Iridium plug fouling twin cam 88
#22
12-15-2018, 09:21 PM
Seasoned HDF Member
For years I got em with screw-on ends. Last set I got did not have. On the screw on ends, you simply mung the threads with some dykes and jam them on..
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d0ink001 (06-06-2024)
#23
12-16-2018, 10:43 AM
Road Master
HD replacement spark plugs
Here -
https://www.carid.com/champion/coppe...g-mpn-810.html
Last edited by lightweight bob; 12-16-2018 at 10:56 AM. Reason: Additional info
#24
04-29-2022, 06:02 PM
Stage I
Join Date: Apr 2022
Location: Vidor,Tx
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Hi guys,
I'm new here and this is my first post. I have a burning question (pun intended) about using iridium plugs in a 2006 twin cam 88. I bought and installed brand new NGK Iridium plugs in my engine. I soon noticed carbon coming out of the exhaust with a reduction in performance. I pulled the plugs and noticed they were fouled with a thick layer of fluffy carbon (sorry, I didn't think of taking a pic). The plugs I wanted to replace were the HD copper type. They worked well and there was no noticeable fouling on these plugs so there were no fuel/air ratio or ignition problems that I could see before installing the Iridiums. I just want a superior plug with a gain in performance and longevity. Would anyone know why this happened? has anyone had a similar experience or has anyone installed Iridium plugs in a similar engine without any issues? Oh ya, the bike is an EFI. Thanks for your help.
I'm new here and this is my first post. I have a burning question (pun intended) about using iridium plugs in a 2006 twin cam 88. I bought and installed brand new NGK Iridium plugs in my engine. I soon noticed carbon coming out of the exhaust with a reduction in performance. I pulled the plugs and noticed they were fouled with a thick layer of fluffy carbon (sorry, I didn't think of taking a pic). The plugs I wanted to replace were the HD copper type. They worked well and there was no noticeable fouling on these plugs so there were no fuel/air ratio or ignition problems that I could see before installing the Iridiums. I just want a superior plug with a gain in performance and longevity. Would anyone know why this happened? has anyone had a similar experience or has anyone installed Iridium plugs in a similar engine without any issues? Oh ya, the bike is an EFI. Thanks for your help.
#26
04-06-2024, 05:08 PM
Intermediate
Hi guys,
I'm new here and this is my first post. I have a burning question (pun intended) about using iridium plugs in a 2006 twin cam 88. I bought and installed brand new NGK Iridium plugs in my engine. I soon noticed carbon coming out of the exhaust with a reduction in performance. I pulled the plugs and noticed they were fouled with a thick layer of fluffy carbon (sorry, I didn't think of taking a pic). The plugs I wanted to replace were the HD copper type. They worked well and there was no noticeable fouling on these plugs so there were no fuel/air ratio or ignition problems that I could see before installing the Iridiums. I just want a superior plug with a gain in performance and longevity. Would anyone know why this happened? has anyone had a similar experience or has anyone installed Iridium plugs in a similar engine without any issues? Oh ya, the bike is an EFI. Thanks for your help.
I'm new here and this is my first post. I have a burning question (pun intended) about using iridium plugs in a 2006 twin cam 88. I bought and installed brand new NGK Iridium plugs in my engine. I soon noticed carbon coming out of the exhaust with a reduction in performance. I pulled the plugs and noticed they were fouled with a thick layer of fluffy carbon (sorry, I didn't think of taking a pic). The plugs I wanted to replace were the HD copper type. They worked well and there was no noticeable fouling on these plugs so there were no fuel/air ratio or ignition problems that I could see before installing the Iridiums. I just want a superior plug with a gain in performance and longevity. Would anyone know why this happened? has anyone had a similar experience or has anyone installed Iridium plugs in a similar engine without any issues? Oh ya, the bike is an EFI. Thanks for your help.
#27
04-14-2024, 06:33 PM
Intermediate
#28
04-16-2024, 10:57 AM
Stellar HDF Member
From my experiences tuning bikes, there is virtually NO advantage to using any other plug but solid top OEM or NGK 4179 (1 heat range cooler) plugs.
Also there is no way using a different plug will cause the engine to run significantly richer or leaner than with the original plug.
AFR is not controlled by the “spark” plugs. If that was true we could tune bikes with spark plugs rather than fuel calibration.
MAYBE, if the spark plug is so poorly designed, the engine may not run crisp, but the AFR cannot go from ok to black sooted by changing the brand or model of spark plugs. A good, strong spark is a good spark. It’s simply used to set fire to the AFR in the combustion chamber.
As always, JMHO, Bob
Also there is no way using a different plug will cause the engine to run significantly richer or leaner than with the original plug.
AFR is not controlled by the “spark” plugs. If that was true we could tune bikes with spark plugs rather than fuel calibration.
MAYBE, if the spark plug is so poorly designed, the engine may not run crisp, but the AFR cannot go from ok to black sooted by changing the brand or model of spark plugs. A good, strong spark is a good spark. It’s simply used to set fire to the AFR in the combustion chamber.
As always, JMHO, Bob
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