One Step Colder Plugs or Not?

COSMO · 02-24-2013, 08:56 PM

Iam almost completed installing my gtm tt stage 2 kit and after speaking with sam he recommended going with one step colder spark plugs but also said I didnt have too. How many others have or have not went went colder plugs? Keep in mind where I live we have 92-93 octane gas..

blackonorange · 02-24-2013, 09:02 PM

Gtr plugs

specialty z has em. Their iridium plugs heat range 8

Baer383 · 02-24-2013, 09:24 PM

I have a stage 1.5 GTM SC and I went 1 step colder,you won't see a difference by the seat of your pants but when you log it with ROM editor you can see that the timing is not being pulled back anymore.

tower74 · 02-24-2013, 09:43 PM

I went with heat range 9...the highest I found. It might not be needed but better safe than sorry. I picked up the HKS iridium plugs. Of course I don't have them any more but if Baer383 is saying go colder and sam is saying the same...listen to the ones who know best.

blackonorange · 02-24-2013, 09:47 PM

Quote:

Originally Posted by tower74

I went with heat range 9...the highest I found. It might not be needed but better safe than sorry. I picked up the HKS iridium plugs. Of course I don't have them any more but if Baer383 is saying go colder and sam is saying the same...listen to the ones who know best.

Ummm the hotter the more dangerous.....

Boost_lee · 02-25-2013, 03:25 AM

Quote:

Originally Posted by blackonorange

Ummm the hotter the more dangerous.....

He mentioned going up to a 9, which is colder than a plug at range 8 (higher # = colder plug, for NGK and Denso). You can go too cold also, but you'd probably see those effects during idle.

tower74 · 02-25-2013, 03:18 PM

Quote:

Originally Posted by blackonorange

Ummm the hotter the more dangerous.....

Umm 9 is not the heat it puts off

. The higher the number the colder the plug. If you are buying "hot" plugs and putting them in a turbo charged car you are asking for problems. That's why when you turbocharge a car or supercharge a car the colder the plug the faster it releases heat from the cylinder chamber. Which is what you want when you are boosting like hell. Just saying....

blackonorange · 02-25-2013, 03:41 PM

Quote:

Originally Posted by tower74

Umm 9 is not the heat it puts off

. The higher the number the colder the plug. If you are buying "hot" plugs and putting them in a turbo charged car you are asking for problems. That's why when you turbocharge a car or supercharge a car the colder the plug the faster it releases heat from the cylinder chamber. Which is what you want when you are boosting like hell. Just saying....

Hmmm I thought it was higher their number hotter the plug, I also thought the z came with 9, I guess that's why I thought higher was hotter.

tower74 · 02-25-2013, 03:57 PM

Quote:

Originally Posted by blackonorange

Hmmm I thought it was higher their number hotter the plug, I also thought the z came with 9, I guess that's why I thought higher was hotter.

Nahh , there should be a number somewhere on the plug to let you know the heat level. I'd have to look it up but I would guess they use the hot plugs from the factory since they are better for stop and go traffic. I put the 9's in my car for the "just in case" factor. I may not need it but when they cost the same as the 8's. Why not.

SS_Firehawk · 02-24-2013, 09:43 PM

I'm getting colder plugs as well on my build... Just after I bought brand new stock ones lol.

chrischhorn · 02-25-2013, 02:39 AM

Quote:

Originally Posted by SS_Firehawk

I'm getting colder plugs as well on my build... Just after I bought brand new stock ones lol.

I might have to take those off your hands SS....I wanna drop the gap on my plugs down a bit. Tuner says I'm getting a bit of blow out on the plugs up top plus I've got a really weird random misfiring thing going on that I hope can be changed with new plugs. I was running extremely rich for quite some time which could cause the premature wear.

SS_Firehawk · 02-25-2013, 09:44 AM

Quote:

Originally Posted by chrischhorn

I might have to take those off your hands SS....I wanna drop the gap on my plugs down a bit. Tuner says I'm getting a bit of blow out on the plugs up top plus I've got a really weird random misfiring thing going on that I hope can be changed with new plugs. I was running extremely rich for quite some time which could cause the premature wear.

Might have to get with me in PM's. GTM has my car and all the parts. I saw the new spark plugs in the invoice.

COSMO · 02-25-2013, 11:14 AM

I spoke with sam today from gtm and he said the stock plugs would be fine since Iam not running high boost and I have atleast 91 octane where live. Thanks again the help..

tturbo370z · 02-26-2013, 12:44 AM

Quote:

Originally Posted by SS_Firehawk

Might have to get with me in PM's. GTM has my car and all the parts. I saw the new spark plugs in the invoice.

I'm heading there on the 20th of march if you need any parts picked up or shipped out bro let me know. If it will fit with the extra parts I'm hauling back to AZ with me I can grab it and ship it out for ya. Just saying. Oh and did you get confirmation on the clutch from Sam? I forgot to ask when I talk to him today. Was suppose to be there saturday.

COSMO · 02-24-2013, 10:13 PM

Anyone have a part# at a local autoparts store??

02-24-2013, 08:56 PM	#1 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 20	One Step Colder Plugs or Not? Iam almost completed installing my gtm tt stage 2 kit and after speaking with sam he recommended going with one step colder spark plugs but also said I didnt have too. How many others have or have not went went colder plugs? Keep in mind where I live we have 92-93 octane gas..

02-24-2013, 09:02 PM	#2 (permalink)
blackonorange A True Z Fanatic Join Date: Jul 2011 Location: Saskatchewan Posts: 1,078 Drives: 09 370z Rep Power: 16	Gtr plugs specialty z has em. Their iridium plugs heat range 8 GaleForce likes this.

02-24-2013, 09:24 PM	#3 (permalink)
Baer383 A True Z Fanatic Join Date: Aug 2010 Location: Lawrenceville,Ga Posts: 4,293 Drives: My foot up your azz Rep Power: 30	I have a stage 1.5 GTM SC and I went 1 step colder,you won't see a difference by the seat of your pants but when you log it with ROM editor you can see that the timing is not being pulled back anymore. __________________ 2013 ZL1 754 rwhp 747 rwtq

02-24-2013, 09:43 PM	#10 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	I'm getting colder plugs as well on my build... Just after I bought brand new stock ones lol. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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02-24-2013, 09:43 PM	#4 (permalink)
tower74 A True Z Fanatic Join Date: Oct 2011 Location: KCMO Posts: 1,597 Drives: 2017 ZL1 Camaro Rep Power: 370	I went with heat range 9...the highest I found. It might not be needed but better safe than sorry. I picked up the HKS iridium plugs. Of course I don't have them any more but if Baer383 is saying go colder and sam is saying the same...listen to the ones who know best.

02-25-2013, 11:14 AM	#13 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 20	I spoke with sam today from gtm and he said the stock plugs would be fine since Iam not running high boost and I have atleast 91 octane where live. Thanks again the help..

02-24-2013, 10:13 PM	#15 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 20	Anyone have a part# at a local autoparts store??