If anyone is wondering what the best plug is, here's my semi-professional opinion
I felt my car was lacking something(besides a new tune) so I pulled the plugs to see what was going on. No real carbon deposits or anything just a red hue to the porcelain housing the electrode. So out of boredom I decided to change them.
The shop that installed my headers about 4 months ago, installed NGK TR6IX Iridiums, if you do simple research you can find that copper is more conductive than platinum, iridium, etc. Copper will send the hottest spark(doesnt last as long but such easy install and you can buy 3 sets for the price of 1 iridium...who cares?)
So I went to AutoZone and blew 17.77 on a set of NGK V-power Copper Core. After about 30 minutes install, and a test drive, I'm very satisfied with the performance of the plugs.
Firstly, it started up louder and stronger than before.
Regular driving around the neighborhood just felt smoother and I heard less crackle out of my pipes, meaning less unburned fuel was being exhausted.
Under throttle I had much stronger pulls and could feel the car running more powerfully and smoothly. Roads were still damp and through 4th I was spinning tire at partial throttle
I definitely felt a gain in throttle response and in 'seat of pants' feel.
I'm sure once the computer starts adjusting the tables to the new hot spark I'll gain some efficiency back.
I still have the Iridiums but don't plan to reinstall, copper core is the way to go. Try copper plugs!!!
K&N CAI, lightly ported stock TB/INT, JBA Hpipe, Spintech Side Exh. ([email protected]
r/t .8800 60' 2.06)
1/13/10- Kooks 1 3/4, LS7 Clutch, B&M shifter
1/21/11 - Eibach Springs, Monroe Shocks, EBC Brakes
Soon - "Sungold" PowderCoated 17"s