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View Poll Results: What band of sparkplug do you use?
Accel 32 2.91%
Champion 129 11.75%
NGK 341 31.06%
Autolite 91 8.29%
Bosch 17 1.55%
Splitfire 13 1.18%
Denso 32 2.91%
HD 304 27.69%
HD Screamin Eagle (any kind) 139 12.66%
Voters: 1098. You may not vote on this poll

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  #341  
Old 23rd October 2020
Iron Mike Iron Mike is offline
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Originally Posted by sportsterdoc View Post
Do you remember when H-D disapproved of synthetic oil, due to perceived "bearing skate"?
Heard that for years. “Too slick, bearings don’t roll”
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  #342  
Old 23rd October 2020
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Originally Posted by Iron Mike View Post
Heard that for years. “Too slick, bearings don’t roll”
If that were the case (too slick), then how could a bearing ball flat spot?!
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  #343  
Old 23rd October 2020
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I run NGK iridium, that being said my old dead ass cannot tell you you what brand of sparkplug might be in my engine.
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  #344  
Old 23rd October 2020
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glbsportster glbsportster is offline
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Interesting information to read from a Delphi Engineer...…

Regarding the OEM Champion plugs the resistive element that they use is not a resistor; it is a semiconductor suppression element. The effective resistance is specified to be 6k-15k. Furthermore, there is a fairly strong negative temperature coefficient, so the resistance decreases at normal operating temperature. In my experience, I have typically seen it in the range of about 2k-5k when the engine is running.

Note: Because the suppression element is not a resistor, it cannot be reliably measured with a conventional ohmmeter. The resistance of the element must be measured in an apparatus that provides 1000V pulses (per conversation with a Federal Mogul engineer).

You made it clear that this is all the information you wanted. However, if you want some insight into the ion sense system and related trouble codes, you may read on.

With regards to ion sensing, there is absolutely nothing magic about the Champion suppression element. Any trouble codes that you encounter have nothing to do with the resistance of the spark plug. Our circuit is designed so that we can tolerate a very wide range of resistances. We can easily operate with spark plug resistances from zero to 20k.

The ion current that we measure is in the range of 0-50 microamps. To avoid ion sense related trouble codes, you must have perfect continuity from the ignition coil to the spark plug tip. We have trouble codes P1353 and P1356 (front and rear cylinder, respectively) that are detected if we see no ion current under high speed/load conditions (where the ion current should be strongest). These codes will detect an open circuit in the ignition secondary circuit.

Additionally, we have trouble codes P1357 and P1358 (front and rear cylinder, respectively) that are detected if we see excessive noise on the ion signal. The intention of these codes is to detect an intermittent terminal.

Last edited by glbsportster; 23rd October 2020 at 06:59..
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  #345  
Old 23rd October 2020
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Originally Posted by sportsterpaul View Post
I run NGK iridium...
For the distances that you frequently ride, I would expect nothing less!
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  #346  
Old 23rd October 2020
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I now use Denso Iridium (IXU22) gapped at .035 and all is well. ..The following from Denso
Increased performance with the World's smallest Iridium Center Electrode (0.4mm). To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to increase, which has the opposite effect. Iridium Power uses DENSO's patented U-Groove ground electrode to achieve maximum ignitability while minimizing required voltage.


Last edited by glbsportster; 23rd October 2020 at 07:47..
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  #347  
Old 23rd October 2020
Iron Mike Iron Mike is offline
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Originally Posted by sportsterdoc View Post
If that were the case (too slick), then how could a bearing ball flat spot?!
Heard it for years, mainly from older mechs that worked in 50’s 60’s 70’s. More than likely the fear of change crowd.
If it did skate though, would it not basically act like a bushing with one single load contact area? Not able to support load on demand?
Not really a believer in this, just commenting on the comments.
This topic could probably drag on for days of useless dribble.
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  #348  
Old 23rd October 2020
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60Gunner 60Gunner is offline
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Quote:
Originally Posted by sportsterdoc View Post
Do you remember when H-D disapproved of synthetic oil, due to perceived "bearing skate"?
I dont run synthetic but not because of their perceived bearing skate.
They even have a reason to justify running the the crankcase breathers into the intake. Besides the EPA that is. And your motor won't run right breathing to atmosphere.
Sad thing is, people believe it. Same with the champion plugs.
But there's people here that believe stock is best when it comes to everything including the restrictive exhaust and 14.6:1 AFR.

Last edited by 60Gunner; 23rd October 2020 at 15:48..
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  #349  
Old 23rd October 2020
Tomcatt Tomcatt is offline
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Originally Posted by glbsportster View Post
Interesting information to read from a Delphi Engineer...…
You do realize that Sportsters have the Ion sensing software but don't use it having none of the software to retard spark if it "sees" detonation.

I've monitored knock indications on mine and what it shows makes no sense. Probably why there's no spark retard on Sportsters.
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  #350  
Old 24th October 2020
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sportsterdoc sportsterdoc is offline
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Quote:
Originally Posted by Iron Mike View Post
...This topic could probably drag on for days of useless dribble.
Well, in the absence of technical questions of the electrical or carburetor categories, it does provide some amusement...just not challenges to the gray cells.

The forum does seem to quiet down as it gets colder in the northern hemisphere.

Guess our Aussie friends just have it all too well sorted to keep up the technical questions!
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