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Abby’s Guide > Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) > Discussions > That thing got a Hemi????

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Emmo


Joined: May 22, 2003
Points: 1065

That thing got a Hemi????
Original Message   Jul 16, 2005 1:14 pm
Replies: 2 - 11 of 23Next page of topicsPreviousNextNext page of topicsAllView as Outline
AZinOH


Those who accept self-deception will perish by it.
Shakespeare said "to thine own self be true".


Joined: Nov 25, 2004
Points: 189

Re: That thing got a Hemi????
Reply #2   Jul 16, 2005 3:04 pm
What I want to know is...what is the recommended sustained RPM in that application? What is the recommended oil change interval and recommended oil? Is that a single stage or two-stage...and where can I get one?

Snowblower...Toro Power Max 726te 2004

Lawn tractor...AYP w/ 14.5 Briggs-42in 2000

AJace


I have an Ariens 926 Pro because I like Orange



Location: Near Gettysburg
Joined:
Points: 969

Re: That thing got a Hemi????
Reply #3   Jul 16, 2005 3:12 pm
ooooo, nice.  Just raise the RPM and that should work in any application. 

Ariens 926 DLE Professional; Toro S200; Craftsman LT1000, Echo ES-230;

Marshall


As Long As There Are Tests, There Will Be Prayer In Public Schools. ;- )

Joined: Sep 16, 2002
Points: 7730

Re: That thing got a Hemi????
Reply #4   Jul 16, 2005 7:26 pm
Now those are cool!

That thing sure sounded like it was pushing much more than 2500 RPM's.
Dantheman


Location: Orange County, N.Y.
Joined: Jan 21, 2003
Points: 561

Re: That thing got a Hemi????
Reply #5   Jul 16, 2005 9:11 pm
The Snowblower needs to operate like those commercial walkbehind mowers that have the attachment that allows you to stand on it. They're like a zero turn.

Then they would have to add on a speedometer.

                                                                                             Dan

cleanmaxx_brian


"At least I am enjoying the ride"

Location: Wantagh, Long Island, NY
Joined: Mar 12, 2005
Points: 231

Re: That thing got a Hemi????
Reply #6   Jul 16, 2005 10:48 pm
You mean one of these


Now if a HEMI would fit....hmmmmm!!!!

Brian Chang

Ariens 8526LE, Bradley 32" 12.5HP walk behind mower, Echo BP200 blower, Troy Built 4.5HP Pressure Washer,  Craftsman 4.5HP Yard Vac, Homelite line trimmer, Scotts 21" high wheel mower, MTD 3.5HP Edger.

Roger


Joined: Mar 1, 2005
Points: 355

What is a hemi?
Reply #7   Jul 16, 2005 11:30 pm
For those of us who are ignorant, could someone please define what a hemi is and does.

Thanks

Majorxlr8n


Location: Freehold NJ
Joined: Aug 6, 2003
Points: 1092

Re: That thing got a Hemi????
Reply #8   Jul 17, 2005 1:22 am
The word HEMI is actually short for hemispherical. In a piston engine, the area from the top of the piston to the top of the cylinder head by the valve heads is known as the combustion chamber (this is actually just an area of air!). The combustion chamber on most overhead valved AUTOMOTIVE engines are either wedge shaped (think of a piece of pie) or hemispherical (think of tennis ball cut in half). The cylinder head design dictates the combustion area shape, so when someone says "hemi", it really only refers to the engine's cylinder head having a hemispherically shaped combustion chamber.

Hemi heads have the spark plug located at dead center of the combustion chamber, which makes for an extremely efficient & powerful fuel/air mixing & flame burn (actual igniting of the fuel/air). Hemi heads also have ideal valve placement to help the flow of air (intake & exhaust) through the cylinder head. In simple terms, the head design is VERY efficient, and allows an engine to make excellent power! On the downside, hemi heads themselves usually are quite heavy & large, and valvetrains can be somewhat complex (read: expensive).

Wedge shaped combustion chambers are what most OPE engines have, as do most automotive engines. The "wedge" shape by design, is not as efficient as a "hemi" due to all the sharp angles that are present, which creates turbulance. The valve placement & spark plug location are less than ideal also. Cost was a big factor that lead to the wedge design. However, a wedge chamber CAN be modified to produce very impressive burn & airflow rates - having said that, IMHO all this "HEMI" talk (car & truck commercials) as of late really doesn't impress me personally. Chrysler/Daimler is really getting a lot of hype & sales out of it though...

There is another variation of head called a semi-hemi, but it is not widely used. It is actually a cross between a wedge & hemi shaped combustion chambers.

Marty

This message was modified Jul 17, 2005 by Majorxlr8n


Bill_D


Nice day for a mow!!

Location: Chicago
Joined: Dec 6, 2002
Points: 920

Re: That thing got a Hemi????
Reply #9   Jul 17, 2005 6:41 am
Bruce Willis has a vintage bike w/ a semi, hemi, Demi, in it. (Rim Shot)
Garandman


Location: South Boston, MA
Joined: Mar 10, 2005
Points: 341

Re: That thing got a Hemi????
Reply #10   Jul 17, 2005 7:39 am
This one doesn't but it's got a 454....



Item #7701609184 on eBay.
Marshall


As Long As There Are Tests, There Will Be Prayer In Public Schools. ;- )

Joined: Sep 16, 2002
Points: 7730

Re: That thing got a Hemi????
Reply #11   Jul 17, 2005 10:55 am
Bill_D wrote:
Bruce Willis has a vintage bike w/ a semi, hemi, Demi, in it. (Rim Shot)

ROFL


Garandman, that thing is awsome. With open headers, I'm sure it gets the neighbors attention.
Replies: 2 - 11 of 23Next page of topicsPreviousNextNext page of topicsAllView as Outline
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