Thread: One for the maths gurus

Originally Posted by Hall

The 4bb1 Isuzu manual that I have recently brought give the motor out put as 100 PS maximum . Now I`m thinking they are talking psi here. If that is the case. There must be a certain amount of force to produce the 100 psi. Ethier Kilowatts or horse power. So the question is what is the conversion for the amount of horse power or kilowatt to produce one psi ? All of the conversion charts I have looked at only convert in the same medium as in metric length to imperial length etc.
Cheers Hall

PS = horsepower. It is the abbreviation of "Pferdestärke" - which is quite literally horsepower in German.

EDIT _ IRC that PS is "metric" horsepower, and is a couple of % different to imperial horsepower. But your engine produces 73.5kW max.

Well butter my toast. How the hell did the Japs get to use a German abbreviation ? Ok it may be common enough, first time I have come across it though. As they say, you should never stop learning. That make it all so much easier. So 100 PS is 73.55 tyre smoking, stump pulling kilowatts of grunt.
Cheers Hall

Originally Posted by Hall

So 100 PS is 73.55 tyre smoking, stump pulling kilowatts of grunt.
Cheers Hall

No, the PS or kilowatts is for racing. Stump pulling is done by the torque. (which is an even more impressive figure.)

Originally Posted by vnx205

No, the PS or kilowatts is for racing. Stump pulling is done by the torque. (which is an even more impressive figure.)

Ahh, but the two are closely related. Torque ~ Power / rpm

PS is a term that was in favour for a while years ago. I haven't seen it used for quite a while, though.

No, the PS or kilowatts is for racing. Stump pulling is done by the torque.

and I know that 73.5 killer wasps ain`t all that fantastic, but the way it does pull I`m guessing that the torque is not to bad. Which you would expect being a ex truck motor. The next bit I would like to know about my donk is what torque it does have now that I know it has kick you back in your seat amount of kilowatts.
Cheers Hall

This is what that impeccable source of information, Wikipedia says.

The 4BD1 is a 3.9L direct injection diesel sold in Isuzu ELF trucks as well as marine and industrial applications from 1979. Power output was 66 kW, 245Nm. Also known in the US market as the QD100
Bore x Stroke 102 mm x 118 mm Displacement: 3856cc (235cid)
The 4BD1T is a turbocharged version of the 4BD1, it was produced from 1980 and was fitted to Isuzu NPR trucks from 1986 and sold in the US. Approx 100 kW, 330Nm

Originally Posted by vnx205

This is what that impeccable source of information, Wikipedia says.

The 4BD1 is a 3.9L direct injection diesel sold in Isuzu ELF trucks as well as marine and industrial applications from 1979. Power output was 66 kW, 245Nm. Also known in the US market as the QD100
Bore x Stroke 102 mm x 118 mm Displacement: 3856cc (235cid)
The 4BD1T is a turbocharged version of the 4BD1, it was produced from 1980 and was fitted to Isuzu NPR trucks from 1986 and sold in the US. Approx 100 kW, 330Nm

I think Dougal wrote that.