Sr2o Spark Plugs... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

traxx07 · 11-05-2009, 01:13 AM

I have check on the search thing and was getting different answers.

Enjuku says the heat range 6 is good for stock turbo up to 12psi.

Others say to use the heat range 7 if your boosting your stock turbo over the stock 7psi.

LMK which is better... perferably people with experience.

traxx07 · 11-05-2009, 01:27 AM

Nobody? Well going to sleep please answer if you know ...thanks in advance!

*let5l1de* · 11-05-2009, 04:12 AM

Did you upgrade your turbo? If not and it's a daily, BKR6EIX. Yes iridium. The main factor for me is superior heat dissipation and longevity of the spark plug.

oh btw: feel free to search...

~m

DoriftoPnoy · 11-05-2009, 04:52 AM

yea i'd get a step colder if u plan on running more than stock boost. I detonated because the spark was literally being blown out at 20 psi on ngk bkr6eix. haha

HYPNOTIK · 11-05-2009, 05:09 AM

Quote:

Originally Posted by DoriftoPnoy

I detonated because the spark was literally being blown out at 20 psi on ngk bkr6eix. haha

What? That doesn't even make sense. And why were you running 20psi on a stock turbo? Besides if your spark was blowing out you either need to check your gap or get new coilpacks, it has nothing to do with the heat range.

I'm running a stock 14 turbo at 14psi with no issues on 6's, if you want 7's then get them. Your not going to notice a difference.

DoriftoPnoy · 11-05-2009, 05:17 AM

ok well not literally being blown out but my spark plugs would overheat and no spark

jr_ss · 11-05-2009, 06:45 AM

You'll be fine with heat range 7's. You can get Iridium for longevity or go with NGK V-power's for cheap and have just as good of a plug.

HYPNOTIK · 11-05-2009, 09:11 AM

Quote:

Originally Posted by DoriftoPnoy

ok well not literally being blown out but my spark plugs would overheat and no spark

If you have too hot of spark plugs your car will do 1 of two things; either blow up from detonation or run like shit because the computer will sense that it's knocking and pull timing and dump fuel to keep the motor safe.

usdm180sx · 11-05-2009, 09:30 AM

I just replaced my NGK BKR7EIX with Nissan

PN 22401-20J07 BKR7E cost me $2.90 each

Gap to .28

sr20det with fuel pump, fmic and adjustable wastegate actuator set to 11 lbs.

runs perfect

*Dousan_PG* · 11-05-2009, 09:43 AM

ive always used bkr7e
made anywhere from 300 - 380 hp
no problems.

*let5l1de* · 11-05-2009, 12:01 PM

Typically, for every 75-100 hp you add, you should go one step colder on the spark plug's heat range. Also, a poor tune that leads to higher cylinder temps may require a colder range plug (improper fix but often performed). Many other factors such as, engine speed, load, Air/fuel mixer, fuel type/quality, timing, compression ratio, turbo size and even air temperature and pressure must be examined when considering a colder or hotter (rare to go hotter) spark plug heat range.

So when you ask "LMK which is better..." you need to consider these factors listed above and come up with a solution that best fits your application. Remember, changing the heat range of a plug should not be based on "LMK which is better...". It should be based on the spark plug firing end temperature. End temps must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. This is called “Thermal Performance”, and is determined by the heat range selected.

IMO you will be fine with a heat range of 6 or 7 on an engine near factory power ratings, tuned to factory settings and do not see higher RPM's for long periods of time. If you run your engine very hard often, consider 7.

Selecting spark plug conductive material is a personal choice as (Norm expressed).

Selecting the heat range for optimum "Thermal Performance" is not a personal choice, its a requirement based on your engines needs...

~m

traxx07 · 11-05-2009, 06:15 PM

Ummmm ok ....

S13 Redtop
Stock t25
Greddy RSPL FMIC Kit
Walbro 255
AEM Tru Boost (10psi-12psi)

Like I said Enjuku says to run the 6 with stock turbo up to 12psi and a lot of people have been saying to run the 7 with anything higher then the stock boost level on the t25. Hence why I'm asking which is better...

Ill go with the 7 just to be safe thanks for yalls help and I did use the search button and thats where I found different opinions. Next time read.

*let5l1de* · 11-05-2009, 08:37 PM

Quote:

Originally Posted by traxx07

Ummmm ok ....

S13 Redtop
Stock t25
Greddy RSPL FMIC Kit
Walbro 255
AEM Tru Boost (10psi-12psi)

Like I said Enjuku says to run the 6 with stock turbo up to 12psi and a lot of people have been saying to run the 7 with anything higher then the stock boost level on the t25. Hence why I'm asking which is better...

Ill go with the 7 just to be safe thanks for yalls help and I did use the search button and thats where I found different opinions. Next time read.

I read it the first time. Continue to search...

Don't be discouraged. I still use the search feature, sometimes to confirm what I already know and what kind of experience one would have been through on a specific topic. Think of it as constantly comparing notes, because the game does change from time to time.

GL to you and your 7's! 

~m

*fliprayzin240sx* · 11-05-2009, 08:56 PM

BCPR7ES...gap them down to .030-.028 and only cost $1.25 a pop.

11-05-2009, 01:13 AM	#1
traxx07 Zilvia Junkie Join Date: Dec 2008 Location: san antonio Age: 21 Posts: 579 Trader Rating: (6)	Sr2o Spark Plugs... I have check on the search thing and was getting different answers. Enjuku says the heat range 6 is good for stock turbo up to 12psi. Others say to use the heat range 7 if your boosting your stock turbo over the stock 7psi. LMK which is better... perferably people with experience.

11-05-2009, 04:12 AM	#3
let5l1de premium bullsh!t sifter Join Date: Dec 2007 Location: 626DRIFT, ca Posts: 1,053 Trader Rating: (23) Rides Gallery: let5l1de	Did you upgrade your turbo? If not and it's a daily, BKR6EIX. Yes iridium. The main factor for me is superior heat dissipation and longevity of the spark plug. oh btw: feel free to search... ~m __________________ Don't Know How To Install? IM/PM Read My Sales Review 626 Friday Nights San Gabriel

11-05-2009, 04:52 AM	#4
DoriftoPnoy Zilvia Addict Join Date: Apr 2005 Location: SoCal 818 Posts: 670 Trader Rating: (2)	yea i'd get a step colder if u plan on running more than stock boost. I detonated because the spark was literally being blown out at 20 psi on ngk bkr6eix. haha __________________

11-05-2009, 05:17 AM	#6
DoriftoPnoy Zilvia Addict Join Date: Apr 2005 Location: SoCal 818 Posts: 670 Trader Rating: (2)	ok well not literally being blown out but my spark plugs would overheat and no spark __________________

11-05-2009, 06:45 AM	#7
jr_ss Zilvia Addict Join Date: Dec 2005 Location: Venice, Fl Posts: 642 Trader Rating: (10)	You'll be fine with heat range 7's. You can get Iridium for longevity or go with NGK V-power's for cheap and have just as good of a plug. __________________ Built 95' S14....

11-05-2009, 01:27 AM	#2
traxx07 Zilvia Junkie Join Date: Dec 2008 Location: san antonio Age: 21 Posts: 579 Trader Rating: (6)	Nobody? Well going to sleep please answer if you know ...thanks in advance!

11-05-2009, 09:30 AM	#9
usdm180sx Post Whore! Join Date: Dec 2005 Location: 562/310/626/323/213/818 Posts: 3,518 Trader Rating: (3) Rides Gallery: usdm180sx	I just replaced my NGK BKR7EIX with Nissan PN 22401-20J07 BKR7E cost me $2.90 each Gap to .28 sr20det with fuel pump, fmic and adjustable wastegate actuator set to 11 lbs. runs perfect __________________ -Norm! http://i97.photobucket.com/albums/l2.../koukisig2.jpg Last edited by usdm180sx; 11-05-2009 at 01:19 PM.

11-05-2009, 09:43 AM	#10
Dousan_PG Pink GodziRa Join Date: May 2002 Location: Orange County, California Age: 30 Posts: 16,322 Trader Rating: (10) Rides Gallery: Dousan_PG	ive always used bkr7e made anywhere from 300 - 380 hp no problems. __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

11-05-2009, 12:01 PM	#11
let5l1de premium bullsh!t sifter Join Date: Dec 2007 Location: 626DRIFT, ca Posts: 1,053 Trader Rating: (23) Rides Gallery: let5l1de	Typically, for every 75-100 hp you add, you should go one step colder on the spark plug's heat range. Also, a poor tune that leads to higher cylinder temps may require a colder range plug (improper fix but often performed). Many other factors such as, engine speed, load, Air/fuel mixer, fuel type/quality, timing, compression ratio, turbo size and even air temperature and pressure must be examined when considering a colder or hotter (rare to go hotter) spark plug heat range. So when you ask "LMK which is better..." you need to consider these factors listed above and come up with a solution that best fits your application. Remember, changing the heat range of a plug should not be based on "LMK which is better...". It should be based on the spark plug firing end temperature. End temps must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. This is called “Thermal Performance”, and is determined by the heat range selected. IMO you will be fine with a heat range of 6 or 7 on an engine near factory power ratings, tuned to factory settings and do not see higher RPM's for long periods of time. If you run your engine very hard often, consider 7. Selecting spark plug conductive material is a personal choice as (Norm expressed). Selecting the heat range for optimum "Thermal Performance" is not a personal choice, its a requirement based on your engines needs... ~m __________________ Don't Know How To Install? IM/PM Read My Sales Review 626 Friday Nights San Gabriel

11-05-2009, 06:15 PM	#12
traxx07 Zilvia Junkie Join Date: Dec 2008 Location: san antonio Age: 21 Posts: 579 Trader Rating: (6)	Ummmm ok .... S13 Redtop Stock t25 Greddy RSPL FMIC Kit Walbro 255 AEM Tru Boost (10psi-12psi) Like I said Enjuku says to run the 6 with stock turbo up to 12psi and a lot of people have been saying to run the 7 with anything higher then the stock boost level on the t25. Hence why I'm asking which is better... Ill go with the 7 just to be safe thanks for yalls help and I did use the search button and thats where I found different opinions. Next time read.

11-05-2009, 08:56 PM	#14
fliprayzin240sx SLINKY + ESCULATOR = Fun Times Join Date: Aug 2002 Location: Ass Crack of Japan Posts: 8,414 Trader Rating: (5) Rides Gallery: fliprayzin240sx	BCPR7ES...gap them down to .030-.028 and only cost $1.25 a pop. __________________

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