platinum 4 spark plugs
12-13-2002, 09:06 PM
#3
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Strangely enough I found a listing for a +4 on the Bosch site that is manufactured for a 2000 Honda S2000. It's part # 4417. They don't seem to be available at Canadian Tire yet, but are supposedly available at Schucks in Seattle. I'll find out for sure on the weekend.
12-14-2002, 12:06 PM
#5
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Don't do it! I've had the Bosch platinum +4 on my 00 Civic Si and 90 Accord and they caused bogging off the line in both cars. I even had a standard Bosch platinum plug on some other cars and everytime, it would cause bogging. Soon as I swapped them out for the OEM plugs, no bogging.
The 2k Civic Si B16a is sorta like the F20c with the high redline (8k, 1k short of our motors) and VTEC changeover at 5-6k rpms, so I would expect that the plugs would cause similar behavior to my Si with the bogging.
The 2k Civic Si B16a is sorta like the F20c with the high redline (8k, 1k short of our motors) and VTEC changeover at 5-6k rpms, so I would expect that the plugs would cause similar behavior to my Si with the bogging.
12-14-2002, 12:32 PM
#6
I really don't think there is power to be gained just by changing spark plugs, unless it is because of a "better" heat range. I went with the Denso Iridium IK24 (1 step colder than OEM) in my basically stock motor, and they are great. I think it helps prevent the loss of power when it is hot outside.
I think that Honda picked a spark plug with a relatively hot heat range, so that the plugs wouldn't foul out during very short drives to / from the corner market. If you live in a hot climate, and drive far enough each trip to fully heat the plug, the colder plug is better.
I haven't had any good experiences with Bosch plugs either. I think the main benefit of the platinum tip is longevity, not performance. I have always believed that copper plugs provided better performance than platinum, but had to be changed more often. The Iridium plugs, from what I hear, is actually the best of both: long life AND good performance.
I think that Honda picked a spark plug with a relatively hot heat range, so that the plugs wouldn't foul out during very short drives to / from the corner market. If you live in a hot climate, and drive far enough each trip to fully heat the plug, the colder plug is better.
I haven't had any good experiences with Bosch plugs either. I think the main benefit of the platinum tip is longevity, not performance. I have always believed that copper plugs provided better performance than platinum, but had to be changed more often. The Iridium plugs, from what I hear, is actually the best of both: long life AND good performance.
12-16-2002, 12:22 PM
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I was also thinking of switching, but I did a search (from MSN home page, not this forum search) and found some very negative reviews. Actually they were all negative. I think most were from Miata and either Porsche or Audi forums. Very similar problems that DouglaS2000 stated.
