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I'll vouch for the reliability and quality of NGK plugs!
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90% of spark plug failures on 'aftermarket' plugs is because the supplier has not developed/matched the heat range of the motor correctly...(Ford UK R&D Data!) 
V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
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Joined: Sep 2000
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Originally posted by Terry Haines:
90% of spark plug failures on 'aftermarket' plugs is because the supplier has not developed/matched the heat range of the motor correctly Bosch has a big problem with that!
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Joined: Dec 2001
Posts: 653
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To change the debate for a little bit, what is the heat range, and where can one get the vital information that is needed to make a smart purchase?
Mike
I have a dream, and that is a 69 Boss 302 with Jules Asner in it.
Current - 2002 Chevy Silverado
Former - 98 SVT E0 T-Red 4/4/97 #173 of 6535(so long girl, you'll be missed)
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IIRC, SVT owners always had problems with the +4. To be honest, the Ford spark plugs aren't that bad! Lasted me 91000 miles before 2 of the 6 went out!
Dan Parmelee
1999 Acura Integra SiR-G coupe
"I heard Affleck was the bomb in Phantoms"
"Word, bitch! Phantoms like a muhfuka"
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Originally posted by TheContourGuy:
IIRC, SVT owners always had problems with the +4. To be honest, the Ford spark plugs aren't that bad! Lasted me 91000 miles before 2 of the 6 went out! Au Contraire... I had 2-3 of 6 Motorcrafts go out before 15k and have had great results with the +4's (to date 5k) However with that said; I plan to do a cursory pull of the front plugs to check them before it gets hot again.  I may just put in NGK Platinums and be done with it. :rolleyes:
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Joined: Aug 2001
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Originally posted by TheContourGuy:
IIRC, SVT owners always had problems with the +4. To be honest, the Ford spark plugs aren't that bad! Lasted me 91000 miles before 2 of the 6 went out! I agree with that. My Bosch +4's caused me to ping under acceleration in the summer. The stock plugs did not. After about 15K miles I took the plugs out and the electrodes were being eaten away. This was on a completely stock car at the time. I used a new set of motorcraft double platinums and I'm not sorry...little to no pinging this summer. warmonger
You can call me anything you like as long as it's nice.(all lies accepted)
99 Silver Frost SVT. #226 of 2760
Engine: 3.0 power!
Unique Stuff: Sunroof control module (#1 of 9)
Car Audio: Loaded and loud!
Check them out at
http://home.earthlink.net/~twilson1726
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Most spark plug mfgs use the nuber within the plug # as the heat range ,Champion,NGK but some use their own code,for example Champion go from 51(cold/hard plug) to 69 (hot/soft plug).To comape on physical check refer to the OEM plugs, you cancheck/measure the amount of ceramic insulation that is exposed inside the part of the plug that goes into the cylinder.........
V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
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Who's da man?
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