Spark plugs

[highrollin113]

i use the bosch +4s and well i found they were a lot better than stock but i also went with msd 8.5mm wires

 

[dropmech]

It's all about stock replacement A/C Delcos. I tried the Bosch +4, the NGKs, and couldn't tell the difference in any of em so I save money and put stocks in there.

This. Why waste the money if you're stock?

 

[Grebbler]

Couldn't tell you an exact answer but this is what I remember of what I was told. It shortens the gap for the spark to jump making it ignite faster and more efficiently. IIRC GM changed the OEM stats (dont know to what) for gaping plugs and this .04 gap is a step more towards performance. Maybe someone can chime in and correct/expand on what I said. hope this helps!

I think it also had to do with rough idle complaints.

I am still on the Iridiums at 152K.

 

[HMFDZ28]

The NGK TR55's and TR6's are the most common;y used in the LSx community that I know of. I have TR55's in my Camaro, though stepping up to the TR6's for my heads/cam package. Truck will prob get a fresh set of TR55's them come time for a tune up.

 

[Conor]

There is no need to run anything other than OEM plugs unless you have forced induction. i.e. supercharger. It is a waist of money in my opionion.

 

[03tahoess]

which ngk series works best for our trucks?

 

[Redhoe01]

So I just bought Champion Iridium spark plugs for my hoe. Did I make a mistake or do you guys think they will be ok?

 

[98aggie]

NGK TR-55

NGK TR-6 for Nitrous

 

[LaOrange]

Hi All
Replaced the OE AC plugs at 100K with the Same Stock plug
The OE looked VERY good with 100K so why change if it is not broke
do not try to fix it

 

[TunasTwins]

Just threw some Autolites in today. Nothing special, just the $1 plugs.