Gear ratio for 438 cubic inch Buick Head Engine

c wells · 03-28-2009, 06:33 PM

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

it depends on tire rollout,rpm, and such. just guessing a 6.00 would be fine.

keith ohanesian · 05-16-2009, 01:39 PM

5.86 the 6.0s will buzz that big motor to much

c wells · 05-17-2009, 02:57 PM

Thanks for the info fellas i really appreciate it.

rayfin · 08-25-2009, 01:12 PM

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

4.33 should be good.1/4 mile.

Bill Baer · 09-09-2009, 10:02 PM

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.

03-28-2009, 06:33 PM	#1
c wells Junior Member Join Date: Mar 2009 Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	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.

05-11-2009, 07:11 AM	#2
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 22 Times in 22 Posts	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. __________________ don,t have one

05-16-2009, 01:39 PM	#3
keith ohanesian Member Join Date: Mar 2006 Posts: 392 Likes: 0 Liked 1 Time in 1 Post	Re: Gear ratio for 438 cubic inch Buick Head Engine 5.86 the 6.0s will buzz that big motor to much __________________ No prep is king

05-17-2009, 02:57 PM	#4
c wells Junior Member Join Date: Mar 2009 Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: Gear ratio for 438 cubic inch Buick Head Engine Thanks for the info fellas i really appreciate it.

08-25-2009, 01:12 PM	#5
rayfin Member Join Date: Mar 2009 Location: sioux city Posts: 134 Likes: 1 Liked 0 Times in 0 Posts	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?

09-01-2009, 08:28 PM	#6
skipper latino Junior Member Join Date: Dec 2008 Location: Donaldsonville La. Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: Gear ratio for 438 cubic inch Buick Head Engine 4.33 should be good.1/4 mile.

09-09-2009, 10:02 PM	#7
Bill Baer Senior Member Join Date: Jul 2007 Location: Nothern IL Posts: 596 Likes: 1 Liked 1 Time in 1 Post	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. __________________ Bill Baer 3391 SC, 339B SC, QR