spark plug options for Gen3
#1728493
01/12/15 10:48 PM
01/12/15 10:48 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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What are they?
Im running ngk LZTR5A
Gen 3 power 6.22@110, 9.85@135
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performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: spark plug options for Gen3
[Re: 440Jim]
#1728495
01/13/15 12:38 AM
01/13/15 12:38 AM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
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Posts: 9,225
Charleston
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426 with 5.7 heads. Will the msd hemi 6 be ok with iridium plugs?
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: spark plug options for Gen3
[Re: 440Jim]
#1728496
01/13/15 12:55 AM
01/13/15 12:55 AM
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Joined: Jan 2003
Posts: 154
Plano, TX
StricNine
member
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member
Joined: Jan 2003
Posts: 154
Plano, TX
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Those plugs shown above are stock heat range 09+ 5.7 (Eagle). The Eagle heads use a gasket type plug, the 08 and older 5.7 don't use a gasket and have a bevel that seals the plug to the head.
A 1 step colder plug for an Eagle head (copper) is LFR6C-11 (NGK).
StricNine
79 Li'l Red Express, 15.04 @ 89.57
09 Challenger R/T, 11.95 @ 115.92
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Re: spark plug options for Gen3
[Re: 72Swinger]
#1728499
01/13/15 01:15 AM
01/13/15 01:15 AM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
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Drag Week Mod Champion
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Drag Week Mod Champion
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Charleston
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So because I'm a super genius, I came up with this super idea. I'll just yank the plugs out of my Apache heads and they are the same style as 6.1 plugs so only the Eagles are different
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: spark plug options for Gen3
[Re: sixpackgut]
#1728504
01/13/15 01:28 AM
01/13/15 01:28 AM
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Joined: Jan 2003
Posts: 154
Plano, TX
StricNine
member
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member
Joined: Jan 2003
Posts: 154
Plano, TX
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Just to be clear, the LFR5C-11 are stock 09+ 5.7 plugs and are the same heat range as the stock 6.1 plugs. They are not interchangeable as the 6.1 head uses a tapered seat plug and Eagle head uses a gasket type plug.
The LZTR5A are stock heat range 6.1 plugs, and 1 heat range colder 08 and older 5.7 plugs.
If a tapered seat plug is installed in an Eagle head it's probably best to keep using a tapered seat plug from that point forward. The tapered seat plug will deform the area around the "seat" of the plug in the head and will probably make sealing a gasket type plug problematic in the future.
StricNine
79 Li'l Red Express, 15.04 @ 89.57
09 Challenger R/T, 11.95 @ 115.92
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Re: spark plug options for Gen3
[Re: slammedR/T]
#1728505
01/13/15 01:29 AM
01/13/15 01:29 AM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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But then your Apache heat range would need tweaked anyway......
Mopar to the bone!!!
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Re: spark plug options for Gen3
[Re: sixpackgut]
#1728507
01/13/15 01:40 AM
01/13/15 01:40 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Quote:
So because I'm a super genius, I came up with this super idea. I'll just yank the plugs out of my Apache heads and they are the same style as 6.1 plugs so only the Eagles are different
Hey idiot, it may be cheaper to change the springs and run the Apache head than change spark plugs
You will have to port them first 
Your talking to yourself 
Duuuhh.... LOL
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