North American Turbocoupe Organization



FYI ..... .24 is not a good gap!
Tbird73 Offline
Member
#1
I had a boost problem. I couldn't boost past 10 lbs without the car bogging down. ... turns out the previous owner gapped the plugs at .24. I regapped them to .28. .... Problem Solved!!!! :-)
Greg Corriveau
1987 Black TC stock
--------------------------------
God is First ...... I am Second
Plain and Simple!!!
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BJL Offline
Moderator
#2
awesome, thanks for sharing this!
hows it feel to really run her now???
Brian Larkin
88TC 330,000 miles
Slightly Modified
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Jeff K Offline
Administrator
#3
I run my NGK 2238 plugs at .032, and have no problems at 24 psi boost. I do run an MSD E core coil. While it has questionable reliability, the Ford TFI ignition system produces a good strong spark.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Joe F Offline
Posting Freak
#4
I believe the stock gap recommended is .034", at least that's what I always used when my ignition system was stock.

With an MSD 6AL and Blaster coil, I gap my plugs at .045" and it runs great - smoother than it ever ran with the stock ignition system.

Just my 2¢ worth. Confusedmokin:
JR's Place - My '87 Turbocoupe
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boosted chicken Offline
Senior Member
#5
I have gapped mine as tight as .018" before. It currently is at .020". I'm running just under 30psi with E-85 and even with my MSD coil and MSD 6530 box, I wonder if I could even run much more.
I know its not apples to apples..
88 TC#1 Boport stg 3 alum dport head, PT6466, Boport header, CP pistons, Crower rods, MS2xtra
88 TC#2 drag car project(someday)
88 TC#3 parts car (just needed the header panel...bought the whole car, lol)
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Tbird73 Offline
Member
#6
So the more fuel pressure and boost you have the smaller the gap on the plug?
Greg Corriveau
1987 Black TC stock
--------------------------------
God is First ...... I am Second
Plain and Simple!!!
Reply

Jeff K Offline
Administrator
#7
The higher the cylinder pressure, the harder it is for the spark to jump. Fuel pressure has nothing to do with it.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

Tbird73 Offline
Member
#8
Oh ok, thanks for the knowledge!
Greg Corriveau
1987 Black TC stock
--------------------------------
God is First ...... I am Second
Plain and Simple!!!
Reply





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