09-03-2024, 05:36 PM
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CC Member
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Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,741
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Not Ranked
OP, I think Joel may have the short way home for you if you guys have the same gearsets in your boxes. Spare Richmond parts are always good to have around. Depending on the different ratios Richmond offered, it is possible that you two may have a parts swap ability that will look more like a remove and replace.
I use a 2.73 R&P with a TKO (same as a TKX ratio-wise) that has the 0.82 overdrive. With a 295 x 55 rear tire 2000 rpm in fifth gear is right around 70 mph. Not as good as my BMW, but if I want that, then a 295 x 65 tire brings me in around 1850 rpm at 70 mph.
Be careful of too tall a gearing. If your idle is lumpy and does not smooth out until about 2000 rpm, then you want to be cautious about using top gears that drop you below 2000 rpm on the highway. On the other hand, if you have good low-speed engine torque, the RR trans and your 2.88 are a dream made in heaven.
One more follow-on thought: With the Tremec's 2.87 first gear (in both the TKO and TKX), even a 2.88 R&P will provide you with an 8.27 first gear, which makes for a pretty frisky first gear experience — something to consider?
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Last edited by eschaider; 09-09-2024 at 03:41 PM..
Reason: Spelling & Grammar
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