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What plugs are the best for high HP GTRs?

8897 Views 16 Replies 14 Participants Last post by  GTR001, 
paparazzi
I use HKS Heat Range 9. Are there any other good contenders?
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A
paparazzi said:
I use HKS Heat Range 9. Are there any other good contenders?
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perfect choice.
just stay with HKS 45HL they are the best.
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gripforce-gtr
One of the top GTR shop recommends stock plugs no matter what power level you're in and that's what I have in my 770whp car.
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Dave@GotboostPerformance
gripforce-gtr said:
One of the top GTR shop recommends stock plugs no matter what power level you're in and that's what I have in my 770whp car.
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+1
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heacuva
gt-r is behaving the plugs very nicely unlike many similar cars running the same hp level so you will most likely be fine for both stock and hks plugs.
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seanm
The stock plugs are a heat range 8, which generally speaking is a pretty cold plug. As cold as a normal/race style plug I know of is about a 10 in a NGK range.

The stock plug is a double fine wire plug. Run off a coil on plug setup.


http://www.2009gtr.com/2008/02/you-need-ne...lug-socket.html

On the race car RB26 powered GT-R's we used the handbuild NGK iridum non projector tip, fine wire plugs. http://www.gtrusablog.com/2010/05/rb26dett...park-plugs.html


The old HKS iridium plugs used to be Densos, which I don't recommend for any car or lawnmower.
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ALPHA Performance
We use stock plugs on even our 1360whp ALPHA 12 shop car


Eric
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NNL21
gripforce-gtr said:
One of the top GTR shop recommends stock plugs no matter what power level you're in and that's what I have in my 770whp car.
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+1 ... I have discussed this with my tuner about changing plugs several times....and he always asked me to keep the stock...and i trust him.
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N
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JapLove
The non projector type NGK plugs are stupid crazy expensive plugs. Like $39 a piece or something if I recall. They are the best from the people I hear who use them but not often used. I'm a big fan of Iridium NGK plugs in a 8 or 9 heat range. I've used 10 before in other street cars but it probably wasn't needed.
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seanm
NickTO said:
I use the NGK-R R2558A-9


It's the non-projector type Sean described.

NGK website: http://www.ngk-sparkplugs.jp/english/racei...g/01/index.html
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Nismo used the same/similar on the Super Taikyu cars. If you are road racing, running some heat in the engine, its something to consider.

http://www.nismo.co.jp/en/products/competi...df/engine02.pdf

Most guys don't like the price on them, but they do work. Never had any luck with other plugs on the RB engines.
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seanm
soundeffects said:
The non projector type NGK plugs are stupid crazy expensive plugs. Like $39 a piece or something if I recall. They are the best from the people I hear who use them but not often used. I'm a big fan of Iridium NGK plugs in a 8 or 9 heat range.
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I like the NGK Iridium- ix for street cars. They are fine. However, once you start to really run a car hard. Not street light to street light. Not 60-130. Not 1/4 mile at a time. You need a plug that is not going to be a hot spot in the combustion chamber. You need something that will fire in a combustion chamber under harsh conditions.

The double fine wire non projector - $40 each plugs are that. Think about this a 600 hp V-6 car is making 100 hp per hole. Any misfire can be costing you that 100 hp per hole. Not a big issue with the relatively new VR engine, but as the cars get older, the bits and pieces get some miles on them, its something to consider.
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Dyjo1
Nickto, does the NGK-R come pre gapped to the GT-R specs and where did you buy them from?
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SP Engineering
[email protected] said:
I like the NGK Iridium- ix for street cars. They are fine. However, once you start to really run a car hard. Not street light to street light. Not 60-130. Not 1/4 mile at a time. You need a plug that is not going to be a hot spot in the combustion chamber. You need something that will fire in a combustion chamber under harsh conditions.

The double fine wire non projector - $40 each plugs are that. Think about this a 600 hp V-6 car is making 100 hp per hole. Any misfire can be costing you that 100 hp per hole. Not a big issue with the relatively new VR engine, but as the cars get older, the bits and pieces get some miles on them, its something to consider.
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+1

We have experienced misfire's due to using factory plugs at a certain high HP. It is better safe to consider changing plugs out while you're installing injectors.
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JDMR35
AMS said:
We use stock plugs on even our 1360whp ALPHA 12 shop car


Eric
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Really? Well that settles it for me then! Stock it is! Haha
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G
Hello
How often do we need to change spark plugs?

Thanks!
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