Spark plug brand - Page 2 - Road Star Warrior Forum : Yamaha Star Warrior Forums

iowawarrior · 08-27-2012, 04:53 PM

at 15,000 miles i went with OEM'S. so, i'm assuming NGK's. it's been 9,000 miles now. i should pull them and have a look, but i'm sure they're fine.

LeaderDuece · 08-27-2012, 06:32 PM

Quote:

Originally Posted by sanny651

LD....you talking Champion brand?

I wanted to buy champions once for my ford truck. The guy at advance auto wouldn't sell them to me. Said they we're only for dodges

. I have what everyone else has in their bike though. Now- explain again why iridium may not be a good choice. You lost me there. I haven't switched yet but i was going to. I don't care about lasting 50000 miles either. I dont mind changing plugs...

Sent from my DROID RAZR

60ftgap · 08-27-2012, 06:50 PM

I run E3 plugs, swapped to them from original plugs at 16k and the butt dyno felt a difference then. I did see a Harley pick up 6 hp on a dyno with an E3 swap, but it was low numbers to begin with.

NJWarrior · 08-27-2012, 07:58 PM

I'm using NGK Iridium, put them in when I went with Dyna coils.

arizonawarrior · 08-28-2012, 04:20 AM

+1 me too.

Quote:

Originally Posted by NJWarrior

I'm using NGK Iridium, put them in when I went with Dyna coils.

sanny651 · 08-28-2012, 08:01 AM

LD, from what I've read (even on Nology's site) Iridium doesn't produce as efficient of a spark and that it's designed for longevity, not performance. Iridium is not as good of a conductor as other metals such as copper or silver. Silver and Copper plugs don't last as long as iridium ones, but they have a more efficient and better spark.

I mentioned earlier about my ATV Air/Fuel mixture ratio that was gauged by a Koso brand meter. Simply by changing from an NGK standard plug to an NGK iridium plug, it burned richer, which indicates a more incomplete/inefficient burn. That wasn't a butt dyno or me trying to look for information to back my stance. This was a purely unbiased effort to find out if there was any factual evidence that would indicate a change in performance based on a plug change, and the answer was determined to be that performance decreased. BUT, is it that much of a difference? That will be a point of debate that cannot be won by anyone because performance is defined differently by many people. 1/10 of a second isn't even a thought to some people, and to others it's the difference between moving on or going home at the races. So the next question is whether the loss of performance is worth the gains you get in not having to change out the plug as frequently. There too, I think it's a personal opinion/decision to which there is no right/wrong answer. Some would take a cat's whisker less performance if it means they wouldn't have to change plugs every year or two. Others would take higher performance even if it meant a complete motor rebuild every year. Just depends on the rider I think.

I guess I would liken it to tires. You can get tires that have a 60,000 warranty and they are built for endurance, not performance. They last a long time, but don't corner nearly as well as the performance tires. The tires you buy for a Ferrari don't have a warranty as they aren't built/designed to last long, but they stick to the road like glue and provide superior performance.

SkavenDC · 08-28-2012, 08:39 AM

I went with iridium, or should I say am going with iridium. I have the dynas on order along with a new coil mount. Today I will be ordering wires and a hunk of angle metal (if I can't get locally) for the custom mount. Only difference is that I too went with Denso.

07midnight57 · 08-28-2012, 09:02 AM

Quote:

Originally Posted by SkavenDC

I went with iridium, or should I say am going with iridium. I have the dynas on order along with a new coil mount. Today I will be ordering wires and a hunk of angle metal (if I can't get locally) for the custom mount. Only difference is that I too went with Denso.

Make sure you gap them properly. Stock gap does not work well with the Dyna's.

sanny651 · 08-28-2012, 10:06 AM

Check the gap stuff...I was told by a few people that you do not gap iridium plugs at risk of damaging the fragile tip of it. Not saying it's gospel, but that advice came from people more "in the know" than me.

sanny651 · 08-28-2012, 10:06 AM

Do you gap iridium spark plugs? - Yahoo! Answers

By the way, this wasn't my source I was referencing above.

But it validates a bit what I was told.

08-27-2012, 07:58 PM	#14 (permalink)
NJWarrior Senior Member Join Date: Dec 2007 Location: Stillwater, NJ Posts: 1,207	I'm using NGK Iridium, put them in when I went with Dyna coils. __________________ "Don't tread on me"

08-28-2012, 08:01 AM	#16 (permalink)
sanny651 Senior Member Join Date: Aug 2011 Location: Minnesota Posts: 1,040	LD, from what I've read (even on Nology's site) Iridium doesn't produce as efficient of a spark and that it's designed for longevity, not performance. Iridium is not as good of a conductor as other metals such as copper or silver. Silver and Copper plugs don't last as long as iridium ones, but they have a more efficient and better spark. I mentioned earlier about my ATV Air/Fuel mixture ratio that was gauged by a Koso brand meter. Simply by changing from an NGK standard plug to an NGK iridium plug, it burned richer, which indicates a more incomplete/inefficient burn. That wasn't a butt dyno or me trying to look for information to back my stance. This was a purely unbiased effort to find out if there was any factual evidence that would indicate a change in performance based on a plug change, and the answer was determined to be that performance decreased. BUT, is it that much of a difference? That will be a point of debate that cannot be won by anyone because performance is defined differently by many people. 1/10 of a second isn't even a thought to some people, and to others it's the difference between moving on or going home at the races. So the next question is whether the loss of performance is worth the gains you get in not having to change out the plug as frequently. There too, I think it's a personal opinion/decision to which there is no right/wrong answer. Some would take a cat's whisker less performance if it means they wouldn't have to change plugs every year or two. Others would take higher performance even if it meant a complete motor rebuild every year. Just depends on the rider I think. I guess I would liken it to tires. You can get tires that have a 60,000 warranty and they are built for endurance, not performance. They last a long time, but don't corner nearly as well as the performance tires. The tires you buy for a Ferrari don't have a warranty as they aren't built/designed to last long, but they stick to the road like glue and provide superior performance. __________________

08-28-2012, 10:06 AM	#19 (permalink)
sanny651 Senior Member Join Date: Aug 2011 Location: Minnesota Posts: 1,040	Check the gap stuff...I was told by a few people that you do not gap iridium plugs at risk of damaging the fragile tip of it. Not saying it's gospel, but that advice came from people more "in the know" than me. __________________

08-28-2012, 10:06 AM	#20 (permalink)
sanny651 Senior Member Join Date: Aug 2011 Location: Minnesota Posts: 1,040	Do you gap iridium spark plugs? - Yahoo! Answers By the way, this wasn't my source I was referencing above. But it validates a bit what I was told. __________________

08-27-2012, 04:53 PM	#11 (permalink)
iowawarrior Senior Member Join Date: Sep 2006 Location: sioux city,ia Posts: 1,768	at 15,000 miles i went with OEM'S. so, i'm assuming NGK's. it's been 9,000 miles now. i should pull them and have a look, but i'm sure they're fine.

08-27-2012, 06:50 PM	#13 (permalink)
60ftgap Senior Member Join Date: Jul 2010 Location: Elberton Georgia Posts: 1,744	I run E3 plugs, swapped to them from original plugs at 16k and the butt dyno felt a difference then. I did see a Harley pick up 6 hp on a dyno with an E3 swap, but it was low numbers to begin with.

08-28-2012, 08:39 AM	#17 (permalink)
SkavenDC Senior Member Join Date: Mar 2005 Location: Maryland Posts: 305	I went with iridium, or should I say am going with iridium. I have the dynas on order along with a new coil mount. Today I will be ordering wires and a hunk of angle metal (if I can't get locally) for the custom mount. Only difference is that I too went with Denso.

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