HConverting Japaneese HP to English HP

Disscussing old, rare, very specific or otherwise uncommon units and measurements
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HConverting Japaneese HP to English HP

Postby Foxmike » Thu Jan 06, 2005 10:23 pm

The Japaneese use a differnt method of rating HP then do the Americans. What is the conversion table for it?

Postby Guest » Thu Apr 14, 2005 9:15 pm

I'm not sure what you are asking. There may be a difference in the test conditions, which actually lead to a difference in engine output under different conditions. I'm not sure about the specified conditions.

There are also different definitions of how much work a horsepower is. The inch-pound definition is based on 550 ft-lbs/sec, 745.6999 W.

There is a "metric horsepower," called cheval-vapeur (steam horse??) in France, Pferdestärke in Germany. It is 735.4988 W. Perhaps the Japanese use it too.

As American, European, and Japanese car manufacturers are all fully metric, and only do "soft Imperial" to satisfy customers, I'd ask the manufacturer for engine output in kilowatts, and ask for the RPM, temperature, barometric pressure, and fuel specs. That would be consistent with SAE test procedures.

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