Results 1 to 3 of 3

Thread: best way to determine a rear end gear ratio

  1. #1
    Senior Member MASTER BUILDER
    Join Date
    Mar 2008

    best way to determine a rear end gear ratio

    what is the formula for determining a rear end ratio. my buddies vega has 26 inch tires,4 speed muncie, and a 355 sbc. he says the cam is a circle track cam and makes power from 3500-about 8000 rpms, say he wanteed to be coming through the traps at about 7800 rpms, what would be the aprox ratio to obtain the desired rpm do i have enough specs to complete the formula thanks chevy art

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    You can use this formula EX: if the engine has enough HP to run 120 mph in the qtr.
    The gear ratio would be a 5.00 gear. But i'm thinking 4.88's or 4.86 gear would work best. Ofcourse if the HP is higher you'll need to go down on the gear.


  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    orland pk il

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 All Rights Reserved.

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