iridium Spark Plugs

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stagewex
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Re: iridium Spark Plugs

Post by stagewex » Sun Dec 08, 2019 10:47 am

windmill wrote:
Sun Dec 08, 2019 9:59 am
Lofty wrote:
Sat Dec 07, 2019 4:10 pm
Tomcatfixer wrote:
Sat Dec 07, 2019 9:57 am
Some spark plug tools have a notched tool to safely adjust the gap without contacting the tip.
Pardon my ignorance, but I wasn't aware that there was any other way to adjust the gap without contacting the tip. Well, I guess, except for needle-nose pliers. What other gap adjusting means do people use?
Perhaps windmill (and you, TCF :wink: ) meant to draw a distinction between the center electrode and the side electrode? The former is the delicate part on an iridium spark plug that shouldn't be touched. The latter is what we manipulate to adjust (set) the gap.
Yes, "tip" = center electrode.

The notch of a plug gaping tool hooks on the side electrode, allowing one to bend it to adjust clearance, without contacting the tip/center electrode.
IMG_3213.JPG

OK, so these super spark-plugs have become the new dreaded Oil Thread, Ha.
I'm still using the same model plug that came with the rig in 2007. Same 20-50 Castrol in the engine & trans, same FD fluid too.
None of the fancy red or blue stuff. Yeah... I like Dinosaurs.
Still runs great for some reason so I must be doing something wrong :)

However that is a cool little spark-plug gap tool, I'll have to get one. I've seen them but never realized how they work.
Thanks for posting Barry.

I gap (if they don't come pre-gapped) by forcing the gauge between the tip and the ground. Caveman style.

Clearly for what you guys pay for that Stormy Daniels Porn-Star spark-plug ya don't want to be doing that at all.
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Re: iridium Spark Plugs

Post by windmill » Sun Dec 08, 2019 10:55 am

Tomcatfixer wrote:
Sun Dec 08, 2019 10:12 am
Alright, I understand now. Your phraseology gave me the impression that folks somehow adjust the gap by means other than bending the ground electrode.
At one time there was.

Some early spark plugs had non adjustable electrodes, so some used external adjustable gaping devices to optimize spark intensity.
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This was from back when each cylinder had its own coil with adjustable points.
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Re: iridium Spark Plugs

Post by RC20 » Sun Dec 08, 2019 5:49 pm

Talk about way back machine, cool.
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Geno89074
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Re: iridium Spark Plugs

Post by Geno89074 » Mon Dec 09, 2019 12:13 am

windmill wrote:
Sat Dec 07, 2019 4:23 am
Geno89074 wrote:
Sat Dec 07, 2019 1:41 am
I put in the iridiums with them gapped out of the box, did not use the ural spec for plug gaps (since i did not want to damage the iridium tips) when I did the valve adjustment.
Rig is running great since the off-road map was installed, throttle bodies balanced and new fuel pump installed.
Am also running the iridiums in 3 carbed bikes and 2 fuel injected triumphs. So far so good.
Some spark plug tools have a notched tool to safely adjust the gap without contacting the tip.

https://www.amazon.com/Stanley-Proto-J0 ... B002BXJ7F8

Image
Thank you Sir that is great info
I am also concerned a little about putting a feeler gauge in between the ground strap and iridium electrode damaging the electrode coating is there a work around for this to get the ural spec gap on the iridium plug
Have thought about bending only the ground strap and using an undersized gauge then estimating...
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Re: iridium Spark Plugs

Post by windmill » Mon Dec 09, 2019 12:51 am

Geno89074 wrote:
Mon Dec 09, 2019 12:13 am
windmill wrote:
Sat Dec 07, 2019 4:23 am
Geno89074 wrote:
Sat Dec 07, 2019 1:41 am
I put in the iridiums with them gapped out of the box, did not use the ural spec for plug gaps (since i did not want to damage the iridium tips) when I did the valve adjustment.
Rig is running great since the off-road map was installed, throttle bodies balanced and new fuel pump installed.
Am also running the iridiums in 3 carbed bikes and 2 fuel injected triumphs. So far so good.
Some spark plug tools have a notched tool to safely adjust the gap without contacting the tip.

https://www.amazon.com/Stanley-Proto-J0 ... B002BXJ7F8

Image
Thank you Sir that is great info
I am also concerned a little about putting a feeler gauge in between the ground strap and iridium electrode damaging the electrode coating is there a work around for this to get the ural spec gap on the iridium plug
Have thought about bending only the ground strap and using an undersized gauge then estimating...
The center electrode tip isn't that fragile, and the gap doesn't need to be perfect. When the desired size gauge passes without obvious slop, then it's good enough.
Barry

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Re: iridium Spark Plugs

Post by Geno89074 » Mon Dec 09, 2019 1:30 am

copy that-Many Thanks
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Re: iridium Spark Plugs

Post by Msblu79 » Mon Dec 09, 2019 8:02 am

windmill wrote:
Sun Dec 08, 2019 9:37 am
Msblu79 wrote:
Sat Dec 07, 2019 9:56 am
Just an FYI for all, I recall reading somewhere that if you are running a Power Arc ignition it is NOT recommended to use those type plugs. Not sure why so I have been using the standard plug with no issues so far. Has anyone run them with the PA? :)
Power arc calls for 5k Ohm resistor plugs, and the NGK BPR7HIX meets that requirement.

http://www.powerarc.com/sparkplug.html
" "R" or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking."

https://www.ngk.com/product.aspx?zpid=9496
Thread Size: 14mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Resistor Value: 5K Ohm
Reach: 12.7mm (1/2")
Hex Size: 13/16" (21mm)
Terminal Type: Removable Nut
Overall Height: JIS
Gap: .031" (0.8mm)

My Patrol has a Power Arc ignition, and I've run BPR7HIX plugs.
Thanks for that info Windmill, I will try a set. :thumbsup:
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Re: iridium Spark Plugs

Post by RC20 » Tue Dec 10, 2019 1:21 am

The center electrode tip isn't that fragile, and the gap doesn't need to be perfect. When the desired size gauge passes without obvious slop, then it's good enough.
And I thought they had to be set like valve lash :D

I like the engines that list a range for valve lash, had to guess if ok if it was close. Cat as I recall was good about that. I knew you had a few thou one way or the other but never could prove it.

Funny one was one on check that came out brown goo (pounded metal) , set at something like .045, from the factory. Always checked em out new despite the 250 hours of before you need to. The Detroit Diesel engines for the fire pumps were spot on and you could tell someone at the fire pump assembler had gone through them and made sure or set them and had a lot of pride in exact.
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Formerly Owned: ( various rides on others)
Honda 90
2 x CB750K (one a true Japan Model flown to Hawaii by a P3 Orion Sub Patrol Aircraft!)
1 x CB700 SC ala Shaft Drive Nighthawk S (RC20 is the actual in house production Model)
1 x R80GS (ok to start with, learned to love it for what it was)
1 x CB450K

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Re: iridium Spark Plugs

Post by Mr Wazzock » Tue Dec 10, 2019 4:52 pm

I like the sales hype, that hasn't changed! Except now there are more stringent rules about what you write :D
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Re: iridium Spark Plugs

Post by windmill » Wed Dec 11, 2019 11:56 pm

There's individuals who lack the capacity to understand OE isn't necessarily the best, or that its possible to improve function with better quality components.

There's manufacturers that claim their product is better than anything else, whats realistically feasible, or in ways that can't be proven in a meaningful manner.

In reality the truth can be found somewhere between those extremes if one neither gullible, or obtuse.
Barry

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Re: iridium Spark Plugs

Post by atlasheating » Thu Dec 12, 2019 11:25 am

Windmill, thanks for being a real world tester. Do you have any need for a used (but still good) oddysey battery. I replaced the battery before I replaced the starter.

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Re: iridium Spark Plugs

Post by windmill » Thu Dec 12, 2019 11:47 am

atlasheating wrote:
Thu Dec 12, 2019 11:25 am
Windmill, thanks for being a real world tester. Do you have any need for a used (but still good) oddysey battery. I replaced the battery before I replaced the starter.
My battery is doing fine, but thanks.

There's a noticeable difference on my short commute. Its idle, and low rpm throttle response is smoother and more responsive when creeping along in traffic in the recent wet, cold weather, especially before its up to full temperature.

I won't say definitively that there isn't improvement elsewhere, but there may be some subtle differences for the better.
Barry

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Re: iridium Spark Plugs

Post by sKiZo » Thu Dec 12, 2019 1:25 pm

Post back in another 100k and let us know how the plugs are holding up, eh ... ;-}

Anybody ever try "split fire" plugs? Did those way back when on a Virago that had a lot of frapple brapple bang stuff on a hard decel and they fixed most of it. Once again, all about scavenging unburned fuel before it hits the exhaust ...
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Re: iridium Spark Plugs

Post by Lofty » Thu Dec 12, 2019 5:33 pm

sKiZo wrote:
Thu Dec 12, 2019 1:25 pm
Anybody ever try "split fire" plugs? Did those way back when on a Virago that had a lot of frapple brapple bang stuff on a hard decel and they fixed most of it.
Yes, on a Honda lawnmower. The Split Fire plug actually made the engine run a bit choppier, introducing some frapple where previously there wasn't any frapple. I exchanged the SF plug for the OEM-specified NGK and that was that.
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Re: iridium Spark Plugs

Post by windmill » Thu Dec 12, 2019 6:00 pm

Lofty wrote:
Thu Dec 12, 2019 5:33 pm
sKiZo wrote:
Thu Dec 12, 2019 1:25 pm
Anybody ever try "split fire" plugs? Did those way back when on a Virago that had a lot of frapple brapple bang stuff on a hard decel and they fixed most of it.
Yes, on a Honda lawnmower. The Split Fire plug actually made the engine run a bit choppier, introducing some frapple where previously there wasn't any frapple. I exchanged the SF plug for the OEM-specified NGK and that was that.
It was proven that they didn't do as advertised, and even the FTC went after them. Totally different from iridum and platinum plugs that have been proven effective, and are used in OEM applications.
Barry

"Take care, sir," cried Sancho. "Those over there are not giants but windmills".

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