Best Spark Plugs?
#46
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If the heat range on the spark plug is high enough, i could see it getting hot enough to act as a glow plug and causing some detonation, but i don't know for sure. I do know from messing with bikes and atvs (especially 2cycles which get really hot) that running a spark plug that's too hot can result in a melted piston.
#47
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where did you read that jimbo1111. now how would a spark plug, well spark by itself. i really dont think so.
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#48
Burning Brakes
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I am one of the disbelievers/naysayers of the NGKBPRES. I have a 1989 944 Turbo Estock car. I have tried single electrode Bosch platinum against the NGK's on two seperate and independant occassions, once in Maryland about 4 years ago and just recently here in kansas City on Imagine Auto's dyno. On both occassions the dynos showed a consistent improvement with the Bosches of 4-5HP, over brand new NGK's gapped to the "magic" numbers. The Bosches were again a good return for the money and I certainly won't be going back. It would be nice ro try something different, the next dyno session will be with the Beru Silverstone S7, perhaps I can find a couple more HP, which means everything in stock class.
#49
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The reason copper is recommended, is because it's a very good conductor to help with consistantly jumping the gap in a high pressure environment (turbocharged). That's the only reason.
Apparently, silver is supposed to be even one step better, yet. Don't know if the silverstone is actually silver or just marketing hype.
Anyway, copper wears faster (they don't last as long), so some people think they're doing you a favour by recommending another material type plug. (It doesn't matter in a NA engine).
Now getting back to the tip-breaking issue. I would certainly entertain a copper NGK if the f@#&king tips are prone to breaking with the Bosch!
So, what NGK plug would be a direct replacement for the stock bosch WR7DC (which is copper), EXACTLY?
Apparently, silver is supposed to be even one step better, yet. Don't know if the silverstone is actually silver or just marketing hype.
Anyway, copper wears faster (they don't last as long), so some people think they're doing you a favour by recommending another material type plug. (It doesn't matter in a NA engine).
Now getting back to the tip-breaking issue. I would certainly entertain a copper NGK if the f@#&king tips are prone to breaking with the Bosch!
So, what NGK plug would be a direct replacement for the stock bosch WR7DC (which is copper), EXACTLY?
#51
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Originally Posted by TurboTommy
The reason copper is recommended, is because it's a very good conductor to help with consistantly jumping the gap in a high pressure environment (turbocharged). That's the only reason.
Apparently, silver is supposed to be even one step better, yet. Don't know if the silverstone is actually silver or just marketing hype.
Anyway, copper wears faster (they don't last as long), so some people think they're doing you a favour by recommending another material type plug. (It doesn't matter in a NA engine).
Now getting back to the tip-breaking issue. I would certainly entertain a copper NGK if the f@#&king tips are prone to breaking with the Bosch!
So, what NGK plug would be a direct replacement for the stock bosch WR7DC (which is copper), EXACTLY?
Apparently, silver is supposed to be even one step better, yet. Don't know if the silverstone is actually silver or just marketing hype.
Anyway, copper wears faster (they don't last as long), so some people think they're doing you a favour by recommending another material type plug. (It doesn't matter in a NA engine).
Now getting back to the tip-breaking issue. I would certainly entertain a copper NGK if the f@#&king tips are prone to breaking with the Bosch!
So, what NGK plug would be a direct replacement for the stock bosch WR7DC (which is copper), EXACTLY?
#53
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You can get the silver from Bosch - wr7dS - S instead of C at the end. I have a set, but I haven't dyno-tested them. ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
Also - keep in mind guys that the difference is only seen when you are up against detonation - usually at very high output.
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Also - keep in mind guys that the difference is only seen when you are up against detonation - usually at very high output.
#55
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Maybe one of you highboosted cars could try out those iridiums. Ngk iridiums are between 6.50-8.50 a plug, and are supposed to be made specifically for the high engine output crowd ie motorcycles and force induced engines.
#57
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Just buy the NGK's and replace them often. You guys in the States can get them for $2 a pop, so you might as well. I can get them up here for $4CDN a pop, still well worth it for me. Plus we only have to buy 4! Cheap insurance/maintenance.