:( long term update. I dislike the .30 oem plugs, too much knock.

[TopherSho]

I switched to the OEM plugs,  and left the gap at .30 instead of .28 and ran them for a few months since the thread where I showed them all fouled for being 1 step colder .. My data logs now show a consistent +3 knock on launches.  They may not foul but I am not entirely happy with them.  Seems to cap my spark by a point or two which bugs me...

(caveat: I am too much of a perfectionist.  I know the car can run 26-28 degrees so running 24-26 bugs me)

 

[SHOdded]

Have you checked the plugs since install?  No codes in the PCM I take it?  Checked the methanol setup, any kinks in the tubing/reason to suspect not spraying correctly?  Does it matter which gas station you use?

 

[TopherSho]

Have you checked the plugs since install?  No codes in the PCM I take it?  Checked the methanol setup, any kinks in the tubing/reason to suspect not spraying correctly?  Does it matter which gas station you use?

yeah, I pulled the front three since they were the worst last time and they look almost new.  Meth is good.  flowing 550-ish ml seems on track with a .2 drop in STFT,  where as before i was more -.15ish with the 375 nozzle .. i noted immediately after changing the plugs the spark loss, but have kept them in since it is a pita to change them for me. 

if they don't crap out imma leavin' them in.  i'm too old (tired/lazy) to be swapping plugs every 20k

 

[SHOdded]

Maybe you WOULD benefit from the 542s or regapping to 0.028.  Whatcha gots to lose?

 

[avidmotion]

542s at .028 has worked well for me.....