an0malous

^^ bullshit.
gap your plugs for YOUR car.
a rule of thumb is, you want the largest gap you can possibly run, without misfires or sputtering, or any blowout.
ONLY go smaller if you have to.
I recently spent an entire day checking gaps and test driving,
knock was evident at 0.32, and got worse if i went lower. (this is with 94 octane)
0.44 had some sputtering.
anywhere from 0.35 to 0.40 was basically the same performance,
0.38 ended up feeling like the best spot for my car.


dont listen to everyones ideas on what should work, find out what YOUR car likes.
go out and test it on your car. try 0.42 and see how it goes.
if it doesnt feel smooth, or you have any blowout or sputtering, go a bit smaller

killah_thug08

3.30" to 3.20" supercharger pulley - .045" gap

3.10" to 3.00" supercharger pulley - .045" gap

3 - 2.90" to 2.80" supercharger pulley - .040" gap

2.70" to 2.60" supercharger pulley - .035" gap

2.50" supercharger pulley - .035" gap

Bika

iTrader: (3)

my '06 owners manual recommends .042 for all our engines. *coughBULLSHITcough* after my stage 2 install i gapped my plugs according to these specs and it ran like ****. lots of hesitation. gapped them to .035 and it runs much smoother. i wish i had a way to monitor KR

Tkolb325 - the stock plugs are NGK PFR6T-10G. they are platinums. found here

Area47

stock plugs are not platinum.
iridiums.

huge difference in metallurgy here.

every car is different, you can not tune two cars the same way, you can not gap spark plugs the same

Dirty Sanchez

if the zex plugs are pre gapped, what size should i go with? i have stage 2, injen intake and gmpp sport exhaust

oldsskool

I believe we gapped mine @ .35..... couple days later with S2, GMPP cat back and JBP intake I put down 253hp on the dyno...

mrphoto103

I say .35, others may say .40....

btw, why are people paying $15 for plugs? They are like $1.77 each at Autozone

Bika

iTrader: (3)

follow the link in my previous post. its the NGK website with the exact part number of our stock plugs and it says they are double platinum. i will even copy and paste for the lazy people.

NGK --- Double Platinum --- 5542 --- PFR6T-10G ---.040" --- Supercharged --- $11.71

NoBalt123

Good advice from many of you.. Thanks for the continued input.

I think I will try again with .38 like you said an0malous. You seem like you know whats up in every other post of yours I have read. But I will keep in mind every car is different, so I will probably spend the day testing and seeing what works best.

Thanks again guys, and keep the input coming. I think this may be an ongoing situation for me..

Area47

platinums in a forced inducted car.
ack!!
glad i pulled em

Mikey851

Listen to Anomalous, he's right. Try to start out with the recommended gap of around .40" and work your way down if need be. With stage II alone do not gap down to .35 immediately that's not necessary.

Area47

ehhhh, depending on some other factors, but in a nut shell yes.

Mikey851

I know that one could write a book about it .

Area47

lol yepo!

my 7e's are gapped to .036-.037 i think. no problems, 26 degrees of timing, zero knock

distillion

coudlnt of said it better myself.
gappin my plugs at.035 like everyone does with a 2.7 is useless, near the top of the rpms i got some sparkblow out, upped the spark dewll in hpt, which helped alot, but didnt want to up the dwell too much due to premature coil pack failure.
tested it again and every so often blowout would occur but it wasnt everytime like it was previously, regapped to .032, still havnt had a chance to hammer it but im sure it did the trick cuz it was almost all gone the first time around.

this means nothing to me LOL

liolixli

I was getting hesitation with .039 an autolites. Also a lot of random knock. I moved to NGK IX and gap to .035. knock on initial throttle only, much less hesitation. I'm going to play with it more. Not sure if going down is the answer right now or going inbetween. I'll have to see what happens. the .039 also had a little excess carbon on them oil and gas was coming out the exhaust. No gap setting might fix the total issue there. Will update if I find one though.

an0malous

what octane are you runnin liol?
Gap can effect knock, but theres also a definate possibliity, that your going to knock due to other factors, regardless of your gap.

If your car feels better at 0.35, stay there.
in my experience going lower than that will increase your tendancy to knock.

liolixli

I'm running always 93 or better. Well the .035 cut out all my mid range knock. The car runs about 85% better with it. I was getting carbon out the exhaust, the lower gap completely cleared that up. I think the knock is now one of three factors, the heat, false sensor reading, the gap is a hair too small.

I'm going to test out maybe inching it up some, but .035 has so far performed worlds better than .039 under very close observation.

an0malous

i see "intense suspension package"
what have you got done there?
I know if i tighten down my Ingalls I get a tiny bit of phantom knock.....
so you gotta watch anything that stiffens up your motor, that can definately cause it.

galeblanc

What is the part number for these ZEX plugs?

http://www.compperformancegroupstore...ode=SPARKPLUGS

ALso, who prefers the ZEX plugs over the NGK bkr7e plugs? Also, how often should we be changing the plugs on a SS/SC 06 stage 2?

Thanks

sscobaltscZ06

Its kind of like the redneck backwoods hillbillies gap in their front teeth. Each hillbilly thinks his gap is better than the other guys...

lnf08ecotec

The BKR7E is a copper plug thats why he had better performance from the ZEX, the BKR7Eix are the iridium ix plugs that are 1 step colder and if you go by what cobalt-addiction.com lists....you should run them at .40 gap........