So preparing for a little maintenance for my MSRT8. Getting the Bosch long life filter for the oil change and then I got to the spark plugs. Which one should I go for? The NGK iridium or the Denso iridium? What's the actual difference between them - really?
I had Denso iridiums in my 5.7. When I changed them out, I was surprised to find that the electrodes were completely gone. After talking to my tuner guy, and knowing that I was spraying nitrous he advised that I stick with copper plugs. Copper has the fattest spark according to him. I would probably stick with what Chrysler put in your 6.1 from the factory. NGK or Champion. I'm not sure what advantage that iridium will have. BTW, I dynoed my car with old worn Champion plugs that came from the factory, then put in the iridiums, no difference.
Rockinsrt8's CocoBolo Pistol Grip Shifter, Gina's Orange R/T Leather Console Cover, BT pedal covers, FRI Sidewinder cam, Dynatec Headers , gutted cats , Borla125 Catback, Air Hammer,TDP - CMR tune, Pedders bushings, Police Pack Oil Cooler, SRT 8 Struts and Nivo's ,Hotchkis sway bars, 260,000 miles, 20" CSRT8 Forged Alcoas, 275/40/20 Ventus ST's , 1/8th mile 7.707 sec /90.19 mph -- 05 QC4X4 Ram 185,000 mi . Never Trust a Fart
I run the Champion iridiums, have about 63k on them, seem to be a good plug, Chrysler recommends to change the oem copper plugs every 30k.... I need to check them, I think I have one or two bad right now cause I have a slight miss....as for power gain Like Formerice said probably no difference..... champion has been a OEM chrysler plug forever so thats why i went with them
Hemi Registry #1348 SuperFrawgie 1361
Bull****. The OEM Iridiums are not scheduled for 30k mile maintenance, its 90k miles.
I think the NGK's will serve you well.
the only reason champion has been a factory plug for mopar is there cheap. and cheap they are. ive had two motors get destroyed by champions and have seen a few more. personally id recommend running NGK in everything from your lawn mower to the car. use your 16 factory champions as depth finders when you go fishing. denso iridium's are great for two strokes. iridium's help with burning the fuel cleaner and more efficient then a copper plug. in turn youll have smoother idle and better throttle response but really no power increase. there worth the money id like to think.
2006 Chrysler 300 SRT8 - SRT MAX+ cam by inertia, CAi by arrington, 3200 stall by Paramount, Doug thorley tri-y long tubes, diablo trinity, Billet tech catch can, z mount, thermostat housing, shifter bezel, 3G Customs BB fire wall cover, Speedlogix/REM 4 point rear shock tower brace, straight pipes with "chevy" tips, powder coated rims, gorilla black lugs. Vossen CV3's
Got cam? http://www.youtube.com/watch?v=hWDo_MhvJWA&feature=plcp
im running NGK iridiums. i had to regap them after about 25 - 30k miles of use, but no other issues.
2006 Bright Silver Magnum SRT-8
Air Hammer CAI - AirAid TB Spacer - Diablotoona Equiped
NGK Iridium Plugs - Magnaflow 3 inch pipes
BT Catch Can - LED signal lights
Pioneer Avic Z110BT Hacked and Bypassed
Factory HID Conversion - Flashtech LED Halos
i had a 2.4 swapped 1st gen neon with cams and yadda yadda yadda. put BRAND new champion copper plus in it and took it down the road after the swap was done. had 75 miles on it and one of the spark plugs HOLLOWED out. only thing was left was the threads in the head. the porcelain from the plug dropped into the cylinder and took out two valves and the other part of the plug shot up into my hood. i also raced "shifter karts" we had no good iridium NGK left but had an equivalent champion so we put it in. the electrode broke of and got wedged between the piston and one of the intake ports cracking the port and ruining a $300 cylinder. play it safe and run NGK. theres a reason why all the high horse germans run them american car company's are just cheap. i mean look at the lug nuts on our cars aswell..... corrosion under the "cap" on the lug nut and you cant get them off without pounding a socket on it.