The Ford Barn

52merc · 09-30-2012, 05:56 PM

ok here we go.....276ci enginexmanual 3speed with o/d x3.54 rear x215x75x15 tires will i be able to use o/d without slogging the engine thanks

my4dv8 · 09-30-2012, 07:00 PM

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Well, I failed school Maths, but if your o/d is .8 over that will make your final drive 2.8 in top gear.
So 2.8 (ratio) x 60 mph x 366( constant) =61488 divided by tire dia. 27.7 in. Unless you've been doing skids. Would give you and rpm at 60 mph 2219 rpm.

09-30-2012, 05:56 PM	#1
52merc Senior Member Join Date: May 2010 Location: new zealand Posts: 1,054	ratio ok here we go.....276ci enginexmanual 3speed with o/d x3.54 rear x215x75x15 tires will i be able to use o/d without slogging the engine thanks

09-30-2012, 07:00 PM	#2
my4dv8 Senior Member Join Date: Aug 2010 Location: New Zealand Posts: 1,111	Re: ratio Sponsored Links (Register now to hide all advertisements) Well, I failed school Maths, but if your o/d is .8 over that will make your final drive 2.8 in top gear. So 2.8 (ratio) x 60 mph x 366( constant) =61488 divided by tire dia. 27.7 in. Unless you've been doing skids. Would give you and rpm at 60 mph 2219 rpm.