why two

Reply Subscribe

Thread Tools

Search this Thread

11-09-2007, 11:43 AM

edbobx

Guest

Posts: n/a

why two

i was just wondering why the new hemis have two spark plugs per cylinder. i wasn't sure if it was a form of waste spark or what. any feed back would be appreciated

Reply Like

01-28-2008, 08:42 PM

CAT-TECH

Guest

Posts: n/a

better combustion. More spark means more fuel can be burned, better emissions, and best of all better mpg

Reply Like

01-29-2008, 04:41 PM

Commando

Mopar Lover

Join Date: Nov 2007

Location: New Jersey

Posts: 935

Likes: 0

Received 0 Likes on 0 Posts

I also drive a Ford Ranger, its a 4 cylinder and has 2 plugs per cylinder so it is not just Hemis. I was told that the plugs fire at different times so that all the fuel is burned. It gets about 25 mpg, and can accelerate just as well as a 6 cylinder, but comes no where close to my Mopar.

Reply Like

01-29-2008, 05:22 PM

CAT-TECH

Guest

Posts: n/a

One plug probably fires just after TDC compression and then again after 20-30 degrees of rotation. This is a complete guess on my part but sounds like it makes sense. If someone knows when the plugs really fire that would be much appreciated.

Reply Like