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How many rpm's will I tach at 122 mph?

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Old 04-09-2004, 06:42 PM
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Default How many rpm's will I tach at 122 mph?

I'm wondering how many rpm's I'll be taching at 122-123 mph in 4th gear? I currently have BFG dr's P255/16/50's on the back with a Moser 12 Bolt with 4.11's. I hope next weekend to try out my new setup at Atco N.J., Fred
Old 04-10-2004, 02:52 AM
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http://www.f-body.org/gears/

goto the above site it is great for figuring that stuff out
Old 04-10-2004, 06:04 AM
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My setup will have me turning 6500 rpm's in 4th at 123. Thanks for that site! Looks like 94 mph in 3rd at 6500. I think it's time for a shift light. Thanks again, Fred
Old 04-10-2004, 07:42 AM
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SHift light is your freind, The stock tach is wayyyy off with HEads cam and gears. 4th is the only gear where the stock tach was close to keeping up. I use the Harland shift light but you could check out the proform with the dial on back.




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