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Old 03-28-2009, 06:33 PM   #1
c wells
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Default 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.
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Old 05-11-2009, 07:11 AM   #2
randy wilson
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Default 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.
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Old 05-16-2009, 01:39 PM   #3
keith ohanesian
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Default Re: Gear ratio for 438 cubic inch Buick Head Engine

5.86 the 6.0s will buzz that big motor to much
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Old 05-17-2009, 02:57 PM   #4
c wells
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Default Re: Gear ratio for 438 cubic inch Buick Head Engine

Thanks for the info fellas i really appreciate it.
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Old 08-25-2009, 01:12 PM   #5
rayfin
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Default 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?
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Old 09-01-2009, 08:28 PM   #6
skipper latino
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Default Re: Gear ratio for 438 cubic inch Buick Head Engine

4.33 should be good.1/4 mile.
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Old 09-09-2009, 10:02 PM   #7
Bill Baer
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Default 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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