Old 01-14-2021, 09:58 PM
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Chief of the 60's Chief of the 60's is offline
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Originally Posted by JLMounce View Post
Technically speaking, unless you’re running a lockup converter, your DS rpm will still be less than engine RPM due to torque converter slippage, even if your final is 1:1

But that’s splitting hairs of course.
Not necessarily.

A healthy dose of reality never killed anybody. But if it hurts your feelings, perhaps knitting is your forté.

Originally Posted by The Champ View Post
I rarely agree with Chief on anything but...........
Old 01-14-2021, 10:06 PM
JLMounce JLMounce is offline
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I guess if you're on the limit, knowing your slippage across the line would really be necessary. Or calculate backwards from mph and gear ratio to get true shaft rpm.

1969 Pontiac Firebird
Old 01-15-2021, 09:27 AM
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AG AG is offline
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Originally Posted by Chief of the 60's View Post
Just curious. Some do not. That, obviously effects flywheel RPM vs. tail shaft RPM. That effects driveshaft RPM
My converter slips 6.8% across the line so my driveshaft rpm will be slightly lower than flywheel rpm.

1967 Firechicken, 461, Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3520#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.

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