spark plugs
#1
Senior Member
Thread Starter
spark plugs
Ok I just done with mods, roush intake, magnaflow exhaust, cv fab intercooler, afe cold and hot pipes, 170 thermostat and can tune, I want to change my spark plug with NGK which one should I get and what gap.
#3
#6
Senior Member
****, we're talking anywhere from 30 to 50% more power. I used to tune hondas and going from 200 whp to 300 whp required a heat range 8 from stock 7. going turbo and running 400+ required 2 steps colder to a 9.
You don't "need" a colder plug but one step colder on a hotter tune is definitely a good idea for a 30-50% increase in power.
Consider that the 2.7 runs the colder plug stock and the 3.5 doesn't. That's because of the airload the 2.7 sees, which once you tune a 3.5 they will be similar.
I just wouldn't even bother with the risk of preignition for 35 dollars in plugs...
You don't "need" a colder plug but one step colder on a hotter tune is definitely a good idea for a 30-50% increase in power.
Consider that the 2.7 runs the colder plug stock and the 3.5 doesn't. That's because of the airload the 2.7 sees, which once you tune a 3.5 they will be similar.
I just wouldn't even bother with the risk of preignition for 35 dollars in plugs...
#7
Senior Member
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#8
#9
Senior Member
NGK 6150 Iridium IX, an equivalent to SP542. I use these in my BCB tuned 2.7 gaped at .026. 10000+ miles since changing and runs great, did get a noticed idle improvement (smoother), over the OEM 542's. KM