Spark Plugs

si_devil · 15th May 2008, 01:21 PM

Hi guys, just a quick one, thought it was a about time i put some decent spark plugs in the old girl.

Looking for the best/right ones for b18c setup.

Thanks team...

d16a7 · 15th May 2008, 02:54 PM

BKR7e-11's i believe from memory

b18c1 · 15th May 2008, 06:04 PM

what if your running a b16a head with a b18c bottom end? same plug again?

monsterbishi · 15th May 2008, 06:24 PM

just get basic ones, they are fine. ive done testing on the dyno with HKS, platnium, iridium and all the rest of the BS. $4.50 ones from repco are just as good as $120 HKS ones.
you could run a stage hotter if you like to get a better burn, but be aware you might run a hotter engine temp

bmgjet · 15th May 2008, 09:48 PM

Yup just get the cheap ones and make sure to gap them correctly and they work as good as any of the other ones.

Sleepy · 16th May 2008, 01:24 AM

Pretty sure copper has a stronger spark but doesn't last as long as irids/ plats

tianporn · 16th May 2008, 08:53 AM

Iridiums and platinums just last longer. Doubt there is any difference in performance.

AccordB20A · 16th May 2008, 10:52 AM

dont need to gap spark plugs from repco/appco. thats what the 11 on the end is 1.1mm gap. allready set

hotter engine temp with hotter plugs? so if one thought his car was running rich and cooler than usual with no cooling system problems and decided to use a hotter plug.. the coolant would be hotter therefore telling the TW sensor to make the mixture leaner? and therefore fixing the problem.. or not

Coupe-R · 19th May 2008, 06:13 PM

choosing a hotter or colder plug, is really there gain max power and stop detonation.

If the plug is too hot for the cylinder pressure/temps it will start igniting the mixture before the spark fires. Thats why going to a colder plug sometimes can GAIN power. (no knock so no loss in power)

In a high comp N.A or turbo car, going COLDER usually nets better HP NOT hotter.
Of course if you are WAY to cold to start with then hotter could increase power.
If you have a wild setup then you really just need to read the plugs, but most find a 7 heat range in a track/thrashed N.A car is fine. Otherwise a 6 range for a stockish b16a/b18c
Some big N.A setup run 8's and have gained from this (timing tweaks i believe also)

15th May 2008, 01:21 PM	#1 (permalink)
si_devil Member 700rpm (Idle) Join Date: Aug 2007 Posts: 75 Location: Auckland	Spark Plugs Hi guys, just a quick one, thought it was a about time i put some decent spark plugs in the old girl. Looking for the best/right ones for b18c setup. Thanks team...

15th May 2008, 02:54 PM	#2 (permalink)
d16a7 Senior Member 7,000rpm (Peak Power) Join Date: Dec 2006 Posts: 3,640 Location: Auckland	Re: Spark Plugs BKR7e-11's i believe from memory __________________ PROJECT EJ - D Ninja

15th May 2008, 06:04 PM	#3 (permalink)
b18c1 Senior Member 3,000rpm (Grandma Drag) Join Date: Oct 2007 Posts: 458 Location: Auckland	Re: Spark Plugs what if your running a b16a head with a b18c bottom end? same plug again?

15th May 2008, 06:24 PM	#4 (permalink)
monsterbishi Senior Member 6,000rpm (Max Torque) Join Date: Mar 2003 Posts: 2,143 Location: North Shore City	Re: Spark Plugs just get basic ones, they are fine. ive done testing on the dyno with HKS, platnium, iridium and all the rest of the BS. $4.50 ones from repco are just as good as $120 HKS ones. you could run a stage hotter if you like to get a better burn, but be aware you might run a hotter engine temp __________________ Current - SNYP3R evo5 -- EX - TEC2NV-133.4 kws --EX - '00 Euro R CL1 -- Current - '93 VFR400 RN

15th May 2008, 09:48 PM	#5 (permalink)
bmgjet Senior Member 6,000rpm (Max Torque) Join Date: Jul 2007 Posts: 2,148 Location: New Plymouth	Re: Spark Plugs Yup just get the cheap ones and make sure to gap them correctly and they work as good as any of the other ones.

16th May 2008, 01:24 AM	#6 (permalink)
Sleepy Senior Member 4,000rpm (Taxi Drag) Join Date: May 2007 Posts: 732 Location: North Shore City	Re: Spark Plugs Pretty sure copper has a stronger spark but doesn't last as long as irids/ plats __________________ ~~In Flames, We Trust~~ Want ADSL2+?Talk to me

16th May 2008, 08:53 AM	#7 (permalink)
tianporn Senior Member 7,000rpm (Peak Power) Join Date: Sep 2003 Posts: 2,683 Location: Auckland	Re: Spark Plugs Iridiums and platinums just last longer. Doubt there is any difference in performance. __________________ NZH PhotoCrew.

16th May 2008, 10:52 AM	#8 (permalink)
AccordB20A Senior Member 4,000rpm (Taxi Drag) Join Date: Aug 2005 Posts: 648 Location: Stratford	Re: Spark Plugs dont need to gap spark plugs from repco/appco. thats what the 11 on the end is 1.1mm gap. allready set hotter engine temp with hotter plugs? so if one thought his car was running rich and cooler than usual with no cooling system problems and decided to use a hotter plug.. the coolant would be hotter therefore telling the TW sensor to make the mixture leaner? and therefore fixing the problem.. or not __________________ Fail

19th May 2008, 06:13 PM	#9 (permalink)
Coupe-R Senior Member 9,000rpm (S2000 Redline!) Join Date: Apr 2002 Posts: 6,965 Location: Tauranga	Re: Spark Plugs choosing a hotter or colder plug, is really there gain max power and stop detonation. If the plug is too hot for the cylinder pressure/temps it will start igniting the mixture before the spark fires. Thats why going to a colder plug sometimes can GAIN power. (no knock so no loss in power) In a high comp N.A or turbo car, going COLDER usually nets better HP NOT hotter. Of course if you are WAY to cold to start with then hotter could increase power. If you have a wild setup then you really just need to read the plugs, but most find a 7 heat range in a track/thrashed N.A car is fine. Otherwise a 6 range for a stockish b16a/b18c Some big N.A setup run 8's and have gained from this (timing tweaks i believe also)

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