Spark plug comparison - pictures
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From: Los Angeles/Orange County
Today I just switched my spark plugs to Bosch Platinum 2's. Whoa what a difference. These plugs came pregapped from Bosch so all you need to do is torque them in to spec. I highly recommend these spark plugs. They cost only $3.99 each and they are double platinum coated! 
Thread Starter
Joined: Mar 2001
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Originally Posted by CwestinAP1,Oct 3 2004, 10:26 PM
Today I just switched my spark plugs to Bosch Platinum 2's. Whoa what a difference. These plugs came pregapped from Bosch so all you need to do is torque them in to spec. I highly recommend these spark plugs. They cost only $3.99 each and they are double platinum coated!
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Joined: May 2003
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From: Los Angeles/Orange County
yep, these were already gapped to spec . Part# 4303 "PLATINUM2 VTEC; F20C1; Do not Gap " "Electrode gap is factory set Provides ease of installation - never requires adjustment"as it says on Bosch's website. double checking is always good tho, but it is not necessary w/ these 4303 plugs. has anyone else tried the bosch platinum 2's?
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Joined: Jun 2001
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From: Santa Rosa
Yes, I use the Bosch Platinum2 and have no problems with them.
My engine is stock with a homebrew intake (3" PVC pipe and a generic conical filter in an air box) and a butchered Honda header (to fit in my non-Honda car). Using the Bosch Platinum2 plugs and and an AEM ECU, I see a bit over 220 hp at the rear wheels with a DynaPack dyno. That's at just over 8500 RPM. No misfiring there!
With modern electronics and a coil sitting on top of each plug, I've got to wonder if misfiring is ever a problem with the F20C.
My engine is stock with a homebrew intake (3" PVC pipe and a generic conical filter in an air box) and a butchered Honda header (to fit in my non-Honda car). Using the Bosch Platinum2 plugs and and an AEM ECU, I see a bit over 220 hp at the rear wheels with a DynaPack dyno. That's at just over 8500 RPM. No misfiring there!
With modern electronics and a coil sitting on top of each plug, I've got to wonder if misfiring is ever a problem with the F20C.
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Joined: Mar 2001
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I needed to link this thread for someone and it reminded me to post the following:
A couple weeks after I came back from my 3500 miles driving vacation, my engine developed a very faint miss in the high rpm range, under load, WOT. It was not enough to throw a CEL but it still have me concerned. I was still running the IK-24s since I started this thread. I took them out and they looked quite "normal". Replaced them with an old set of the cleaned off NGK coppers. The miss has disappeared and has not returned now after a couple more weeks of driving.
I'm not sure what conclusion I can make at this point. Just a heads up for you folks.
A couple weeks after I came back from my 3500 miles driving vacation, my engine developed a very faint miss in the high rpm range, under load, WOT. It was not enough to throw a CEL but it still have me concerned. I was still running the IK-24s since I started this thread. I took them out and they looked quite "normal". Replaced them with an old set of the cleaned off NGK coppers. The miss has disappeared and has not returned now after a couple more weeks of driving.
I'm not sure what conclusion I can make at this point. Just a heads up for you folks.
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From: Do You have a HoNda?
Ive rcently instgalled some NGk iridium racing plugs. I`ve noticed that the idling along with the power delivery is much smoother. I was going to install the Denso Iridiums but was told not to by J's Racing. Anyway some pics for comparison:
