Gears vs rpm and mph
Thread Starter
Supreme Member
Joined: Sep 2005
Posts: 1,818
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Car: ws6
Engine: ls1
Transmission: m6
Axle/Gears: 3.42
Gears vs rpm and mph
What rpms should an L98 car turn at 85 mph with 2.77's,3.27's,3.45's, and 3.70's? Does this chart look about right? Thanks
2.77- 85 mph @2400
3.27-85 mph @2600
3.45 85 mph @2800
3.73 85 mph @3000
2.77- 85 mph @2400
3.27-85 mph @2600
3.45 85 mph @2800
3.73 85 mph @3000
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iTrader: (1)
Joined: Mar 2005
Posts: 646
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From: San Antonio
Car: 1981 Camaro; 1986 Z28
Engine: LT1; LT1
Transmission: 6 speed; 6 speed
Axle/Gears: 3.73; 3.42
To answer your question, yes those look "fairly" accurate. You also have to consider tire/wheel size, actual gearing in rear, and torque convertor specs.
Supreme Member
Joined: Apr 2002
Posts: 4,627
Likes: 3
From: Southwest Florida
Car: projects.......
go to the TGO home page and click on "Equations". Plug your numbers in and you'll have the answers you need. Just remember that rpm vs speed by any calculation is only accurate for clutch cars, or with a locked converter.
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