Try rpm x tire diameter (in inches) divide by the gear ratio x 336. I believe
this will get you pretty close.
Doug Wilson
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From: ralph@cloverleaf-auto.com[SMTP:ralph@cloverleaf-auto.com]
Sent: Thursday, June 25, 1998 7:12 AM
To: vintage-race@autox.team.net
Subject: gear ratio
I can not find my "auto math handbook" and I do not remember who I lent it
to. So..... does any one out there remember the formula for calculating
road speed? I know it is a combination of tire size, engine rpm, final gear
ratio, but I can not remember the exact formula. That's why I have the book
that I loaned to person{s} unremembered!
Thanks Ralph
1939 SS100 {that we are changing gears in}
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