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Author Topic: 69 12 Bolt with 411 gears  (Read 452 times)
69z28302
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« on: October 29, 2011, 11:16:02 PM »
I was going to change the gears in 69 and was wondering with a E-70-15 tire what RPM the engine would turn at 55 MPH and 70 MPH with a 4.11 ratio.

Thanks CRG

Mike
« Last Edit: October 29, 2011, 11:32:48 PM by 69z28302 » Logged
JohnZ
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« Reply #1 on: October 30, 2011, 11:55:46 AM »
About 2900 at 55, and 3700 at 70 (E70-15 tire is 26.4" in diameter).
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'69 Z/28
Fathom Green
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MyRed67
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« Reply #2 on: October 30, 2011, 02:59:36 PM »
JohnZ;  can you tell me what RPM's I can expect with 255R60 X 15 tires and 4:11 gears at 55 mph and 70 mph?  Thanks!
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1967 Camaro  LOS  11A
Mike
tmodel66
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« Reply #3 on: October 30, 2011, 03:48:49 PM »
Around 2800 at 55 and 3550 at 70.  Diameter is 27.1
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Daniel  
'69 SS 350/4 speed  Fathom Green--POP
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