Competition Top speed formula?

[KatDiesel]

Anyone have a handy formula for calculating top speed?



I need to start seeing where the brick wall will hit me speed wise due to my gear ratio.

 

[E7mack96]

MPH = TIRE RADIUS ÷ 168 X ENGINE RPM ÷ GEAR RATIO





Note: Tire Radius is distance, in inches, from center of tire to ground.

Note: Gear Ratio is Rear Axle ratio multiplied by Transmission Gear ratio.

Example: What MPH at 6500 RPM with a 4. 9 rear axle and 14 inch radius tire in 4th (1:1) gear?



MPH = 14 ÷ 168 x 6500 ÷ 4. 90 ÷ 1 = 111 MPH



Courtesy of Edelbrock

 

[HeberRam]

Top Speed???

Kat... don't know exactly what your looking for, but try this link:http://www.4lo.com/



Its got cool stuff... . At May Madness it will help with blood alcohol stuff. .



Steve

 

[Diesel Freak]

FYI... with 315's, 3. 54's and in 6th... . 3000RPM is right about 120.

 

[Jim Fulmer]

Kat, www.prestage.com is pretty good info!



Jim

 

[Idaho CTD]

Dang Cliff

285's, 3. 54, in 6th @ 2900 is only 110. I guess I need bigger tires.