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4.8 turbo 65 f100 gearing

Old 01-25-2017, 08:48 PM
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Default 4.8 turbo 65 f100 gearing

hey guys i just want to say thanks for all you all do..and all the info here.
new to the fourm but read it a lot.

so this is what i got 1965 f100 swb with a 4.8 turbo swap 4l80 trans.. i would like to do this once lol..overall tire diameter is 29'' with this combo what gearing would be ideal? again thanks guys
Old 01-26-2017, 09:34 PM
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Turbos like load, so go higher than what you'd think for n/a. I'd consider a 3.25:1 gear, it'll load your engine and only turn 1975 @ 70 mph. A 3.50:1 gear will turn a bit more at 2125...
Old 01-26-2017, 10:14 PM
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thanks for the responce..will do i would not have guessed would have thought 4:10 for quick spool but want it to cruse well too...so ill order 3:50:1 are you famillar with these trucks at all by chance?


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