Iridium Spark
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=142416
Printed Date: 24 Nov 2024 at 2:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Iridium Spark
Posted By: Phil48ACWC
Subject: Iridium Spark
Date Posted: 13 Sep 2017 at 5:36am
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Has anyone found an Iridium spark plug that works well in a WC or WD with WD45 Crank and 7:1 Compression Ratio? Thanks.
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Replies:
Posted By: PaulB
Date Posted: 13 Sep 2017 at 4:25pm
NGK XR4 is what I've found to be an iridium resistor plug equivalent to an AC R45S through an AC R47S. NGK plugs have a broader heat rage capability that most any other brand spark plug. The "S" on the end of the AC plug designates an projected tip design, which helps extend a plugs range a little bit.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Posted By: Phil48ACWC
Date Posted: 14 Sep 2017 at 12:05pm
Posted By: Phil48ACWC
Date Posted: 25 Sep 2017 at 1:35pm
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I bought a set of these NGK Iridium Spark Plugs from Rock Auto (best price). The full part # is XR4IX / 7189. My WC has never run better.. I had a brand new set of Autolite 295 in there and Number 1 plug would occasionally miss. Number 1 plug had a little color on the porcelain and all the other plugs were clean and like new. I swapped it with # 3 cylinder and then # 3 cylinder started to miss. So the miss followed the plug. I'll never run a conventional plug in anything I own again. NGK Iridium Plugs are a great product!
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Posted By: PaulB
Date Posted: 25 Sep 2017 at 5:06pm
It's not so much the Iridium plug as the NGK brand. As much as I hate to say it, American plugs are not to quality they used to be. I use the B6S in everything but the pullers, They last for years. I won't ever waste money on Champion, AC or Autolite plugs any more. If I can't get NGKs I'll buy BOSH.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Posted By: Phil48ACWC
Date Posted: 26 Sep 2017 at 6:28am
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I used to have good results with Autolites. Not anymore. AC and Champion were junk 30 or more years ago and in my opinion still are. I'm sold on the NGK Iridium Plugs now. I build my engines with the best parts and procedures to get best performance. This includes Street Rods, Motorcycles , and of course Tractors. Then a spark plug skips and misses???? Unacceptable!!!!!! I'll spend the extra money for quality stuff that performs every time.
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Posted By: Coke-in-MN
Date Posted: 26 Sep 2017 at 9:07am
Odd as the NGK that were in a bike I just bought were about 1000 miles old - tried to start it (NO GO) changed plugs to Champion RN7YC second kick heard that sweet music of a running engine .
Only thing 700 miles and bike was hard starting - pulled plugs - slight tan color but wet - put in N5C plugs (non-resistor) first kick back running .
Have had good luck with champions over other brands in my Nortons - both Mag ignition and point/ coil systems
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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