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Old 06-27-2012, 09:08 AM   #1
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Default Resistorless spark plugs with COP?

I want to run a colder plug than the bkr7e's I have now. This means going to a resistorless plug like r5671a-8. Both are Ngk. Will this have any negative effect on my COP setup ?
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Old 07-04-2012, 07:50 PM   #2
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i know this may be old news but i ran ngk racing in a 7 heat in my 01 engine running 01 wasted cops and it messed with my cam sync to the ms3x. put in just ordinary ngkr's in a 7 and all was better. i have since switched to lsx coils but still run the r's.
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Old 07-06-2012, 06:09 AM   #3
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i need 8's, there is no such thing as a bkr8e, i have to go to a resistorless racing plug for a 8
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Old 07-06-2012, 09:59 AM   #4
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switched to resistorless a little while ago to try to get better spark out of my batch fired COPs...didn't work but still have the plugs in and they do what they're supposed to.
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Old 07-06-2012, 10:09 AM   #5
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Quote:
Originally Posted by ctdrftna View Post
i need 8's, there is no such thing as a bkr8e,
BKR8EIX, stock # 2668.

NGK.com - Application Search Results
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Old 07-06-2012, 10:33 AM   #6
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Those are iridium correct? I want to stay with a standard plug. The part number I posted it a standard v- power racing plug. Just resistor less. If they have no negative affect because of the added electrical noise then I will run them. The only thing I have read is that they mess with your radio, but I don't have one so that won't affect me. I just wanted to know if anyone has experience with resistor less plugs
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Old 07-06-2012, 12:09 PM   #7
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your MS probably wont like them...
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Old 07-06-2012, 12:24 PM   #8
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I use resistorless plugs in the XP car.

I've noticed the Link ECU keypad sometimes goes haywire after a run. I think I'll try putting some capacitors in the power system for the ECU. No dyno proof but the car felt better at the high boost. I haven't had a misfire or the ECU go 100% nuts, just the keypad displaying junk. Power cycle it and everything is ok.
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Old 07-14-2012, 06:23 PM   #9
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Denso has a resistor plug of the proper size, in a heat range comparable to the NGK 8, that is not precious metal. K24PR-U11
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Old 07-14-2012, 06:26 PM   #10
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im still not convinced we need any colder than 7.

Next time I buy plugs im going back to stock 1.6L ones. Just considering they went 1 step hotter with the 1.8L.
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Old 07-14-2012, 07:08 PM   #11
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I run resistorless plugs without any issues. Frankly I think it will run exactly the same with "normal" 7 heat range plugs. LS coils >>>>>> any magic spark plug

These are my current plugs - same as Flying Miata sells
NGK Spark Plugs 4091 - NGK Racing Spark Plugs - Overview - SummitRacing.com


Quote:
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i need 8's, there is no such thing as a bkr8e, i have to go to a resistorless racing plug for a 8
No, you don't
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