PERFORMANCE SPARK PLUG for 2009 CalVin

[janusz]

I wonder if those spark plugs are worth to be concidered and if not what you would recommend:
https://www.amazon.ca/PERFORMANCE-SPARK-California-Vintage-R9QT2431AR12ZSYU4R2431/dp/B00DAXOXPW
Thanks!

[Wayne Orwig]

Absolutely.

Also, did I mention that I have a bridge for sale?


 

[atavar]

I for one would be suspect of any plug that claims to improve spark voltage.  The plug has no control over that spec at all. 
I have had great luck with the Bosch Platinum+4 on my Norge.

[oldbike54]

 Dunno , the NGK's in the beater Jackal have about 40,000 miles on them , so the 25,000 mile claim seems silly .

 Dusty

[Triple Jim]

Actually, increasing a spark plug's gap, for example, will force the voltage to be higher before the arc occurs, so it's certainly possible for a plug to increase the voltage at the start of the spark.  That number is fairly meaningless, however, since the current determines how intense the spark is, not the voltage.

[fotoguzzi]

[Demar]

I would use a platinum or iridium plug before I sprung for what the performance plug costs. I have Denso Iridium plugs in my Stelvio and they work great.

[antmanbee]

NGK (7131) BPR6ES   -Outer   qty 2

Autolite 4303 Copper Resistor Spark Plug  -Inner   qty 2

NGK 8051 Spark Plug Cover  qty 4

All the plugs have the top that screws off so that I can use the NGK plug covers that clip securely to the screw top of the plug.

Plugs available at most autoparts stores for about $2 each and the NGK 8051 were $2 each at amazon.

Cut the old plug caps off carefully without shortening the wires and reuse the wires.  They are copper wire  and good quality.

[antmanbee]

This is the best deal on a spark plug socket for the inner plugs. It needs to be thin walled to fit in the hole. $3

https://www.amazon.com/gp/product/B0074HNKI6/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1

[janusz]

Thank you all. Based on antmanbee recommendation I ordered spark plugs and spark plug cover plus two of those https://www.summitracing.com/parts/SXT-884504. I wonder if you could explain why new spark plug covers are needed and a bit more details how to install them. Thanks!

[antmanbee]

New coves may not be needed. The covers on mine did not seem like high quality. I don't remember now but I think one came apart as I pulled it off the plug.
The NGKs are the best and not expensive.

To remove I just cut down the outer rubber of the plug end length ways being careful not to cut too deep and peeled off the cover and then unscrewed the plug end. The NGKs screw on too. The only part of installing the new ones that is a little difficult is to get the rubber boots on the wire and the get the plug end screwed on. A little lube of some type helps. I used dish detergent with a little water.

[janusz]

Thank you antmanbee, I should have them delivered by end of the month and then I will change the spark plus and at the same time I will be able to determine if new covers are needed. Thank you!

[Two Checks]

Actually, increasing a spark plug's gap, for example, will force the voltage to be higher before the arc occurs, so it's certainly possible for a plug to increase the voltage at the start of the spark.  That number is fairly meaningless, however, since the current determines how intense the spark is, not the voltage.

Yhe voltage cant get any higher than the ignition system can produce. A larger gap requires a higher voltage to jump that gap. If the voltage isnt high enough to jump the gap the plug doesnt fire.
And regarding multiple wire electrode plugs, the spark can only go to one electrode at a time. Electricity seeks the path of least resistnce.

[Triple Jim]

Yhe voltage cant get any higher than the ignition system can produce. A larger gap requires a higher voltage to jump that gap. If the voltage isnt high enough to jump the gap the plug doesnt fire.

Absolutely.  On the other hand, ignition systems normally aren't pushed to the highest voltage they can produce, so increasing the gap or otherwise making the plug harder to fire will raise the actual voltage present just before the plug fires, within the limit of the system.

I was testing various spark coils in a CDI application a couple years ago, and forgot to connect a coil output to the spark plug.  An arc jumped about an inch and a half from the wire to the top of the plug!

[atavar]

To some degree I concur, the plug has an effect on voltage. For example if the plug is a dead short the voltage will be effectively zero, and don't bother with any bunk about stray resistance allowing voltage build up. 
At the other extreme if the gap is too wide for the voltage to overcome the voltage will go to system maximum voltage with no spark and no ignition in the combustion chamber. 
while the spark plug while may be the limiting factor it still does not generate or increase any available voltage. Besides that it is the current that does the work and effects the ignition, not the voltage.  The voltage just facilitates delivery of the current.

[Waltr]

  Those plugs must be run with this exhaust to be most effective.

https://video.search.yahoo.com/search/video?fr=tightropetb&p=tail+gunner+exhaust+pipe+videos#id=2&vid=3627ab8a5132ec31cdbf1a217e6922a6&action=click

[Triple Jim]

Besides that it is the current that does the work and effects the ignition, not the voltage.  The voltage just facilitates delivery of the current.

Yes, I said that in reply #4 above.