has anyone tried different spark plugs and dynoed them to compare? i searched but didn't find anything.

 

Is this one of those "which sparkplug gives me best power" kinda question? Sparkplugs dont give you power.

 

well it dont give power like replacing the cams. but a shitty plug dont igninte the air/fuel as good as the best plug. that could make a difference in power

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flashmn &raquo;</TD></TR><TR><TD CLASS="quote">Is this one of those "which spark plug gives me best power" kinda question? Spark plugs don't give you power.</TD></TR></TABLE>
ummm, no...

but you wouldn't go out and buy a .89 spark plug and throw it in your car would you? All the manufactures have some kinda sales gimmick and I look at them and wonder IF one of them could actually make some kinda difference. weather it be a U-grove or silver electrode. I know the theory behind it, but when on a dyno does a cheep $1.00 autolite perform differently then a $20 spark plug?

 

If its within specs yeah, because the only duty for a sparkplug is to provide the spark to ignite the mixture, nothing else.
I'm running on el-cheapo NGK Copper plugs, certainly I wont get the miles out of these plugs as I would from platinums, as copper errodes faster, but then again, for the price of one platinum, I can get about 4 copper plugs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flashmn &raquo;</TD></TR><TR><TD CLASS="quote">If its within specs yeah, because the only duty for a sparkplug is to provide the spark to ignite the mixture, nothing else.
I'm running on el-cheapo NGK Copper plugs, certainly I wont get the miles out of these plugs as I would from platinums, as copper errodes faster, but then again, for the price of one platinum, I can get about 4 copper plugs.</TD></TR></TABLE>

very true, though if i had to guess, Id say the copper plugs would give a better spark. yeah it may not give you better combustion and if it did i doubt it would be any greater then 0.2hp but the fact of the mater is, copter has less resistance the platinum. Im curious about the physics behind the "Bosch +4" how are they getting by w/o gaping them?

 

yeh, i agree with most people, some are better then others, just quality and life of the plug. esp on high boost and nitrous motors, plugs foul out very fast. i havent really heard much about the bosch +4 but i guess thier like the ngk and denso irdiums, they dont have to be gapped either

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hks85 &raquo;</TD></TR><TR><TD CLASS="quote">
ummm, no... </TD></TR></TABLE>

Why do you think changing plugs provides more power? The same amount of air and fuel is burning. And I seriously doubt that a hotter spark can create a "more thorough burn." It's all a bunch of gimmicks to me. I'm currently using a set of $2 NGK sparkplugs on a motor that cost about $8,000. I'm not about to waste money on more expensive gimmicky sparkplugs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Im curious about the physics behind the "Bosch +4" how are they getting by w/o gaping them?</TD></TR></TABLE>
Because its made of an exotic metal or so they told us.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flashmn &raquo;</TD></TR><TR><TD CLASS="quote">Because its made of an exotic metal or so they told us.</TD></TR></TABLE>

I cant remember the name of the machine, but it measures "spark duration" which matters far more then having a good or bad plug. I know most of you know this already, too big gap = shorter spark duration which in turn causes miss fires, hesitation etc. I haven't really experimented with too small of a gap but are their down sides to it? whatever. I know when you change out something as simple as a coil, the "machine" calls for a larger gap. I wonder what it would say with the +4s?