Math wiz needed for figuring torque

[John Berger]

I ordered the G-Tech porta-dyno from Geno's. It should arrive on Thursday. Given the HP numbers what is the formula for calculating torque? The G-tech does not do that as far as I know. TIA

 

[csutton7]

I think this formula will get you close----HP x 2. 14 or 2. 15... ... . chris

 

[Archive]

Chris is correct... I read this about a year or so ago... HP x 2. 14 will get ya very close.

 

[RustyJC]

The pure formula is:



BHP = (Torque x RPM)/5252



Solving for Torque:



Torque = (BHP x 5252)/RPM



Therefore, if you use a factor of 2. 14 to convert BHP to torque, you assume that the BHP reading was taken at 2454 RPM (5252/2. 14). Personally, instead of using a universal fudge factor of 2. 14, I'd try to get an instantaneous tach reading of RPM to go with an instantaneous BHP reading and plug it in the formula above if I wanted an accurate torque measurement. If, on the other hand, all the G-Tech gives you is one average BHP reading for the "pull", I'd make the pull in one gear, then average the starting and ending RPM for the "pull" and use that number in the formula above.



Just my humble 2 cents worth.



Rusty