Spark plug comparison - pictures
#22
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Spark plug heat range is pretty much entirely horsepower and intake temp dependant. Going too many steps colder will only give you plug fouling and poor performance compared to a plug in the correct heat range when the engine is not WOT and being driven daily.
#26
Originally Posted by tenblade2001,Sep 12 2004, 02:50 PM
i broke 2 denso plugs trying to gap them...they're a b*tch to do. look forward to your report dave
There are better gappers on the market but I haven't acquired one yet.
I used some strong needle nosed pliers to open the gap and that gapper to close the gap when needed. It seemed to grab it fine when closing. Doing it this way, I was never pressing on the center electrode, which I assume, is what is the most delicate.
So far, it's been about a month since putting these plugs in and they have been performing flawlessly. I plan to pull them soon to see how their doing. However, I can't honestly say that they give any more (or less) power. They perform about the same for me as did the OEM platinums and the copper racing plugs. I'm hoping with these plugs, that I won't need to think about replacing them for a very long time.
#27
Originally Posted by RACER,Aug 17 2004, 04:55 AM
The Denso's (Iridium) actually put out a bigger spark. On a street car such as the S, (stock setup) the plug may get just hot enough to keep itself clean. Don't know about you, but I never, never drive less than 5-10 miles at a time. I get it hot every time I drive it. I would think the Iridiums should last at least 50,000 miles.
#28
Originally Posted by xviper,Sep 12 2004, 07:54 PM
There are better gappers on the market but I haven't acquired one yet.
you would probably be better off sticking with needle nose pliers and a gap gauge. I bought the pliers to give them a try and ended up breaking two plug tips with them. The pliers are very cheesy and poorly designed. They use a disc with a graduated edge, like the pocket gappers sold in most auto parts stores for under a dollar, and the instructions advise that a standard feeler gauge should be used to re-check the gap of the plugs after gapping them with the pliers.
The pliers aren't worth the $40 price tag and they're not worth the hassle in my experience.
Dean
#29
Dean, thanks for the heads up and for being the Guinea Pig. I looked at those and decided that the design was not condusive to safe gapping. I guess I'll just stick with the needle nosed pliers.
#30
Originally Posted by xviper,Sep 16 2004, 10:45 AM
Dean, thanks for the heads up and for being the Guinea Pig. I looked at those and decided that the design was not condusive to safe gapping. I guess I'll just stick with the needle nosed pliers.
Dean