What spark plug in a 347 Incon twin turbo - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 7 Old 04-14-2007, 07:56 PM Thread Starter
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What spark plug in a 347 Incon twin turbo

What spark plug should I run in my 8.6 compression 347 with AFR 185's and a Incon TT 800 Kit? Thanks [email protected]


89 Black LX Hatch, Dart 363,C4, 88mm turbo, MS3pro.
82 Capri RS 5.0,T5, 4.10 8.8
86 Black GT Dart 331, S-trim, 4R70W
11 Black GT 6A
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post #2 of 7 Old 04-15-2007, 07:28 AM
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www.ngk.com I run one colder than std... My compression is lower at 7.8...
I'd try 2 colder with your compression.. When I use 2 colder they foul up...


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2014 Falcon GTE Supercharged Coyote

85 Lb inj Custom cam ,P 2000 Haltech ecu...4x's 2 coil wasted spark ignition.Twin SC 61-2s with Dart block, 330/4340 Crank, Oliver rods,7.9/ comp c C.P pistons.. 482 rwkw/ 646 rwhp..A.P 4 pot brakes...TKO
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post #3 of 7 Old 04-15-2007, 11:49 AM
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I use NGK iridiums ,one step colder.I dont remember the part# though.Mine is a 8.3-1 with the incon 800tti on a 306.

1992 LX coupe-Incon twin turbos
1983 GT Widebody
1988 BroncoII-5.0/AOD transplant

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post #4 of 7 Old 04-15-2007, 06:58 PM
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Mine is 8.7 or so and I use autolite 3923's with no probs at all.
Gaped at .033
306 though.

89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
579.2rwhp 658.6rwtq,[email protected] kicked off track
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post #5 of 7 Old 04-16-2007, 12:11 PM
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I'll try and check my NGK Iridium part number today after work.

1993 LX hatch
Incon 800TTi, AFR heads, Holley intake, stock cam
11.21 @ 124

480 whp, 520 wtq (10 psi)
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post #6 of 7 Old 04-16-2007, 12:28 PM
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autolite 3923's here with a 331 and a T76

1990 Mustang GT
2004 Mystichrome Cobra
2015 Mustang Ecoboost
2015 RAM 2500 Cummins
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post #7 of 7 Old 04-16-2007, 07:35 PM Thread Starter
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Thanks for all of the replies.

89 Black LX Hatch, Dart 363,C4, 88mm turbo, MS3pro.
82 Capri RS 5.0,T5, 4.10 8.8
86 Black GT Dart 331, S-trim, 4R70W
11 Black GT 6A
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