3.73 gears in Auto 'stang...what RPM at 80?
Shelby GT350 Member
Joined: March 11, 2004
Posts: 2,146
Likes: 1
By the magic of mathematics it calculates out to 2620 RPM @ 80 MPH (5th gear).
As a comparison with the stock 3.31 gear it calculates to 2325.
Disclaimer: The #'s will be off by a small amount as I've used the overall tire diameter, not the rolling diameter as I'm too lazy to search for the actual rolling diameter. In any case the difference +300 RPM will be very close to the real world. So go 80 MPH, look at your tach and then add 300 RPM to see what it will be with 3.73s.
As a comparison with the stock 3.31 gear it calculates to 2325.
Disclaimer: The #'s will be off by a small amount as I've used the overall tire diameter, not the rolling diameter as I'm too lazy to search for the actual rolling diameter. In any case the difference +300 RPM will be very close to the real world. So go 80 MPH, look at your tach and then add 300 RPM to see what it will be with 3.73s.
Thread Starter
V6 Member
Joined: November 17, 2004
Posts: 61
Likes: 0
thanks V10..
so, i guess around 2600-2700 for 80 mph...
do-able for a long distance drive? hmmm..probably so...
how much will it increase the 0-60 and 1/4 mile times for an auto '05 stang?
so, i guess around 2600-2700 for 80 mph...
do-able for a long distance drive? hmmm..probably so...
how much will it increase the 0-60 and 1/4 mile times for an auto '05 stang?
Originally posted by V10@March 18, 2005, 8:47 PM
By the magic of mathematics it calculates out to 2620 RPM @ 80 MPH (5th gear).
As a comparison with the stock 3.31 gear it calculates to 2325.
Disclaimer: The #'s will be off by a small amount as I've used the overall tire diameter, not the rolling diameter as I'm too lazy to search for the actual rolling diameter. In any case the difference +300 RPM will be very close to the real world. So go 80 MPH, look at your tach and then add 300 RPM to see what it will be with 3.73s.
By the magic of mathematics it calculates out to 2620 RPM @ 80 MPH (5th gear).
As a comparison with the stock 3.31 gear it calculates to 2325.
Disclaimer: The #'s will be off by a small amount as I've used the overall tire diameter, not the rolling diameter as I'm too lazy to search for the actual rolling diameter. In any case the difference +300 RPM will be very close to the real world. So go 80 MPH, look at your tach and then add 300 RPM to see what it will be with 3.73s.
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