mprowe350

I have my NGK spark plugs (that ATI recommends) and would like to gap them properly. I am running 8 pounds of boost and currnetly have them gapped around 38-40. What is the gap that some of you others are using? ATI told me 25-30 is that correct?
Thanks,
Mike

elektrik_juggernaut

.035 is what they recommend for high boost and off-road applications in the installation manual

mprowe350

Yeah I read that part in the instruction book, but after speaking with ATI they said to gap at 25-30. Are there any advantages/disadvantages?

etx

I run .03 on all my turbo cars with copper ngk's. .03 is good for a lot of boost. If the boost blows the spark out gap em' a little shorter.

What is the part number of the plug? Is it stock heat range or colder?

12SecZ

Mine are at 37 and seem to like it, some went 35 others went 39 so I went right in the middle and it idles real well.

mprowe350

30 sounds good since i'm about 39 right now and the dyno graphs show some minor spark blow out. I would like to see some more numbers from others if possible because pulling these plugs and changing the gap isn't my favorite thing to do. Hopefully i will get it correct this time.

mprowe350

sorry it is a colder plug(one range cooler)

350z_taquito

depends on how much boost you're running.

zcar03

iTrader: (7)

I will be running 9psi on my ATI with 1 step iridium NGKs...What should I gap at?

one3502nv

iTrader: (1)

We are gapping them around 32 with our forced induction cars...

phunk

iTrader: (21)

<--- 467rwhp stock original spark plugs at stock gap.

one3502nv

iTrader: (1)

I know you guys know what you are doing but I would at least check your plugs... when I pulled out my stock plugs, they were gapped anywhere from 40-52!!! Not good....