I need to know what type of plugs people are running with their nitrous in the maxima, I have a 98, that I just put new platinum plugs in, when I called NOS they said that I need to get some regular NGK plugs one step colder, they said the platinum would flake off and cause the gap to get bigger, can anyone help?? Brent

 

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BKR6e-11 are the copper 1 step cooler plug

I think the plat's are pfr6g-11

Plats are fine, but coppers are cheeper.

 

NGK PFR6B-11

if you are buying them from a store and they don't know.. it should be the plugs for the 92 NA 300zx

 

bastard

i stole those from your old sig by the way

just ordered 12 last weekend (don't ask why)

 

Those are good choices.

Erik

 

The new part # should be PFR6G-11

Go with the copper plugs. No need to spend $8 on platinum.. plus, the copper plug will create a hotter spark than platinum. You just have to change them out a little more often (not a difficult job to do every 30k)

 

i use the regular copper ones that cost 99Cents at kragen. off 92 300Z .. hope this helps. By the way, what is the gap everyone is using? i pregapped my SP at 45..

 

I think most of us are running plats, and you don't gap those.

 

I run a .38 gap.

 

no one cares about you

 

Looks like you do

 

are you doing that AWD VQ project where you put the second engine in the back?

 

To prevent the spark from being blown out. I havent had a specific problem. This is just what I've read and been told.

 

if the vehicle is producing ~ 100+ more hp than stock, you should decrease the gap to make the spark more concentrated. Some cars can get by with the normal gap (1.1mm) and not have hesitation or backfire. Some cars will so the gap should be reduced. If that is the case, the ignition should be upgraded but the cheap fix is to regap them.

 

Yea, what he said

Dosent reducing the gap also effect the motors abaility to function at higher or lower rpms. Smaller gap is better for high rpms, and large is for lower rpms. I know their is some relation, but I dont know the science behind it.

 

BKR6EIX-11 Stock#3764 - 1 Step colder

 

Yea, what he said lol

For Maximas, though, the difference is probably negligible til you push more than 400 hp. Gap makes a noticeable difference in the 600+ hp Zs, Supras, RX7s, etc.

 

I spoke to a local Nissan SAE Mechanic (for what that's worth) who said the ignition system on the Maxima is so powerful, one does not need to decrease the gap.

 

I guess I'll re gap tomorrow. Perhaps I'll get a 13.5 then.

 

Nah your lying, thats a fake picture. LOL

My kitchen sink might get you a few HP, I'll sell it to ya for $50.

 

Up to a point but once you're using forced induction or nitrous on top of other bolt on mods, the DIS might not be able to handle it all. The DIS is efficient but it's not bullet proof.

 

Ok, $49.99 on my kitchen sink, thats my final offer!!!

 

I'm plumbing-in a 70-shot soon. I'm using platinum plugs, one temp range cooler than stock. Do you think I need to close the gap at that level of bolt-on power? (Can you quantify your "Up to a point..."?) Thanks for your feedback.

 

I'd definately close them down .002", maybe .003". If you don't have any hesitation or backfire, put them back to the original gap of .043", give or take .001"

 

Your problem is nitrous and fuel distribution. Its uneven. The #7 plugs will help, but it wont fix the real problem. You need to go to a profogger system, nozzle per intake runner.

 

the heat range/part # is mixed up when you look at American and Japanese spark plugs. I don't know much about Bosch so I can't comment.