im going to be replacing my plugs sometime this week...i just wanna make sure these are the oem plugs for the N/A 300zx's, and if u guiys would recommend it, or get something better...i dont have much done to the car right now, just intake and soon hks exhuast...im a believer in stock plugs, unless i have something majorly done to the car...let me know guys, i did the best i could with a search before i asked

 

There are no better plugs for the Nissan 300ZX

 

even for a N/A application?

 

stock car, stock plugs, 2nd.

 

This is taken from Ash Powers' write-up in the 6 P's (Proper Preparation Prevents **** Poor Performance):
To mitigate the posibility of 'spark knock', you should use a spark plug that has a higher ability to dissipate heat. This simply means you need a plug with a higher 'thermal dissipation' number. Here's the breakdown:

NA stock: PFR6B-11 ; upgrade to the PFR7B-11
TT stock: PFR5B-11B ; upgrade to the PFR6B-11B

To view the rest of the 6 P's, go to:
http://twinturbo.net/net/viewmsg.asp...&msg_id=922678

 

3rd...........

 

ok, so lets get this straight, which are the best NGK plugs to go for on a 93 N/A z? and why? like standard or colder plugs?

 

I won't argue for or against the colder plugs. I have to see some facts on the benefits. I will argue for the stock plugs based on the fact that the motor was designed by Nissan for use with the PFR6B-11's.

 

sounds good then, ill be getting the NGK PFR6B-11

 

k i just ordered my plugs, will get them Friday....just wondering what is the correct gap?

 

Hey i saw the thing about the upgraded NA plugs? opinions on that? what ups do you need to run those?

 

If you are running a stock Z then a stock plug will work just fine. If you plan on modifying your Z then I say go with the colder plug. I went with a colder plug on my TT and had a noticeable difference. Then again, I was a Stage III TT running on NA plugs. In Japan the TT came with NA plugs stock. Just goes to show how stock doesn't always mean best.

 

k, well i got the NGK PFR6B-11, can someone tell me the gap for the plugs?

 

My car isnt stock. Im running stillen ported headers, intake, exhaust, ud pullies, will be getting ECU from Ash soon as well. Would this put me in the upgraded plug category?

 

Search for it, i know that info is around somewhere

Google for something like (Your cars year) 300zx spark plug gap

 

you shouldnt have to change the width

n/as usually dont really need a colder plug, but imo youre probably getting close to needing some

 

the plugs come pre-gapped

 

I don't know too much about upgrades on an NA. I do know it couldn't hurt to get the colder plug.

 

I looked around and couldn't find anywhere that the plug gap was specified. I don't remember what it was, cuz I always ask the guy when I buy them and I'll write it on one of the boxes. Anyways, when I did my plugs on the Z, I had to adjust two of them so they aren't always correctly pre-gapped. I did have to open the gap up.

If all else fails, just make sure that all six plugs are the same gap, whatever they are.

 

hmm, i never had a problem with the gaps, they were always the same

i need to get some colder plugs tho, i just detonated a bit yesterday

 

I cant find any PFR7B-11 plugs anywhere, can someone link me?

 

I believe for an NA it's .044"

 

yes it is, i found it out, thanks again guys

 

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