lastphaseofthis

iTrader: (8)

So they ARE better.

for those of us with practially new engines... who have had the same plugs for 3 years, these would be a good? i have my on opinion, i'm just interested in yours

sharingan 19

iTrader: (16)

"Better" is a highly subjective term.

If you are running a race engine that will be torn down every race, or every season, then perhaps there might be some appreciable benifit. As far as the street is concerned you will miss the dollars wasted on initial purchase of irridium plugs you will also miss the dollars wasted on premature replacements. You will not miss the +2-3 hp they give you for 4-5k miles.

RotaryEvolution

iTrader: (30)

yes they are beneficial but i haven't seen them last all that long in early model 13B engines, the renesis has much better sealing characteristics and higher voltage coils to keep the plugs clean.

dimitry04

i pretty much figured they wouldnt make much difference. a spark plug is a spark plug. i just wasnt sure. i thought that it would be pointless. i just thought id ask and see if there was any benefit to using them or not. i didnt know you were supposed to change the plugs that often. lol. learn something new everyday. piston engines are one thing. rotaries. man are they awesome but so picky it seems

lastphaseofthis

iTrader: (8)

oh, so now the voltage of the coils determines how hot the spark plug gets? or how well it stays clean?

i have an 8. in fact, most of you probably know what i have...

RotaryEvolution

iTrader: (30)

do what you want, let us know how long your plugs last and how much horsepower gains you get from the $80 additional on plugs.

the forum is about opinions, i gave mine. yes they offer small gains and even in the 8 they do NOT last near the 100k miles they are rated for, even with the much thinner, tighter tolerance, 5W-30 lubricated engine.

it is the equivalent of putting a hot cone filter onto a car and removing the stock cold air box.

many people have dynoed various plugs and the differences have always been very minimal, unless the NEED for colder plugs is necessary for a certain setup. if someone is installing them for more reliable starting for instance, then the engine is tired and will likely eat the plugs even quicker than standard copper plugs, if you're installing them for power and/or mileage, don't expect too much of them.