Hello there

Wondering what you guys with custom tunes and Meth Injection are running for

Spark plugs?

Heat Range?

Where did you get them?

Thanks

 

i run BRK7EIX, ngk one step colder irridiums stock gap. run awesome

 

I kept one step colder NGK 3787's gapped at .031 even on 47% E & 50% Meth, color was good, if a bit on the light (hot) side but if I wasn't flogging it, I was still doing 70 on the expressway 95% of the time.

Rock Auto, NGK Direct, even Amazon carries them at times.

BTW...you ever get a logging config? I PM'd you but you never responded.

 

I'm using 2 step colder plugs with meth
felt a little smoother after installing them.

 

ngk non copper... bkr7eix will be good for you..its the 1 step colder plug

 

Technically, you should be running stock plugs since the WI will reduce the combustion temps. If you run the colder plugs, you may never have them up to the right temp. The fact that they would normally foul is probably a bit hidden by the cleaning effect of the WI.

 

Stock plugs.. Just stick with them, there is nothing to gain except headaches switching from them. We've even run them on bigger turbo cars without issue. I really would stay with them personally!

 

Amen.

 

I vaporized a stock Delco #2 plug with lots of timing (26*) on 60% ethanol with around 5k miles on the plugs, after that I was leery. Prob too much boost + timing in the midrange though.

To each their own.

 

Ive been running the two step colder NGks cant remember the number on them but have run up to 26* for a couple months. i didnt really notice any more power or difference so i backed it back down but i had no problems with that high of timing.

 

I'm running NGK Iridiums 1-Step Colder gapped at .030

 

I did get it thanks man

Ill check out my stockers make sure they are good

 

I thought about doing water/meth with AEM Water/Meth Kit. Is it worth having on the LNF's? What kind of gains will I see?

 

Def allows you to run some more timing. It will put you somewhere between Pump Gas numbers and E85 numbers. Not as potent as the E but still effective and will make power!

 

E + Meth for more air charge & cyl cooling. No performance gain to speak of and really didn't affect the fuel trims much running 5 gpm of 50% Meth with 47% E.

 

what do u guys gap the ngk iridiums plugs at because i ordered mine and they came gapped .042

 

Spec is .030-.035- I like .031 You probably got the NGK LTR6IX-11 one step colder plugs kinda a pain to gap down. The 3787's I think are gapped close to .031 outta the box I think if I remember right.

 

I wouldnt even try to regap those. If you do, keep the contacts lined up and be careful not to chip the iridium Most people run between .035(stock) and .032(ngk 3787)

 

Where do u guys get these 3787s from? I've looked around the city here and most guys at parts stores give me a look like im from another planet. I did manage to find some autolite xp iridiums last year, but I think they were factory heat range. Currently runnin Delco 41-108's which I'm about to regap to see if my problem goes away. I think 1 step colder might help me honestly, since it only seems to knock once up to operating temperatures.

 

NGK 3787's are from Rock Auto, NGK online or even Amazon.com. Ran them the most of my tuned 60k miles. Some like them, some don't.

NGK 5476 are the same stock heat range plug, but I think better quality than the Delco's, even though the Delco's have a 5476 stamped on the boss.

 

The delco plugs are made by NGK!!!!

 

Lol.. I just found a guy who can get 3787's but they cost $100++ >.< Probably cheaper to order em stateside but I'd hafta wait.. kinda wanna fix this problem now.
Thx

 

I thought I implied that, doesn't mean they are the same quality though.

Hey, whaduIknow.

 

my car sucks on anything other than stock. stick with them

 

Rock Auto $10.18 ea CN, but I don't know about shipping or duties.