tires. I'm just going to go with 9 x 30's. I've not jacked it up to look but I've read that it's a pain to put 10" tires under these bodies. At some point, I may want to convert this car over to run NHRA legal stock.

    For 9" tires, use 15 x 8 wheels?

    What backspace does anyone recommend?

    The car has drum brakes on the rear. I am going to use the factory 10 bolt under the car. It's going to take a trip to Moser for axles, spool and a changeover to housing ends that do away with the c-clips. I've already spoken with them on this and have been informed as to what I need to do.

    While I'm asking, what about tire recommendations? Both front runners and slicks. I have been told by another stock class racer that radials are the way to go with an F-body?

    Thanks, any help will be appreciated,

    Robert Swartz
    Robert Swartz
    Swartz & Lane 1966 Chevy II
    Swartz & Lane 1979 Firebird H/CM
    You don't learn much when everything goes right.

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Apr 2009
    Location
    kingsport tn
    Posts
    1,735
    i yself dont know exact details but ive seen 70-81 f body's with 17-18" rubber with no big issues i sure others will know more exact sizes and off sets. but a nine inch wheel will fit with no issues and should work with factory offsets if you know some one ata local tire shop have the mount a 30x9.5 truck tire a ri and test fit heck even a 31x 10.5 as a "rough" idea if itll fit
    CRIMEDOG
    Sam Wood

  3. #3
    Senior Member SENIOR BUILDER
    Join Date
    Feb 2008
    Location
    Nineveh, Indiana
    Posts
    108
    Quote Originally Posted by dragonmaster093
    i yself dont know exact details but ive seen 70-81 f body's with 17-18" rubber with no big issues i sure others will know more exact sizes and off sets. but a nine inch wheel will fit with no issues and should work with factory offsets if you know some one ata local tire shop have the mount a 30x9.5 truck tire a ri and test fit heck even a 31x 10.5 as a "rough" idea if itll fit
    Thanks man,

    I had someone inform me that a 15x8/9 wheel with a 5 inch back spacing is the ticket for a 9" slick. I'm in the ballpark.
    Robert Swartz
    Swartz & Lane 1966 Chevy II
    Swartz & Lane 1979 Firebird H/CM
    You don't learn much when everything goes right.

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    Apr 2009
    Location
    kingsport tn
    Posts
    1,735
    no prob worked at few tire shops and had couple racing buddies that would com in and wed do that and also various rim types basically got paid to shoot the shit with buddies
    CRIMEDOG
    Sam Wood


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy