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Old 12-01-2020, 03:09 PM
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xb-60 xb-60 is offline
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Join Date: Aug 2009
Location: Adelaide, SA
Cobra Make, Engine: AP 289FIA 'English' spec.
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Quote:
Originally Posted by H-Rod View Post
....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.....
Sounds like you're confident that your engine can handle the taller rear end well enough. You have a five speed gearbox and a big torquey V8, so no big deal if you feel the need to change down a gear or two to power past other vehicles on the open road.


Cheers!
Glen
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