Calling all big brains. Every on line calculator says that given:

3.55 gears
28" tires
1:1 tranny ratio (3rd gear)


5600 rpm = 131.45 mph (at traps)

would said rpm always, always equal said mph unless there is slippage in the drive train?


Steve

 

Yes.

 

Yep, however, that isnt always the case when using juice.

I know you dont use it, but their are variables that have to be added. Its best to do the averaging yourself based off prior timeslips, if possible.

 

****, why would juice make your said rpm not equal your said mph?

 

From my own personal experience using nitrous with a set of 4.30 gears in my cobra.. i realized how quickly i ran out of gear at the track with it. I had to step down to 4.10 gears because of it.When i stopped using juice, i stepped up from 4.10 to 4.56.

I have no idea in hell why its screws with the torque multiplication of mph/rpm, but it does. I think Sal or Jim were running 4.10's and ran out of gear using it to and stepped back down.

 

Slippage in the torque converter will make a difference between reality and theoretical MPH, the more Torque that you are making the greater the slippage. This is as I understand it. I'm not a tranny guy, but Greg Evans would know for sure.