Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

Arragonis · 08-02-2010, 02:18 PM

There are probably better replies but HP is a mathematical thing, a measure of work done whereas torque is a measure of 'twist'. The formula is something like

(torque (lb/ft) * rpm) / 5252

I'm not sure about the hp readings from the SG2 as I've had mine 48 hours now

If you want to swap then you need also to match the rev range of the engine to your gearing and weight - maybe an axle swap or something. My TDI has 30 mph/1000 in top but the car is very light (for a modern car that is, its still too heavy IMHO).

I'm not sure how electric motors work in terms of rpm, torque and efficiency except they make max torque from stop. But I'm keen to learn more so I will watch other replies.

08-02-2010, 02:18 PM	#2 (permalink)
Arragonis The PRC. Join Date: Oct 2009 Location: Elsewhere. Posts: 5,304 Thanks: 285 Thanked 536 Times in 384 Posts	There are probably better replies but HP is a mathematical thing, a measure of work done whereas torque is a measure of 'twist'. The formula is something like (torque (lb/ft) * rpm) / 5252 I'm not sure about the hp readings from the SG2 as I've had mine 48 hours now If you want to swap then you need also to match the rev range of the engine to your gearing and weight - maybe an axle swap or something. My TDI has 30 mph/1000 in top but the car is very light (for a modern car that is, its still too heavy IMHO). I'm not sure how electric motors work in terms of rpm, torque and efficiency except they make max torque from stop. But I'm keen to learn more so I will watch other replies. __________________ [I]So long and thanks for all the fish.[/I]