Evolved Member
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For every 100hp over stock, its recommended you run 1 step colder plugs.
Well the whole point of iridium plugs is to have that iridium coating on them. Once you scrape that off, it becomes a normal copper plug.Originally Posted by Pal215
I had my car dyno'd on a dynopack dyno with iridium plugs and it made 320awhp on 91. It started to break up a little bit, so we took the plugs out and gapped them to the correct gap. After another dyno run the car made the same power and ran without any issues even on high boost. What do you mean by "making them worthless?"For every 100hp over stock, its recommended you run 1 step colder plugs.
You have the right idea of getting colder plugs as your hp goes up. Thats why im saying it makes no sense to put in a plug with a hotter heat range than stock especially when the car is modified.
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That is why you gap the iridium plugs with a feeler gauge... I even gap the copper cores with a feeler gauge...
Evolved Member
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Doesnt matter which method you use to gap the plugs youre still scraping off the iridium.Originally Posted by Freddie@Spec-Ops
That is why you gap the iridium plugs with a feeler gauge... I even gap the copper cores with a feeler gauge...
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Not if you do it right. Trust me, if I had ruined my .018 gapped plugs I couldnt have done 40psi/830whp on stock ignition with bad plugs. There is a right way and its very possible. Feeler gauges dont scrape if you know how to use them. Altering the gap if you go to far isnt hard if you think about what you cant do to widen it back out.Originally Posted by turbotalawd
Doesnt matter which method you use to gap the plugs youre still scraping off the iridium.
However that part number shows (PLFR6A-11) the same price as the ILFR anyway.