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GT-R spark plugs on N/A 370z

Any thoughts on using GT-R plugs for an N/A z34? I have exhaust intake and a tune. And frequent pinging when it's cold. Thank you!

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Old 07-26-2016, 08:47 PM   #1 (permalink)
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Exclamation GT-R spark plugs on N/A 370z

Any thoughts on using GT-R plugs for an N/A z34?

I have exhaust intake and a tune. And frequent pinging when it's cold.

Thank you!
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Old 07-26-2016, 09:32 PM   #2 (permalink)
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Are your plugs running too hot? That would be the only reason to change to cooler plugs used in the GTR. Your detonation is most likely poor fuel or too much base timing.
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Old 07-27-2016, 04:57 PM   #3 (permalink)
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Originally Posted by osbornsm View Post
Any thoughts on using GT-R plugs for an N/A z34?

I have exhaust intake and a tune. And frequent pinging when it's cold.

Thank you!
Sounds like your tune needs help. I ran FI for a little while on stock plugs and didn't experience any pinging.
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Old 07-27-2016, 06:29 PM   #4 (permalink)
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^ what he said ............ suspecting cold-start map fubar'd
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Old 07-27-2016, 07:19 PM   #5 (permalink)
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Quote:
Originally Posted by osbornsm View Post
Any thoughts on using GT-R plugs for an N/A z34?

I have exhaust intake and a tune. And frequent pinging when it's cold.

Thank you!
I think the Tuner tuned it too lean.
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Old 07-27-2016, 09:10 PM   #6 (permalink)
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I feel colder plugs will make your car run worse... No?
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Old 07-27-2016, 09:57 PM   #7 (permalink)
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I feel colder plugs will make your car run worse... No?
Not if he's experiencing early detonation... or am I missing something?

Either way, a N/A Z should never need to play musical spark plugs.
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Old 07-28-2016, 09:47 AM   #8 (permalink)
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If he's suffering preignition due to overheated plugs and valves, then a cooler plug could help. The symptom he describes sounds like detonation and colder plugs won't help.
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Old 07-28-2016, 02:14 PM   #9 (permalink)
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Originally Posted by Slartibartfas View Post
If he's suffering preignition due to overheated plugs and valves, then a cooler plug could help. The symptom he describes sounds like detonation and colder plugs won't help.
The plugs aren't actually colder, they're the same rating as the OEM plugs. Just smaller gap.
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Old 07-28-2016, 02:19 PM   #10 (permalink)
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I think the Tuner tuned it too lean.
I get 2-3 degrees of pulled timing when I see the CEL and monitor via OBD.
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Old 07-28-2016, 04:55 PM   #11 (permalink)
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iv been running on gtr spark plugs for the past 7,000 miles no issues so far
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