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-   -   Gear ratio for 438 cubic inch Buick Head Engine (https://classracer.com/classforum/showthread.php?t=16714)

c wells 03-28-2009 06:33 PM
Gear ratio for 438 cubic inch Buick Head Engine
 
I have an 438 inch Dart Buick Head Engine with a powerglide. The car weighs 3000 lbs. I am new to this type of engine I was wondering do anyone have any suggestions on what gear ratio i should run i have a 9 inch ford.

randy wilson 05-11-2009 07:11 AM
Re: Gear ratio for 438 cubic inch Buick Head Engine
 
it depends on tire rollout,rpm, and such. just guessing a 6.00 would be fine.

keith ohanesian 05-16-2009 01:39 PM
Re: Gear ratio for 438 cubic inch Buick Head Engine
 
5.86 the 6.0s will buzz that big motor to much

c wells 05-17-2009 02:57 PM
Re: Gear ratio for 438 cubic inch Buick Head Engine
 
Thanks for the info fellas i really appreciate it.

rayfin 08-25-2009 01:12 PM
Re: Gear ratio for 438 cubic inch Buick Head Engine
 
1/4 mile or 1/8 mile? How many rpm do you want to be turning at the end? How tall are the rear tires?

skipper latino 09-01-2009 08:28 PM
Re: Gear ratio for 438 cubic inch Buick Head Engine
 
4.33 should be good.1/4 mile.

Bill Baer 09-09-2009 10:02 PM
Re: Gear ratio for 438 cubic inch Buick Head Engine
 
If you want to do the math here's the web site with the formulas.
http://www.golenengineservice.com/html/calculators.html
If you running an automatic allow 5-10% for converter slipage.


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