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Spark Plugs

MANWHOR3

By MANWHOR3,
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MANWHOR3 Proficient

MANWHOR3

Posted
Posted

I have searched for previous threads, but have not found an answer to this quesiton. I know tha everyone has different views about copper/platinum/iridium. Personally, i believe in using coppers, and changing them frequenty.

My question is to do with the gapping. Stock gapping is 1.1mm. yet, when running stock boost, i tend to get misfire. Plugs have not been changed ever since i've got the car (probably 15000 ks). Should I get plugs gapped at 1.1mm? (car is running stock boost, just zorst and air filter). i've noticed that some of you guys run 0.8 or 0.7. is this only if you run more boost? like would it be beneficial to run 0.8 mm even at stock boost?

Is regapping plugs bad? i've got a feeler gauge and i was wondering if it is ok to just regap them and put them back in after a clean? or should I just buy new ones?

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MANWHORE Grand Master

MANWHORE

Posted
Posted

what is the heat rating of a spark plug?

I pulled my cover plugs out, haven't been changed for 20000 ks. They are all dirty and gapped at 1.4 mm.

I was thinking about just buying some new ngk plugs. How do i decide which heat rating to get, and what would be the difference between a 1.1m and a 0.8 m gap? stock boost, just zorst and airfilter

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Damo Community Regular

Damo

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Posted
my 33 would mis-fire when it had only an exhaust and pod and no boost. used 6 heat range coppers gapped to 0.8 and it solved all my problems. i think the 0.8 gapped ngk copper is bcpr6es (dont get bcpr6es-11 - 1.1gap).

-rb25

U can get the bcpr6es-11 which are already gapped to 1.1mm and simply tap them in a bit to whatever u desire with the use of feeler gauges.

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Damo Community Regular

Damo

Posted
Posted
what is the heat rating of a spark plug?  

I pulled my cover plugs out, haven't been changed for 20000 ks. They are all dirty and gapped at 1.4 mm.  

I was thinking about just buying some new ngk plugs. How do i decide which heat rating to get, and what would be the difference between a 1.1m and a 0.8 m gap? stock boost, just zorst and airfilter

are they gapped to 1.4 or worn to 1.4? i would be fixing that asap, u will notice a big difference. Nissan recommends heat range 5 but most people say to use 1 range higher for a certain hp increase from stock.

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shark33 Enthusiast

shark33

Posted
Posted

Hey ive had my 32 for about a month or so i dont think the spark plugs have been changed, im all new to this, after just reading all the posts it still doesnt make sense. Im runnig 10 psi on it exhaust, SAFC 2 cold air intake and dump pipe from turbo, and i think i should change the spark plugs for peace of mind does anyone know what sought i should get copper/irridium/?

What gapping should i have and stuff like that. It's for an R32 GTS-T.

Car approx has 86,500kms on the clock.

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rb25 Grand Master

rb25

Posted
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shark33: my theories are as follows:

a car with standard ecu runs rich and fouls plugs quickly. in this case, use copper plugs and change regularly. now a car with a tuned ecu or safc or the like will run leaner afr's so plugs dont foul as fast and you dont have to change them as often.

So If i was using a standard ecu id use coppers, any aftermarket ecu or piggyback, id be looking at platinums or iridiums. I have recently gone from coppers 6 heat to platinums 7 heat after putting a powerfc in.

-rb25

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mindflux Mentor

mindflux

Posted
Posted

I just changed my spark plugs..

I went from PFR5A-11..

and put a set of BCPR6ES in my stock r32 gtst (115 on the clock)

I cant rememebr what the gapping is of these, but it did not have the '11" on the box, which means that its either 1.1 or 0.9 i think the guy at repco explained.

Dont seem to be missing as far as im aware?

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