spark plug

[Mattpioneer]

was searchin and found some plugs for 6 bucks apiece. would these increase any power, or would i just dump cash for shi7 and look stupid

 

here's the page

http://store.summitracing.com/partdetai ... toview=sku

[HOrnbrod]

The latter. Stick to the old copper cores, they still work best.

[Eagle]

First choice - NGK (the ordinary ones, NOT the platinum tip)

 

Second choice - Champion truck plugs

[135Boom]

are the bosch platinum +4 not suppose to be good? I havent had any problems with them? They are the MOPAR upgrade? I think I picked them up at napa for like $6 a piece......

[BLHTAZ]

are the bosch platinum +4 not suppose to be good? I havent had any problems with them? They are the MOPAR upgrade? I think I picked them up at napa for like $6 a piece......

Yes...they are good. You are correct in the fact that they are the Mopar Performance upgrade plug as well. I run them in both of my 4.0L Jeeps as well as in my 2002 Ram 4.7L.

 

I have come across some 4.0L engines that don't like Platinums at all for some reason, but that has only been maybe two or three times in 20 years. ;)

[maddzz1]

Is it important to make sure platinum plugs are properly torqued? I had a set in a nissan once and they continually came loose.

[Mattpioneer]

so bottom line.........more spendy....more performance :USAflag:

[Pete M]

I bought the plain-Jane coppers for my trucks and they work great. :D

[BLHTAZ]

so bottom line.........more spendy....more performance :USAflag:

Not always more performance...but definitely longer life and sometimes a "little" better MPG.

[HOrnbrod]

Not always more performance...but definitely longer life and sometimes a "little" better MPG.

 

I get the best mileage and a better idle with the Champion copper cores. I think the heat range is the most important. The stocker 4.0s seem to run best w. the RC12s, but they were too hot for my stroker and I dropped down two heat ranges to RC10s and their color now is spot on.