Colder Plugs for VQHR

The Guy · 06-19-2009, 11:20 AM

Where do you purchase one step colder plugs for the VQ35HR? I have found numerous sites for the DE motor but I know they are not the same plugs. NGK site does not list having a spark plug for the 07-08 z, any information would be helpful.

I just purchased a Zex kit with all the goodies, looking for spark plugs so I can do the install all at the same time.

Thanks!

350z 6spd · 06-19-2009, 12:37 PM

stock 370z plugs

coachk · 06-19-2009, 12:40 PM

..

coachk · 06-19-2009, 12:41 PM

Links not working....just go to www.gtmotorsports.com

advance search and type in colder plugs

The Guy · 06-19-2009, 12:47 PM

Quote:

Originally Posted by coachk

..

Thats 200+ with shipping for spark plugs!!

So stock 370z plugs are 1 step colder for VQ35HR? I would probably have to go through the dealership to purchase them.

350z 6spd · 06-19-2009, 12:53 PM

Quote:

Originally Posted by The Guy

Thats 200+ with shipping for spark plugs!!

So stock 370z plugs are 1 step colder for VQ35HR? I would probably have to go through the dealership to purchase them.

Yes. The 370 plugs are a Denso fxe24hr11 and the stock 350 hr plugs are a Denso fxe22hr11. I got them at my local dealer for wholesale which was 8.xx a piece, courtesy sells them for 9.90 a piece. Though for some reason courtesy is listing the 370z plugs as fxe22hr11, the ones I got from my dealer were definitely fxe24hr11.

The Guy · 06-19-2009, 01:08 PM

Quote:

Originally Posted by 350z 6spd

Yes. The 370 plugs are a Denso fxe24hr11 and the stock 350 hr plugs are a Denso fxe22hr11. I got them at my local dealer for wholesale which was 8.xx a piece, courtesy sells them for 9.90 a piece. Though for some reason courtesy is listing the 370z plugs as fxe22hr11, the ones I got from my dealer were definitely fxe24hr11.

Great information!! Thanks a lot that will save my quit a bit of money.

Is this a platinum plug? Is that ok for a nitrous application?

350z 6spd · 06-19-2009, 01:16 PM

Quote:

Originally Posted by The Guy

Great information!! Thanks a lot that will save my quit a bit of money.

No problem

Italianjoe1 · 06-19-2009, 02:29 PM

I wouldn't run platinums with nitrous, the smaller electrode can cause detonation, it gets much hotter while spraying than it is designed to do and can start to act like a glow plug.

Copper plugs are the best bet for nitrous apps. They are also much cheaper, so if you are really worried just change them more often, still cheaper than a set of platinums and they work better.

350z 6spd · 06-19-2009, 03:13 PM

The densos are iridium not platinum. I'm almost positive that nobody makes one step colder copper plugs for the hr, or at least no one did when I bought them and when everyone was discussing it a few months ago.

3hree5ive0ero · 06-19-2009, 11:27 PM

For nitrous application, copper plugs are highly recommended. Iridiums will work, but I'd check those often, especially right after you install your nitrous and test them, just in case. Platinums are a no-no.

The Guy · 07-17-2009, 07:04 AM

370z plugs work great, no problems with idle or when spraying. Il be checking them on my next oil change just to make sure.

stinky350z · 12-13-2009, 06:41 PM

i need to replace my oem spark plugs on my hr what plugs should i use ,
ive seen the hks ones

can i use the 370z ones?

stinky350z · 12-13-2009, 06:58 PM

thanks 350z_6spd

06-19-2009, 11:20 AM	#1
The Guy Registered User Join Date: Nov 2008 Location: BR Posts: 84 iTrader: (1)	Colder Plugs for VQHR Where do you purchase one step colder plugs for the VQ35HR? I have found numerous sites for the DE motor but I know they are not the same plugs. NGK site does not list having a spark plug for the 07-08 z, any information would be helpful. I just purchased a Zex kit with all the goodies, looking for spark plugs so I can do the install all at the same time. Thanks!

06-19-2009, 12:37 PM	#2
350z 6spd Lurker Join Date: Nov 2006 Location: Wellington, FL Posts: 390 iTrader: (5)	stock 370z plugs __________________ '07 NISMO #273 REDLINE- SFZCC

06-19-2009, 12:40 PM	#3
coachk Living in 350Z Join Date: Dec 2003 Location: Florida Posts: 4,741 iTrader: (21)	.. Last edited by coachk; 06-19-2009 at 12:43 PM.

06-19-2009, 02:29 PM	#9
Italianjoe1 Registered User Join Date: Dec 2008 Location: Miami, FL Posts: 543 iTrader: (1)	I wouldn't run platinums with nitrous, the smaller electrode can cause detonation, it gets much hotter while spraying than it is designed to do and can start to act like a glow plug. Copper plugs are the best bet for nitrous apps. They are also much cheaper, so if you are really worried just change them more often, still cheaper than a set of platinums and they work better. __________________ Old car: 06 Cobalt SS ..... New car: 08 Nismo, #1456

06-19-2009, 03:13 PM	#10
350z 6spd Lurker Join Date: Nov 2006 Location: Wellington, FL Posts: 390 iTrader: (5)	The densos are iridium not platinum. I'm almost positive that nobody makes one step colder copper plugs for the hr, or at least no one did when I bought them and when everyone was discussing it a few months ago. __________________ '07 NISMO #273 REDLINE- SFZCC

06-19-2009, 12:41 PM	#4
coachk Living in 350Z Join Date: Dec 2003 Location: Florida Posts: 4,741 iTrader: (21)	Links not working....just go to www.gtmotorsports.com advance search and type in colder plugs

06-19-2009, 11:27 PM	#11
3hree5ive0ero - A d m i n i s t r a t o r - 2003 Nissan 350Z Join Date: Dec 2020 Location: Dallas Posts: 1,337,010,631 iTrader: (50)	For nitrous application, copper plugs are highly recommended. Iridiums will work, but I'd check those often, especially right after you install your nitrous and test them, just in case. Platinums are a no-no. __________________ -\|\|- 252.75whp 233.16wtq (5/26/07 - N/A with bolt-ons) -\|\|-13.212@104.75mph (4/6/07 - N/A with 4 bolt-ons)-\|\|- -\|\|- 304.6whp ???wtq (1/31/09 - 75 shot of N2O) -\|\|- 12.520@110.17mph (11/16/08 - 75 shot of N2O) -\|\|- -\|\|- 315.3whp ???wtq (1/31/09 - 100 shot of N2O) -\|\|- 12.288@107.12mph (11/22/09 - 100 shot of N2O, dying clutch, & no 5th gear) -\|\|-

07-17-2009, 07:04 AM	#12
The Guy Registered User Join Date: Nov 2008 Location: BR Posts: 84 iTrader: (1)	update 370z plugs work great, no problems with idle or when spraying. Il be checking them on my next oil change just to make sure.

12-13-2009, 06:41 PM	#13
stinky350z Registered User Join Date: May 2008 Location: el paso tx Posts: 797 iTrader: (5)	i need to replace my oem spark plugs on my hr what plugs should i use , ive seen the hks ones can i use the 370z ones?

12-13-2009, 06:58 PM	#14
stinky350z Registered User Join Date: May 2008 Location: el paso tx Posts: 797 iTrader: (5)	thanks 350z_6spd

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