setup has a lil prob...

[KasperSlide]

hey my set up

sr20det red top
gt2871rs
hks wastgate
EX mani
greddy in mani
spitfire coilpack
greddy fmic
greddy rs bov
full ex
pfc with pfc boost cont kit(not tuned)

new sensors that were replaced
CAS
IACV
temp sen
maf (z32)
complete harness

i did search and found some good info on it so i think i know the fix. but would like some sug.

the problem.
as was the prob in other posts i have a stumble/shutter at WOT around 4-5krpms. when it happens and it doesnt happen every time it blow out a nasty rich black smoke
so im looking at getting new plugs i have the OE ngk's gaped at 30 fairly new
so im asuming i need a hotter plug an gap for the amount of boost (14psi) going in.
looking for any advice on what i should go with an possible a part # for the plugs

btw i have checked tps/vac leaks/boost leaks. though my ing timing never seemed right(one reason i bought a new CAS)

[Mr.GT30]

you need colder plug not hotter plug, I prefere heat range #7 plug, and try to gap @ 0.024 it should fix your problem

[blu808]

yea. well 28 gap usually works well on street. but try it out and see if it works. Sounds like you are blowing out the spark.

[KasperSlide]

thats what i was thinkn. the boost blown out the spark
i beleave the oe ngk's are 7's???