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Have any of you changed the plugs yet? What did you use -- Denso? NGK? Other? I am ready to do mine and want to go with NGK's and thought
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#1 (permalink) |
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Have any of you changed the plugs yet? What did you use -- Denso? NGK? Other?
I am ready to do mine and want to go with NGK's and thought I'd see who has any experience. Thanks and have a great day.
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#2 (permalink) |
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NGK DILKAR8A8 is your best bet for a boosted car. Those are the OEM GT-R plug and we have had great success switching to those in our boosted z's. A much more appropriate gap right out of the box.
For a N/A car just stick with the OEM plugs which should be a NGK DILKAR7B11 or Denso FXE24HR-11. The Denso 24 is more like an NGK 8 when it comes to heat range. The hotter plug might make more power on your N/A car but it will put you closer to detonation. NGK is the way the go for boosted cars using the GT-R plug. If I was going to keep it N/A I would just rock the true OEM Denso FXE24HR-11. Thanks, Alex Goodwin AlexG@motionlabtuning.com |
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What's the replacement interval for spark plugs under normal driving? I'm at about 40k miles.
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The OEM service interval for both "normal" and "severe" driving conditions is 105,000mi. I couldnt IMAGINE running on a single set of plugs that long. When the car is N/A I would recommend pulling and checking the gaps every 30,000-45,000 miles and replacing as necessary. For a boosted car I would plan to REPLACE every 30,000 - 45,000. This will keep you running at peak performance and prevent misfires and detonation from worn plug gaps.
Just my .02 Thanks, Alex Goodwin AlexG@motionlabtuning.com |
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Thanks, Alex Goodwin AlexG@motionlabtuning.com |
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Not sure what type, I think NGK Iridium long life. Its a stock 93 R33 skyline. I have never checked them also. Some lucky person will buy it soon. Hoping the 370z is built just as good.
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After having a nice weekend drive roughly 5 cylinders greeted me on a cold start this morning. The car was idling rough, and the fuel smell was very strong. I shut off the engine and started it again with no improvements. It didn't struggle to start, though.
I'm thinking it's the spark plug(s). Would anyone agree?
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My '03 Sport Trac has 140K kms or 85K miles with the original plugs. Doesn't miss a beat!
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