Q: Gap Spark Plug - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

vbl · 09-06-2007, 10:25 PM

Hi everyone, this is my setup: GT2871R .64 Turbo, 780cc Injectors, Greddy Manifold, HKS Fuel RAil, Fuel Pressure REgulator. U guy know what gap i should gap for my NGK spark plug, thanks.

s13rookie · 09-06-2007, 10:38 PM

What motor?

Is your ignition system stock? Most people i think run a close to stock gap-maybe a bit smaller, but go with a diff heat range plug

vbl · 09-06-2007, 11:57 PM

motor: SR20DET Redtop

Dousan_PG · 09-07-2007, 12:04 AM

yeah run bkr7e at leat
gaping
i think .028 is what mine are at.

28
.028 or .28 whatever it is
i think its .028 - .030 is fine

GSXRJJordan · 09-07-2007, 02:14 AM

^^^ I love how Aaron posts up like he doesn't really know lol, like maybe he's never changed plugs. HAhaHA.

Anyhow, your gap should be determined by the heat range of your plugs and the boost pressure - more pressure = more risk of detonation = smaller gap, but that makes for a less powerful spark. Long story short, run 28 thousanths (.028").

azndoc · 09-07-2007, 02:19 AM

Haha

Just bought my gaping round coin tool thing yesterday.

Just happened to see it at Kragens and remembered I bought a set of SP from Justin.

Yeah the gap is 0.028 from what Justin told me when I bought them.

I hope he's right.

Dousan_PG · 09-07-2007, 09:35 AM

no i change my plugs every two events. not because i have to, but car runs so nice w/ new plugs and so smoooooth. its probably overkill and uncessssary but i do the same w/ the oil. doesnt hurt and cos is maybe 50 bucks for everything. no biggie.

i only have the one measuring guy because i threw the rest away. so it must be the .028
haha

vbl · 09-07-2007, 12:01 PM

so if i boost around 16-18PSI, then do i have to use the heat range spark plugs or i can gap different size instead .028.

OBEEWON · 09-08-2007, 11:54 PM

Is it O.K. to go any lower than .28? Ive heard some people suggest .23.

09-06-2007, 10:25 PM	#1
vbl BANNED Join Date: Dec 2005 Location: MN Posts: 104 Trader Rating: (1) Feedback Score: 1 reviews	Q: Gap Spark Plug Hi everyone, this is my setup: GT2871R .64 Turbo, 780cc Injectors, Greddy Manifold, HKS Fuel RAil, Fuel Pressure REgulator. U guy know what gap i should gap for my NGK spark plug, thanks.

09-06-2007, 10:38 PM	#2
s13rookie Zilvia FREAK! Join Date: Mar 2002 Location: connecticut Age: 43 Posts: 1,129 Trader Rating: (0) Feedback Score: 0 reviews	What motor? Is your ignition system stock? Most people i think run a close to stock gap-maybe a bit smaller, but go with a diff heat range plug __________________ Ive spent most of my money on cars and women...the rest i wasted

09-07-2007, 12:04 AM	#4
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 45 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	yeah run bkr7e at leat gaping i think .028 is what mine are at. 28 .028 or .28 whatever it is i think its .028 - .030 is fine __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

09-07-2007, 02:14 AM	#5
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	^^^ I love how Aaron posts up like he doesn't really know lol, like maybe he's never changed plugs. HAhaHA. Anyhow, your gap should be determined by the heat range of your plugs and the boost pressure - more pressure = more risk of detonation = smaller gap, but that makes for a less powerful spark. Long story short, run 28 thousanths (.028"). __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

09-07-2007, 09:35 AM	#7
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 45 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	no i change my plugs every two events. not because i have to, but car runs so nice w/ new plugs and so smoooooth. its probably overkill and uncessssary but i do the same w/ the oil. doesnt hurt and cos is maybe 50 bucks for everything. no biggie. i only have the one measuring guy because i threw the rest away. so it must be the .028 haha __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

09-06-2007, 11:57 PM	#3
vbl BANNED Join Date: Dec 2005 Location: MN Posts: 104 Trader Rating: (1) Feedback Score: 1 reviews	motor: SR20DET Redtop

09-07-2007, 02:19 AM	#6
azndoc Post Whore! Join Date: Feb 2006 Location: Los Angeles Age: 42 Posts: 9,487 Trader Rating: (47) Rides Gallery: azndoc Feedback Score: 47 reviews	Haha Just bought my gaping round coin tool thing yesterday. Just happened to see it at Kragens and remembered I bought a set of SP from Justin. Yeah the gap is 0.028 from what Justin told me when I bought them. I hope he's right.

09-07-2007, 12:01 PM	#8
vbl BANNED Join Date: Dec 2005 Location: MN Posts: 104 Trader Rating: (1) Feedback Score: 1 reviews	so if i boost around 16-18PSI, then do i have to use the heat range spark plugs or i can gap different size instead .028.

09-08-2007, 11:54 PM	#9
OBEEWON Post Whore! Join Date: Feb 2006 Location: Hightened State of Emergency Posts: 6,053 Trader Rating: (9) Feedback Score: 9 reviews	Is it O.K. to go any lower than .28? Ive heard some people suggest .23. __________________