CC to HP - Snowblower Forum : Snow Blower Forums
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post #1 of 27 Old 01-05-2015, 07:39 PM Thread Starter
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CC to HP

I'm in the market for a new machine,not used to CC...... What ever happened to HP
From what I read you divide CC by 2 then divide that answer by 2 = HP
Today a salesman told a certain machine 420CC was same as 10HP
When I calculate it, it comes out to 13HP, am I wrong on how to calculate.
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post #2 of 27 Old 01-05-2015, 07:42 PM
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[email protected] no your good in your conversion have a look here you'll see your good

Small Engine Cubic Centimetres (cc) to Horse Power Calculator

i have a 420cc engine and was wondering the same what was the HP
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post #3 of 27 Old 01-05-2015, 07:56 PM
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You can't directly equate CC to HP, it just doesn't work.
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post #4 of 27 Old 01-05-2015, 07:58 PM
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Quote:
Originally Posted by [email protected] View Post
I'm in the market for a new machine,not used to CC...... What ever happened to HP
From what I read you divide CC by 2 then divide that answer by 2 = HP
Today a salesman told a certain machine 420CC was same as 10HP
When I calculate it, it comes out to 13HP, am I wrong on how to calculate.
+1 with cubcadet but with the same block size the engine manufacturers can vary the HP from 8hp to 13hp with practically the same engine as it all depends on the carb and timing of the engine in question and the output HP the snow blower actually needs. It is confusing a bit but it's all a question of economics for these manufacturers.

Snow Removal Apparatus I own:
Ariens ST1530DLE, and good ole arm powered scrapper.
The 15 HP is a new Ducar engine sold
by Princess Auto in Canada.
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post #5 of 27 Old 01-05-2015, 08:27 PM
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Quote:
Originally Posted by 94EG8 View Post
You can't directly equate CC to HP, it just doesn't work.
Very true!

That calculator link that was posted is probably pretty close to what a small engine makes given the CCs.

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post #6 of 27 Old 01-05-2015, 08:50 PM
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The closest answer would be to look up Honda engines. They post CC and HP for most of their GX engines. You also have to remember that over head valve and side valve engines don't compare to each other at all.

As for the reason why, there was a lawsuit about 7 years ago or so from companies fudging their numbers. Now they just use the volume inside the engine.

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post #7 of 27 Old 01-05-2015, 10:10 PM
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Originally Posted by Shryp View Post
The closest answer would be to look up Honda engines. They post CC and HP for most of their GX engines. You also have to remember that over head valve and side valve engines don't compare to each other at all.

As for the reason why, there was a lawsuit about 7 years ago or so from companies fudging their numbers. Now they just use the volume inside the engine.
Shryp with Honda aside would you agree that some manufacturers use the same volume for different HP output depending on the need?
Tecumseh had 3 different HP outputs with the 358cc as far as I know.
Many thanks

Snow Removal Apparatus I own:
Ariens ST1530DLE, and good ole arm powered scrapper.
The 15 HP is a new Ducar engine sold
by Princess Auto in Canada.

Last edited by Normex; 01-06-2015 at 12:38 AM.
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post #8 of 27 Old 01-05-2015, 10:56 PM
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I agree with 94eg8....The concept is no good...Flatheads, OHV, OHC...At what RPM...Etc...and no mention of Torque....the real measure...Wondering if the calculator would have been more accurate if it converted CC to torque..?
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post #9 of 27 Old 01-05-2015, 11:08 PM
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You can convert cc to cubic inches and nothing else.


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post #10 of 27 Old 01-05-2015, 11:15 PM
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420 cc would be a 25 cubic inch.


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