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Posted by Worn Out Retread on October 10, 2009, 9:35 am
I am looking for a new snow blower and have discovered that the power rating
of the engines are no longer in "Horse Power" but in "Foot Pounds" if given
at all. Sometimes all that is given is the CC's of the engine.
Even the people selling these machines don't know what the "Horse Power"
ratings are so that old geezers like myself can understand what is going on.
Does anyone have any general rules regarding the conversion of Foot Pounds
or CC's to Horse Power?
--
Ron P
Quick questions rarely have quick answers
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Posted by on October 10, 2009, 10:39 am
On Sat, 10 Oct 2009 09:35:04 -0400, "Worn Out Retread"
>I am looking for a new snow blower and have discovered that the power rating
>of the engines are no longer in "Horse Power" but in "Foot Pounds" if given
>at all. Sometimes all that is given is the CC's of the engine.
>Even the people selling these machines don't know what the "Horse Power"
>ratings are so that old geezers like myself can understand what is going on.
>Does anyone have any general rules regarding the conversion of Foot Pounds
>or CC's to Horse Power?
Your best bet is to find old literature for small engines and make a
chart of displacement=hp. Then use that chart to determine approximate
HP of newer equipment where you know the displacement but not the HP.
It will be a fairly accurate guide.
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Posted by Ed Pawlowski on October 10, 2009, 11:01 am
>I am looking for a new snow blower and have discovered that the power
>rating of the engines are no longer in "Horse Power" but in "Foot Pounds"
>if given at all. Sometimes all that is given is the CC's of the engine.
> Even the people selling these machines don't know what the "Horse Power"
> ratings are so that old geezers like myself can understand what is going
> on. Does anyone have any general rules regarding the conversion of Foot
> Pounds or CC's to Horse Power?
Horsepower to CC is highly variable and not a good measure of power. My
cars have different engines. The 3800 cc is 190 HP but my 3300 cc is 234
HP. I suspect smaller engines are similar.
Foot Pounds is actually more useful as it is the torque to the shaft that is
doing the work. That said, none are truly meaningful in the whole scheme of
things. What good is high horsepower ratings with a poorly designed snow
throwing system?
Check out some models here
http://www.dontshovel.com/snow_blower_comparisons.html
http://www.consumerdemocracy.com/phelp/cd4/listPosRevs2B.aspx?catId=9996
If I was buying a new machine, I'd base my decision on features, size, drive
type, and what is important for my situation. The manufacturer will couple
the right sized engine to perform with the design of his machine. A half HP
difference is going to be not noticed, but a clogged chute will piss you off
every time.
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Posted by on October 10, 2009, 11:19 am
wrote:
>>I am looking for a new snow blower and have discovered that the power
>>rating of the engines are no longer in "Horse Power" but in "Foot Pounds"
>>if given at all. Sometimes all that is given is the CC's of the engine.
>> Even the people selling these machines don't know what the "Horse Power"
>> ratings are so that old geezers like myself can understand what is going
>> on. Does anyone have any general rules regarding the conversion of Foot
>> Pounds or CC's to Horse Power?
>Horsepower to CC is highly variable and not a good measure of power. My
>cars have different engines. The 3800 cc is 190 HP but my 3300 cc is 234
>HP. I suspect smaller engines are similar.
For the types of engines generally found on lawn equipment, comparison
of new engines and old engines of same brand and displacement is a
valid comparison. These are utility engines designed to run at optimum
RPM's while in use. A car engines is vastly different in it's
requirements.
If an old snowthrower with a 13 hp Briggs engine is 350cc, then a new
350cc Briggs powered snow blower will be about the same HP.
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Posted by Ed Pawlowski on October 10, 2009, 11:38 am
> If an old snowthrower with a 13 hp Briggs engine is 350cc, then a new
> 350cc Briggs powered snow blower will be about the same HP.
B & S is using the foot pounds from what I've seen. an 8.5 ft lb is 6.5 hp
11.5 = 7.5 hp 15.5 = 11 hp
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>of the engines are no longer in "Horse Power" but in "Foot Pounds" if given
>at all. Sometimes all that is given is the CC's of the engine.
>Even the people selling these machines don't know what the "Horse Power"
>ratings are so that old geezers like myself can understand what is going on.
>Does anyone have any general rules regarding the conversion of Foot Pounds
>or CC's to Horse Power?