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Re: Dual plug reasoning? [Re: DemonDust] #2835985
10/22/20 08:33 AM
10/22/20 08:33 AM
Joined: Apr 2003
Posts: 2,925
Tulsa, Oklahoma
340Cuda Offline
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340Cuda  Offline
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Tulsa, Oklahoma
Originally Posted by DemonDust
There are several big power turbo builds running 1000+ hp using one plug.
Don't some of the heads up series add extra weight on 16 plug engines?

Re: Dual plug reasoning? [Re: superhog88] #2837205
10/25/20 09:04 AM
10/25/20 09:04 AM
Joined: Jun 2016
Posts: 169
Wisconsin
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Medlock51 Offline
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Medlock51  Offline
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Wisconsin
One plug fires 20 degrees btdc...the second fires 5 degrees atdc to clean up the nox emissions.

Re: Dual plug reasoning? [Re: Medlock51] #2837279
10/25/20 12:48 PM
10/25/20 12:48 PM
Joined: Jul 2004
Posts: 3,231
Arlington, Texas
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bobby66 Online content
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bobby66  Online Content
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Arlington, Texas
Years ago I owned a 426 Hemi out of a Modified Production Coronet. It had dual plug heads and I don't think emmisions was a concern on that engine. work


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Re: Dual plug reasoning? [Re: Medlock51] #2839257
10/30/20 11:33 AM
10/30/20 11:33 AM
Joined: Dec 2015
Posts: 109
Michigan
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Michigan
Originally Posted by Medlock51
One plug fires 20 degrees btdc...the second fires 5 degrees atdc to clean up the nox emissions.

This is incorrect. They fire at the same time.


1975 Jeep Cherokee compound turbo 5.7 Hemi/6 speed AutoX/Drag/Street.
9.97 @ 140 slicks, 10.74 in autox trim
Re: Dual plug reasoning? [Re: Medlock51] #2845327
11/12/20 12:43 PM
11/12/20 12:43 PM
Joined: Feb 2003
Posts: 1,198
Laveen, Arizona
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Posts: 1,198
Laveen, Arizona
Originally Posted by Medlock51
One plug fires 20 degrees btdc...the second fires 5 degrees atdc to clean up the nox emissions.


Why would two plugs be needed for that? Just fire the same plug twice.


1949 International KB-2 "Mater" - 302/T5

1968 Dodge Dart GTS "The Drat" - 340/727

1972 Dodge D200 Adventurer - 318/727, eventually 440/518

2006 Dodge Magnum R/T "The Wagnum" - Hemi

2016 Dodge Durango Limited - 3.6
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