Mailing List flyrotary@lancaironline.net Message #55424
From: wrjjrs@aol.com <wrjjrs@aol.com>
Subject: Re: [FlyRotary] Re: Plug heat range
Date: Thu, 23 Jun 2011 14:47:22 -0700
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Lynn,
Good advice as always. If I remember correctly NGK higher number colder, while Champion lower number is colder.
Bill Jepson
Connected by DROID on Verizon Wireless


-----Original message-----
From: Lehanover@aol.com
To:
Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent:
Thu, Jun 23, 2011 19:02:07 GMT+00:00
Subject:
[FlyRotary] Re: Plug heat range

 
 
In a message dated 6/23/2011 12:31:07 P.M. Paraguay Standard Time, wgeslick@gmail.com writes:
Lynn,

My plugs always have a rounded tip after 15-20 hours.  By then they are mis-firing at idle and I chuck them.  (Actually I have a large drawer full of them from the last 735 hours of operation!)

These are the factory NGK BUR7EQ and 9EQ (cheap).  If I were to try a colder plug, I am stumped on the listings about what to try and which will fit without grinding off those ears on the rotor housing.

Could you steer me to a part number that I could try?  No liability, I promise.

Bill Eslick

13B NA
 
The higher the number on NGK plugs the colder the heat range.
 
Try the 10s in fine wire if you can find them. I use 11.5s to race on.
But $25.00 each is a bit steep. I had some Champion N-57Gs and N-82s I was using. The 82s are a bit hotter but caused no trouble. Any cross to the N-57G heat range would work fine. NGK B10EGV Is the cross for the Champion and has the gold Palladium fine wire tips.
 
 
Here is a nice site with crosses for heat range. I will find those Autolight plugs and get you that number.
 
Lynn E. Hanover

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