Just about everyone has a HEMI

[Tucson_02Silverado]

I by no means know 100% of any one thing...but,

 

During one of our usual lunch time statements and questions (usually it's a back to the office Let's google question like what TV shows are spin-off of Beverly Hillbillies, BTW I had said Petti-Coat Junction and Green Acres but told wrong until it was googled).

 

There was a talk from one making a humongous big deal about Dodge and the 5.7/6.0 HEMI. Most (almost in unison) reminded this person that Daimler is using the HEMI name to make people think it's the 426 of past (actually of great). I added that practically every car sold in the past ten + years is a HEMI. That they have hemispherical heads anyways and that is what the Chrysler "elephant" engines had. That's when the group thought I was full of it, not to mention the new-age HEMI freak of the group.

 

Ok for some reason I'm having some doubts of my statement. A quick search, most manufacturers don't have any real mention of the head types on the engines.

 

Am I full of it?????

[Dana_15]

Your right...I think. I couldn't find any info either but I thought pretty much every head was hemi-spherical.

[Wingnut]

Your right...I think. I couldn't find any info either but I thought pretty much every head was hemi-spherical.

 

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Nah, mine is shaped like an egg.

[carneyman]

Your right...I think. I couldn't find any info either but I thought pretty much every head was hemi-spherical.

 

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Nah, mine is shaped like an egg.

 

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Poor wingnut....we had such high hopes for him too.

[Worktruck]

Here's a quote from http://www.athomemechanic.com/archives/200..._is_a_hemi.html

 

"So what is special about the new Hemi engine? A pushrod design, there is nothing innovative about that. It uses electronic fuel and ignition control, but you would be hard pressed to find an engine sold today that does not have them. Duel spark plugs per cylinder help to burn the air/fuel mixture cleanly, but aircraft engines and racing engines had this back in the 1930's. So that hemispherical combustion camber shape must be the deciding factor.

 

Well actually, no. Other manufacturers have caught on to the design and have a hemispherical combustion chamber shape. My 1987 Honda Civic CRX engine has hemispherical combustion chambers, and nearly all modern engines have a variation on that design. While it may be cool to have an engine with the Hemi label, nearly all car engines today have that feature. So if you are asked if you have a Hemi in there, you can say "Sure.""

 

 

I've also been of the thought that alot of "modern" engines are of the hemi design. BTW I guess Chrysler registered the "Hemi" (with a capitol H) name at some point and now owns the trademark.

[OUMike]

Personally I'm a fan.

 

No. All pistons these days are not hemispherical. Just watch any of the shows like Horsepower TV and you'll see. I kinda feel like Chrysler has a patent on this technology as well.

 

I know I'm a GM guy, so I'm supposed to hate the hype or whatever but after attended car shows and seeing things like Magnum SRT-10, and Charger SRT-10 it brings a smile to my face. Plus...who cares if its really not that uncommon anymore..425hp is 425hp. Anything to keep American sports cars alive is something I'm a fan of.

[Worktruck]

No. All pistons these days are not hemispherical. Just watch any of the shows like Horsepower TV and you'll see

 

I believe the term "Hemi" refers to the shape of the cylinder head. The valves are equidistant from the spark plug or plugs that are located in the center of the dome shaped combustion chamber in the cylinder head. The pistons are either flat top of concave like all other pistons. But, I could be wrong. Thought i was once , but I was mistaken..................

[pwall]

This might help a little:

http://auto.howstuffworks.com/hemi.htm

[doverarjim]

Mopars hemi is the true one in design, when GM started selling the 396 it was called a simi-hemi. The spark plug in the middle of the valves is one of the big factors in what is hemi and what is not. The combustion chamber in the hemi is shaped like a ball cut in half. The combustion chambers on most other motors are more flat around the spark plug and the the valves set side by side. I hope this helps.

[Buggle_96]

I didnt know they used dual spark plugs per cylinder...thats kinda cool.

[OUMike]

No. All pistons these days are not hemispherical. Just watch any of the shows like Horsepower TV and you'll see

 

I believe the term "Hemi" refers to the shape of the cylinder head. The valves are equidistant from the spark plug or plugs that are located in the center of the dome shaped combustion chamber in the cylinder head. The pistons are either flat top of concave like all other pistons. But, I could be wrong. Thought i was once , but I was mistaken..................

 

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No your right. I meant cylinders...dunno why I said Pistons. Thanks.