spark plugs??? [Archive] - Cherokee SRT8 Forum

: spark plugs???


sprsonic
06-20-2007, 05:08 PM
anyone with n2o on the srt8 gc change plugs for a colder or lower the gap?
going to norwalk(summit) raceway this friday morning for a track rental and
want to up the jets.

Inferno SRT8
06-20-2007, 05:09 PM
About the only thing I agree with the SRT8 engineers is this, changing plugs will have no signifigant gain in your SRT8.

But good luck and let us know if you feel a difference, I pulled mine at 7000 miles and they looked brand new.

sprsonic
06-20-2007, 05:12 PM
not looking for more power, just looking for a safer combustion chambercooler cylinder temps with a bigger nitrous shot.

navyavi469
06-20-2007, 05:24 PM
Remember the Split-Fire... LMAO... what were we thinking back then! :D :D

Inferno SRT8
06-20-2007, 05:38 PM
not looking for more power, just looking for a safer combustion chambercooler cylinder temps with a bigger nitrous shot.


With nitrous you will need new plugs, no doubt.

FastMatt
06-20-2007, 06:35 PM
I run the 5.7L copper NGK plugs in my SRT-8 on a 125 shot.

UDLOSE
06-20-2007, 06:37 PM
I put sone new mats in my jeep.Gave me about 30hp:D

gculver
06-20-2007, 06:52 PM
Check this out, several have used the #2315 NGK IX with success!--Search function is always helpful!!!!:D GC
http://www.cherokeesrt8.com/forums/showthread.php?t=3565&highlight=spark+plugs

sprsonic
06-20-2007, 07:21 PM
thanks everyone

runnin 9s
06-20-2007, 07:21 PM
You do not want to use platinum plugs they are not good with n2o. These motors at wot only see 17 to 20 degrees of timming, so you dont need a colder plug if you stay under a 100 shot just gap them to 36-38 thou. If you go over that say a 125 shot then you will want to pull the plugs and look for signs of over heating (ground strap starting to bend heat discoloring) then go one step colder, but I dont think it will be a problem. Also dont waste your money on iriduium plugs. copper plugs are cheap and very replaceable. I have the iridium plugs and the car has a hard time starting.

sprsonic
06-20-2007, 07:27 PM
i think i'll go with the 5.7 hemi plugs. i know they're copper and inexpensive. hey matt did you tighten the gap from .050?

FastMatt
06-20-2007, 07:29 PM
i think i'll go with the 5.7 hemi plugs. i know they're copper and inexpensive. hey matt did you tighten the gap from .050?


Ya I have them gapped at 0.038"

sprsonic
06-20-2007, 07:48 PM
is your 125 shot at the flywheel or the wheels, the nx jets i have are 125 to the wheels according to nx. i always thought the hp ratings were at the crank.

cobrakid
06-21-2007, 08:54 AM
I use NGK 6ix, and Jeep has run perfect. gapped at .038.

Going to up my shot from 75 to 125 in a few weeks.
....b/c nitrous makes it's own weather. haha

awdrocks
06-21-2007, 09:06 AM
I would go copper on a power adder. It's a stronger spark and less prone to spark blow out.