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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 03-02-2007, 05:11 AM   #1
smokesricers
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Default What heat range plug

I want a step colder spark plug to use with my 125 shot but what heat range is it that i need? I cant find it anywhere? Thanks!
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Old 03-02-2007, 03:22 PM   #2
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Default RE: What heat range plug

With that setup, I'd run autolite 24s.
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Old 03-02-2007, 03:36 PM   #3
93stallion302
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Default RE: What heat range plug

Autolite 23's is wat im switchin to on a 100shot. idk if 24's are too hot or not better safe than sorry.
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Old 03-02-2007, 03:40 PM   #4
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Default RE: What heat range plug

Running a colder range it not necessarily the "safer" option though. Don't forget that if you run a plug that's too cold, you could end up fouling your plugs and they become useless. With a supercharger and a 100 shot of nitrous my autolite 24s are right on the money. I actually just happened to pull a plug last night to test it and it looked great.

If you run a plug thats too cold and if you happen to run a little rich...forget about it. Might as well toss the plugs now because they probably won't last long.
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Old 03-02-2007, 04:03 PM   #5
92GreyGT
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Default RE: What heat range plug

When I ran spray Nitrous Express told me that I didn't have to run a colder plug unless I went over 150 shot. I may have to run a colder plug but not to golower than one heat range. I ran 25s and never had a problem running 150 shot.
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Old 03-02-2007, 09:44 PM   #6
smokesricers
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Default RE: What heat range plug

I have a set of platinum autolites (ap764) and its says the heat range is 4. Can i use these? Is this the same as "24's"
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Old 03-02-2007, 10:41 PM   #7
2 kwik
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Default RE: What heat range plug

if your not reading it after a wot blast then you not see $hit
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ORIGINAL: samseed101

Running a colder range it not necessarily the "safer" option though. Don't forget that if you run a plug that's too cold, you could end up fouling your plugs and they become useless. With a supercharger and a 100 shot of nitrous my autolite 24s are right on the money. I actually just happened to pull a plug last night to test it and it looked great.

If you run a plug thats too cold and if you happen to run a little rich...forget about it. Might as well toss the plugs now because they probably won't last long.
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Old 03-02-2007, 11:32 PM   #8
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Default RE: What heat range plug

Run and autolite 23.
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Old 03-02-2007, 11:32 PM
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150, 165, 50, 50l, 93, afr, ap764, autolite, cold, cooler, ford, heat, mustang, nitrous, plug, range, run, shot, spark

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