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Posted

Hi rod,

Accessing from the inside of what, the engine or the car?


actually i want to make a digital rpm indicator..........but dont hav enough knowledge abt car engine.....so without accessing the engine from inside
Posted

If you know the HorsePower(HP) and the Torque of it, you can also find the RPM  ;)

Horsepower =2 (pi) S T/33,000

S = shaft speed in r.p.m.
T = shaft torque in lb-ft (pound-feet)

From this u can get    S= 33,000HP/ 2(pi)T

BTW, 1 Horsepower = 745.7Watts

:) :) :)


Posted

Hi Ante,

Thx for reminding me about that. Here's more info. We're both correct in someway  ;D

* Mechanical horsepower

Posted

I think that car engines are classified as mechanical. Also, if u want to be more exact, it would be 0.74569987158227022 kW or just 745.69987158227022 Watts

Posted

I guess it’s like comparing a gallon (inp. vs US) they are not even close!

Or a ton vs a tonne and a ton!
Or short ton = 907.2kg vs metric ton = 1000.0000000000000kg how stupid is that?  ;D

I stay with metric like Europe; it’s much simpler this way! 8)
Or perhaps one day there is only 907mm on 1 meter!? ;D

  • 3 weeks later...

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