Spark plug life shorter with a built/ported motor

[Ducman]

I was at the OR dunes this last weekend and my BR8eix plugs with about 40+ hours on them went bad. She started breaking up ever so slightly on top and just lost a little pep. I threw in a new set of BR8ES and it ran perfectly again. Its like you dont really notice that its lost its pep untell you put the new plugs in. I guess I spoke too soon when I said the BR8EIX would last forever. The plugs still looked perfect, no electrode or strap deteriation, nice medium brown on the porcelin and strap (not even remotely fouled), very little carbon buildup. I have noticed the same results with BR8ES and they seem to go a little faster. When the motor was stock ports, carbs, and ignition the plugs seamed to last forever, but I may have changed them more regularly and not noticed due to adding a little mod here and there and doing more plug checks. Could this be due to running leaded race fuel, or just running it at WOT freequently and for several seconds at a time due to agressive dune riding? Static compression is only 145psi but it has pretty tall exhaust ports (tripple exhaust port). Just curious if it is just common to wear out spark plugs a lot faster with built motors. I know way back when I had a Husky 510 it had these long skinny ass plugs and would go through spark plugs at about this rate. They too looked fine but would just be worn out and run crappy. Maybe its just the electrode has built up resistance from hight temps, heat cycles and a lot of juice passing through them? Is this typical?

[wayfst]

try b8es. without the resistor. i run b9es

[locogato11283]

ive never noticed it... i ran the same plugs for over a year in mine and only changed cuz i had some new ones layin around.

[rebelbanshee2]

same plugs for 2 years on a stroker no problems

[SANDSTAR]

My "shee sense" seems to always tell me that my plugs are going bad after 4-5 rides. I feel the slight loss of top-end (percieved loss) and quickly change 'em out.

 

I run just the plain ol' br9es, so they aren't that much to replace.

[Ducman]

My "shee sense" seems to always tell me that my plugs are going bad after 4-5 rides. I feel the slight loss of top-end (percieved loss) and quickly change 'em out.

 

I run just the plain ol' br9es, so they aren't that much to replace.

382207[/snapback]

 

When my shee sence stops tingeling as much then I know its time to change, but this last time it wasn't just a percieved loss. It was slight, but a noticeable difference.

I have ran the B8ES and haven't noticed any difference over the BR8ES.

[trex banshee]

the only difference between the b8es and br8es is a resistor wich has nothing to do with atv's unless you have a radio on it. If you run the b8es in anything with a radio it will mess up the radio station. I run b8egv in my banshee they are racing plugs they are about 5.00 a pop. some people get the "r" which really stands for resistor confused with race. But the b8egv plugs say "racing competition" right on the box.

[rebelbanshee2]

the only difference between the b8es and br8es is a resistor wich has nothing to do with atv's unless you have a radio on it. If you run the b8es in anything with a radio it will mess up the radio station. I run b8egv in my banshee they are racing plugs they are about 5.00 a pop. some people get the "r" which really stands for resistor confused with race. But the b8egv plugs say "racing competition" right on the box.

382542[/snapback]

 

you need resistor plugs with a dyna ignition, other than that you dont

[bradrs]

you need resistor plugs with a dyna ignition, other than that you dont

 

You really should run resistor plugs with any aftermarket digital ignition, most will have some sort of warning about this. The resistor won't really affect the spark, but it does affect the noise generated by the spark current. This can affect radios, but canl also cause problems with microprocessors in the ignition.