Is there a way to tell from the build sheet what axle ratio my R-1 Avanti (with auto) has?
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Rear Axle: Is there a way to tell....
63 Avanti R1 2788
1914 Stutz Bearcat
(George Barris replica)
Washington StateTags: None
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Originally posted by Mark57 View PostJohn - In my experience with several Production Orders, the axle ratio is printed right on the PO under the "Axle Ratio".
Honest....
Originally posted by PackardV8 View PostChances are, it was built with a 3.73. Forty-eight years later, could be anything. Why not just put it on a hoist and count the driveshaft vs. wheel revs? Takes less than five minutes.
jack vines63 Avanti R1 2788
1914 Stutz Bearcat
(George Barris replica)
Washington State
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John
Take it out on the highway with your GPS and run at a fixed speed. Record RPM and speed, when you return home measure rear tire diameter and plug them into the speed/gear ratio equations on the internet. With the final drive at 1:1 the only unsolved variable is rear ratio.
I know!!!! No Gps
Bob
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Originally posted by JBOYLE View PostNo hoist...1964 GT Hawk
PSMCDR 2014
Best time: 14.473 sec. 96.57 MPH quarter mile
PSMCDR 2013
Best time: 14.654 sec. 94.53 MPH quarter
Victoria, Canada
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Many of those tags have been lost over the years.
I do as Jack suggests; jack it up, rotate the tires and compare revolutions to revolutions of driveshaft.Brad Johnson,
SDC since 1975, ASC since 1990
Pine Grove Mills, Pa.
'33 Rockne 10, '51 Commander Starlight. '53 Commander Starlight
'56 Sky Hawk in process
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Gotta Jack? use it to lift one wheel. With the other three wheels blocked and the transmission in neutral, mark a chalk mark on the drive shaft and on the wheel. You count the revs of the drive shaft while someone turns the wheel one revolution. Divide by two for the ratio.
Don't tell me, you got TwinTraction too. in that case wait till you get money.
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