What NGK copper sparkplugs?
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From: Zionsville, IN
Originally Posted by Momentum,May 13 2010, 11:24 PM
Knock or detonation can break the tip off an iridium plug, I've seen it on dozens of cars.
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Originally Posted by Momentum,May 13 2010, 07:24 PM
Actually regardless of the tip size the arc will only be between the very sharp corners of the electrode. The only advantage to iridium plugs is longevity. There is no way having a non resistor plug would cause misfiring. Sounds like you might be running to rich? I can't really think of a good reason you would have had a problem with those plugs that was solved (only?) by changing plugs to iridiums... I run non resistor plugs in both my cars like I said and my TA car runs on strait ethanol (which would only misfire worse) and it never misses.
Knock or detonation can break the tip off an iridium plug, I've seen it on dozens of cars.
Knock or detonation can break the tip off an iridium plug, I've seen it on dozens of cars.
As far as knock and detonation goes, I would not consider it a normal condition.
Whats your input on the strength on the ignition system of the s2000 overall? How does it hold up to e100? What powerlevels are you talking about?
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From: Sellersburg, IN
Here is a list of the NGK spark plugs off their site. http://www.ngksparkplugs.com/docs/product_list.pdf
It shows all the resistor and non resistor plugs. If you notice, most lower boosted S's run the BKR7E "non resistor projected", which measures out at 14mm, 3/4 reach and 5/8 hex. So, there are many others with these measurements that are "resistor projected" that will work with our car in the 8 heat range that I think will be better than any of the non resistor plugs. I dont know what ISO is though. I found the part number R7233-8, stock number 5974 but there are others. What do you guys think?
It shows all the resistor and non resistor plugs. If you notice, most lower boosted S's run the BKR7E "non resistor projected", which measures out at 14mm, 3/4 reach and 5/8 hex. So, there are many others with these measurements that are "resistor projected" that will work with our car in the 8 heat range that I think will be better than any of the non resistor plugs. I dont know what ISO is though. I found the part number R7233-8, stock number 5974 but there are others. What do you guys think?
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Not quite as easily as it can break the tips off the plugs haha, but a valid point. It's almost certain that if you are tuning for the edge that you will knock at some point (hopefully just once on the dyno) but I'd rather know my plugs not going to crack if that happens.
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From: Zionsville, IN
I've never had that issue with the iridiums, ever. And I've had them in 2 different cars at 700+whp, and one car with 600+whp. Plus a 1000+whp race car....haha
Like I said, everyone has their preferences. You aren't going to find a product on the planet that someone hasn't had troubles with. Finding out the reason why is the hard part.
Like I said, everyone has their preferences. You aren't going to find a product on the planet that someone hasn't had troubles with. Finding out the reason why is the hard part.
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I have stock AP1 coils and R5671A-10 plugs and have no problem running at 600whp. I have plans to make more soon and don't foresee the need to upgrade. I still have the plugs gapped as they came out of the box.
ISO is a international standard, not sure how it's relevant though?
ISO is a international standard, not sure how it's relevant though?
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From: Sellersburg, IN
Originally Posted by Momentum,May 13 2010, 10:30 PM
I'm not buying the electrical interference from a non resistor plug causing problems with anything but your radio or radar detector (i'm really not even buying the radio). I have 4 separate logging/control modules on my car and a beacon and have NEVER even had a glitch. They all run on a CAN bus which is notoriously susceptible to noise. That said I posted a part number for a 8 heat range copper plug with a resistor above
These are the exact problems I was having with the 7173 non resistor plugs.
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From: Zionsville, IN
I have no idea why anyone would even run a non resistor plug? Why? Especially in a car that came from the factory with resistor plugs.
I understand the difference in materials, heat ranges, etc. That's a legitimate reason to choose a certain plug, but putting non resistors plugs in an S2000 is beyond me??? Hell, it obviously works for some people, but I just don't get why you would choose to go that route?
I understand the difference in materials, heat ranges, etc. That's a legitimate reason to choose a certain plug, but putting non resistors plugs in an S2000 is beyond me??? Hell, it obviously works for some people, but I just don't get why you would choose to go that route?
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Read it, I've probably tuned 100+ cars with non resistor plugs and like I said the only thing I have ever had a problem with is radar detectors. That's not to say it doesn't happen but I haven't come across it yet. I would bet anything that I could tune your car to run perfect on those 7173s. The iridiums or resistors might be covering up some other problem but I guarantee the problem isn't the plugs.
Well for one reason, find me a 10 heat range resistor plug... or a 9 for that matter.
(copper only i would never put an iridium or platinum plug in my car)
Well for one reason, find me a 10 heat range resistor plug... or a 9 for that matter.
(copper only i would never put an iridium or platinum plug in my car)
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From: Sellersburg, IN
Originally Posted by boostedf22c,May 13 2010, 10:41 PM
I've never had that issue with the iridiums, ever. And I've had them in 2 different cars at 700+whp, and one car with 600+whp.
Like I said, everyone has their preferences. You aren't going to find a product on the planet that someone hasn't had troubles with. Finding out the reason why is the hard part.
Like I said, everyone has their preferences. You aren't going to find a product on the planet that someone hasn't had troubles with. Finding out the reason why is the hard part.