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josjay


Joined: Feb 22, 2011
Points: 19

what size pulleys
Original Message   Feb 23, 2011 4:18 pm
what size pulley should iput on 305cc engine there is a 51/2'' pulley on blower .it is a 36' cut blower for a lawn mower but i am modifying to go on atv .its a single stage so i want to get most power i can out of it.any help would be appreciated thanks..
Replies: 37 - 41 of 41Next page of topicsPreviousAllView as Outline
aa335


Joined: Nov 29, 2008
Points: 2434

Re: what size pulleys
Reply #37   Mar 16, 2011 11:57 am
I had 4 stroke Honda 160cc engine running above 4000 RPM and it didn't feel right.  The noise was quite loud with the existing muffler.  The vibration was unbearable without some kind of isolation engine mounts from the chassis.
jrtrebor


Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: what size pulleys
Reply #38   Mar 16, 2011 7:01 pm
Increasing the RPM isn't really going to accomplish much.  On OPE engines an increase in RPM at the high end won't do anything to increase the torque. It fact it will probably drop, the higher you rev the
engine.  So the auger may spin faster, until you put a snow load on them. There is no short cut to take if your you don't have enough HP to run a blower.  And that is the problem you have. 
A 10HP engine simply isn't large enough to power a 36" blower. 

If there was a way around that problem with gearing someone would already be doing it.  Blower augers (single stage) and blower impellers
(2 stage)  need the right mixture of power and RPM to operate well.
borat


Joined: Nov 10, 2007
Points: 2692

Re: what size pulleys
Reply #39   Mar 16, 2011 8:15 pm
There is no replacement for displacement when it comes to torque.
Bill_H


Location: Maine
Joined: Jan 12, 2008
Points: 354

Re: what size pulleys
Reply #40   Mar 16, 2011 8:36 pm
borat wrote:
There is no replacement for displacement when it comes to torque.


Reminds me of an old hot rodder's saying "There's no substitute for cubic horsepower" :)

Who the hell let all the morning people run things?
josjay


Joined: Feb 22, 2011
Points: 19

Re: what size pulleys
Reply #41   Mar 17, 2011 7:45 pm
ok good to know for sure  tks for all the info you guys were a great help.
Replies: 37 - 41 of 41Next page of topicsPreviousAllView as Outline
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