[Q]Unit measurement of power

[kk9972]

Hi All master here,
I would like to comparewhat what is the different between HP and BHP, bar and PSI.
It makes me confuse some of the time. Does anyone know?

 

[huakenny]

HP = Horsepower
BHP= Brake horsepower

any u can try to google it around to get the meaning.....i just lazy to refer bc my notes for the explanation...hehe

 

[emechelmi]

HP is general measurement of power. BHP is measured by applying a resistance (brake) to an engine until it ceases to run. 1 HP is equivalent to 746 W in metric system.

bar and PSI are the unit to measure pressure, not power. One is a metric and the other is imperial. 1 bar refers to 100 kN/m2 or 100kPa. PSI (pound per square inch) comes from Imperial unit system.

 

[kk9972]

Hi emechemil,
Thanks for the explaination.
So, HP is generate measurement being calculated from engine output (watt)? Is it? BHP is the way by deducting the resistances to get the actual power?
Example, 160 BHP is more power compare to 160 HP?

Bar and PSI, pressure measurement. This thing confuses me a lot with the boost meter with offering PSI or Bar reading. So, in this case, if I boosted at 0.7 bar, what is the reading in boost with offers PSi reading?

Thanks for the help in advance.

 

[ehaab]

http://en.wikipedia.org/wiki/Horsepower

Wiki rules...use it to answer all ur questions..

 

[Fluffy]

haha agreed! wiki rox.

 

[zan]

HP is general measurement of power. BHP is measured by applying a resistance (brake) to an engine until it ceases to run. 1 HP is equivalent to 746 W in metric system.

bar and PSI are the unit to measure pressure, not power. One is a metric and the other is imperial. 1 bar refers to 100 kN/m2 or 100kPa. PSI (pound per square inch) comes from Imperial unit system.

yeah, to make things easier and faster - use wiki!

but the quote above is correct though.

HP is measured at engine's crank pully which is the power supplier like a horse.
BHP is measured at the wheel; where the brake is located - hence the acronym of 'brake horse power.'

 

[Boink Boink]

my notes says

1 bar - 14.5 psi .......... standard rule of thumb. rounded up.

 

[kk9972]

Share with you guys

Thanks for you guys reply. I got the ideal now. cool~:shades_smile:

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http://www.citroen.co.uk/conversion/c_converter_rates.asp?pagetype=c_converter_rates

Just found this useful unit conversion table from Net. Quite useful for me.

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