CC to HP Conversion Formulas for Small Engines

I gave Red a good answer for 3 words and a comma. This is indeed the most correct answer possible. CC and Hp are only related when type of engine is known (say 2 or 4 stroke), the RPM, the fuel etc...

And there's been at least one thread on the subject recently.

CC is for displacement (cubic centimeters)

HP is for horsepower

It's a better idea to conver CC to kW (overseas type of measurement units, not the US)

You could convert CI (cubic inches) to HP (US measurements), but you still would be in the same predicament...nowhere

Just remember, there is no replacement for displacement!

Don't they have Google where you live? _{^{Or Wikipedia?}}

http://www.simetric.co.uk/si_cc2hp.htm

Probably 16 +/- 10 cc/hp will encompass most cases.

I am still not getting e-mail notifications of replies even though my control panel looks like I should be.

Yes, cc to hp is very simple, only a few factors

air density, oxygen content, moisture content, fuel density, fuel BTu content, AF ratio, charge density, charge velocity, charge heat, volumetric efficincy of cylinder filling, compression ratio, combustion timing, combustion efficiency, NOx reversion, inter-cyclic variations, exhaust scaveneging...

that leaves 20 or 100 factors out..

There are equations, but you dont want to try them..

Short answer, there is none.

I know this is an old thread, but for anyone still needing this info:

General small engine conversions:

• Divide CC by 15-17 for higher-performance engines
• Divide CC by 25-35 for typical lawn equipment
• Rule of thumb: ~32-35 CC = 1 HP

The exact ratio varies by engine design and efficiency. For detailed conversion charts and explanations, check out: https://www.bitzyne.com/cc-to-hp

Hope this helps!