Originally Posted by chip-3door
Originally Posted by 89XR2
Originally Posted by chip-3door
Originally Posted by 89XR2
Chip, what is the magic 5252 number in that equation?
The figure that converts between lbft and bhp against rpm mate.
Ah, so it's just a number in an equation then and doesnt actually relate to 5252 rpm or anything like that.
Well, yes and no.
It IS just a number in an equation, but it implictly defines the cross over the point for torque and horsepower in lbft and BHP.
If you quote in NM and PS you get a different number, and hence a different crossover point.
5252 is the point in the RPM range when ALL engines will have the same power and torque if they are quoted in lbft and bhp
So following on from that using my earlier f1 engine as an example at 5252 rpm the f1 engine would in theory only be making 270bhp. That's quite a strange concept to get your head around but it makes complete sense as peak bhp on an f1 engine must be around the 17k mark so the engine has another 12k roughly to make the extra 700 bhp.
Where could I read all about this stuff as it fascinates me. I've only really started to get into the ins and outs of engines in the last year since I had to rebuild my 2 stroke mx bike engine. And realised I didnt actually understand how engines make power etc etc.