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Kirkham Motorsports

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Old 11-30-2020, 12:34 PM
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Join Date: Nov 2007
Location: Richardson, Tx
Cobra Make, Engine: Antique & Collectibles, Forte 427 SB, TKO 600
Posts: 201
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Default Anybody go from 3:55 rear gear to 3:08?

Yeah. Yeah.
I know. I know.
Typically people want to go lower in their gears but hear me out.....

Mike Forte built 427 stroker
TKO 600 w/.82 5th. gear
3:55 Ford 9" posi. (limited slip or whatever Ford calls it)
315/35/17 tire

Car is primarily street driven. Not a track beast.

Around 80 mph, I`m taching around 3K rpm`s.
(Second Strikes gearing calculator shows 77 mph)
At 75 mph, it`ll tach around 2500-2600

I`d like to drop a couple hundred RPM`s off those numbers.
And a rear gear swap is CONSIDERABLY cheaper than buying a new trans.

Going to a higher gear, I`m not too terribly worried about losing low end torque/power cause that motor has a lot of it under 4K rpm`s.

I don`t spend a lot of time at highway speed either BUT, it`d be nice to not have that engine turning that high for a long period of time.
My pumpkin is leaking anyways and if I have to pull it to re-seal it to the housing, why not swap gears?

My question is, has anybody done this? (Gone higher)
If so, were you happy, or did you swap it back?
Or should I say "F" it and leave it alone?
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