Hemi, Demi, Semi . . .

Reply Subscribe

Thread Tools

Search this Thread

10-08-2003, 06:38 PM

Pickle

Registered User

Thread Starter

Join Date: Sep 2003

Location: Annapolis, Maryland

Posts: 88

Likes: 0

Received 0 Likes on 0 Posts

Hemi, Demi, Semi . . .

So what is a "hemi" engine anyway. Can a Diesel be hemi?

Reply Like

10-08-2003, 06:51 PM

4x4

Banned

Join Date: Jan 2003

Posts: 145

Likes: 0

Received 0 Likes on 0 Posts

Re:Hemi, Demi, Semi . . .

A Hemi is a engine with a hemispherical combustion chamber. When the piston is at TDC the valves form a half circle.
Yes a diesel could be a hemi.

4x4

Reply Like

10-08-2003, 07:04 PM

wannadiesel

Adminstrator-ess

Join Date: Mar 2003

Location: New Holland, PA

Posts: 22,594

Likes: 0

Received 16 Likes on 16 Posts

Re:Hemi, Demi, Semi . . .

The dish in our pistons is a squooshed hemisphere, so I think we DO have Hemis. OK, maybe semi-Hemis. On the gassers it was done on the cylinder head in order to get straighter ports without making the engine taller, though I think on the new Hemi it's just for marketing. A wedge shaped chamber is more efficient combustion wise.