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this is gonna sound like a newb question, but could somebody explain to me how fomoco has the part #'s set up for there spark plugs? how do i know that i am getting one or two heat ranges colder? how does the aftermarket set up there part 3's to reflect those of fomoco? 
2000 csvt #1553
Black/Tan
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I don't even bother with Ford part #s any more. They change so often that I would go nutz trying to keep up - even with a computer to help me. I have also learned the value of the opinions from the informed persons on this site & resigned to buy the Autolite APP764 double plats for my V-6. They are doin' great.
Must be that jumbly-wumbly thing happening again.
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why was this thread moved...this was not a maintenance issue, i'm not lookin' for new plugs because i need a regular tune up. i am looking for a colder plug for better performance while running increased timing??
whatever. can anyone answer the question in the first post?
i too have used the app764's. went back to the motorcraft's. just like them better. i want to know how to discern the colder heat range plugs form the higher ones by reading the part #.
2000 csvt #1553
Black/Tan
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The 2000 SVT uses a one step colder plug. That may be your best answer.
Ford has changed much of the part number system on the spark plugs for simplification and consolidation of inventory. The one thing that hasn't changed is the numerical part of the part number. For example the original plug may have been AWSF32PP. The 32 is the numerical part of the part number. The heat range is determined by the first character in the number part, or the 3. The next colder plug would be a 22, or AWSF22PP.
The 2000 SVT had higher compression and thus the reason for the colder plug.
I'm not sure that increased timing will create the need for a colder plug.
Whet is ment by a colder or hotter plug is that the tip more or less insulated from the water jacket so that the actual temperature of the tip is hotter or colder due to more or less cooling from the head (water jacket in head).
A plug that is too cold will foul easy and the fouling will cause a misfire unless or until it cleans up. A colder plug will not wear as fast.
A plug that is too hot will wear too fast and possibly induce ping.
It helps to read the existing plug to help determine if it is too hot or too cold.
My experience has been that it usually takes a lot of modifications to warrant changing the heat range.
Jim Johnson
98 SVT
03 Escape Limited
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nitrous is on the list that is why i ask.  thank you for the response jim
2000 csvt #1553
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I had very good results running the stock heat range in my 00 SVT.
I only switched to the step colder when I was testing timing curves. (They did help a little there at crazy timing levels)
The step colder were "too" cold for normal driving in "colder" weather.
That's a fact as the MPG dropped more then the norm from the climate change itself. Yes I tested that too.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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98.5 Black SE ATX
S&B filter, SVT MAF, optimized SVT TB, mesh grille, removed orange reflectors, painted rear reflector, gutted pre-cats, optimized SVT LIM, 19lb injectors, resonator removed
cant afford an svt but lookin for 1 in nc
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I know....i know. Underbody aero dynamics 
E0 SVT
Kids, yeah, I have kids. How many do you want?
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Originally posted by Bike2112:
I know....i know.
Underbody aero dynamics
Not true.
I have a big piece of card board cut out in the shape of a wind screen for under the engine bay.
It was suppose to be a template for making one from a sheet of lightweight plexiglass but I never got around to it.
The painted cardboard works fine but it's not durable or usable more then a few times. (fair weather of course)
I don't know how well it actually "works" as the SVT under shield does a decent job with it's design.
Matter of fact I was even planning on breaking it out to see if it would help my trap speed any.
I was so ill-prepared when I went to the track last spring. Full tank of fuel, street tires, NO practice, only removed the jack & spare.
Like they say hindsight is 20/20 so I want to make it to a Sunday session this month using that hindsight as foresight.  
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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What is the normal heat range for our SVT's. I have a 98 if it makes any difference.
98 Contour SVT (soon to be reborn)
2000 GMC Envoy... Screw you guys, I like it.
89' Mustang 5.0 (Just bolt on's... for now)
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