Dual plug.

Discussion about the Hemi in general.

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Goran
Posts: 25
Joined: Thu Jan 17, 2008 2:01 am
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Dual plug.

Postby Goran » Fri Jul 13, 2012 7:38 am

Here is more, I installed dual plug last winter. This turned out real good with a spark timing reduction of some 8 dgr as a general number. The Hemi has as we all know a big combustion chamber thatt require a large piston dome, creating an egg shell shape chamber. Dual plug will shorten the flame travel on this motor and a shorter timing will create less piston force on the piston uppway travel and a more pecise cylinder pressure on the right dgr. I should raise the cr ratio to some 14:1 for E85 to see what the fuel consuption will be. Today it is 15 mpg E85 which equlize 21 mpg on gas, on steady state 60 mph.
Image
I use steel valve cowers, these are lighter than the cast aluminium stuff.
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The COP coils are nearly like Hemi stock stuff.
Goran
I am a 69 years old sportscar freak living in Sweden with a Hemi equipped Pantera.

mart
Posts: 536
Joined: Tue Mar 22, 2005 2:06 pm

Re: Dual plug.

Postby mart » Sun Aug 12, 2012 9:29 am

Goran, what you've done - and are doing - with that "car" (it's not a car it's truly a piece of engineering artwork!) is nothing short of amazing!

Goran
Posts: 25
Joined: Thu Jan 17, 2008 2:01 am
Contact:

Re: Dual plug.

Postby Goran » Mon Aug 13, 2012 3:31 am

Thank you, it's nice to hear. I will post pictures of my ideas about the car, it should lose weight and get bigger engine.
I am a 69 years old sportscar freak living in Sweden with a Hemi equipped Pantera.


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