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Spark Plug Adapter

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phcarter(at)aol.com
Guest

Posted: Mon Jun 30, 2008 3:17 pm Post subject: Spark Plug Adapter

Does anyone sell adapters from U.S. standard shielded aviation spark plugs to automotive spark plugs?   

   

Preston Carter  

N6209F  [quote] [b]

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dsavarese0812(at)bellsout
Guest

Posted: Mon Jun 30, 2008 4:17 pm Post subject: Spark Plug Adapter

Why not do the entire changeover to the automotive conversion  using my kit?  I've shipped over a hundred of these kits all over the world  without problems.  Read about it and see a few photos of the installation  on my web site.  http://www.yak-52.com/plug_conversion.htm   You can also download the complete 14 page installation instructions with lots  of color photos of the entire process.

  

 Dennis

  

  

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n395v

Joined: 10 Jan 2006
Posts: 450

Posted: Wed Jul 02, 2008 4:35 am Post subject: Re: Spark Plug Adapter

Dennis,



Are their any problems with the automotive plugs at high altitude ie: 18K+?  Any of your customers routinely fly them this high?

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_________________
Milt

dsavarese0812(at)bellsout
Guest

Posted: Wed Jul 02, 2008 4:48 am Post subject: Spark Plug Adapter

Not that I'm aware of.  But then again, I don't know if anyone is flying at 

18K+ altitudes either with the conversion kit.  You may want to post the 

question to the RV list since some of the RV's are flying with automotive 

conversions and some may also be flying at the flight levels.

Dennis



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sd737(at)aol.com
Guest

Posted: Wed Jul 02, 2008 5:09 pm Post subject: Spark Plug Adapter

I've flown my Lancair 360 up to 22K and it has a set of auto plugs in the bottom holes fired by electronic ignition and the thing ran well at high altitudes.  The upper plugs were running on a magnetto.

    

   

 

 

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cjpilot710(at)aol.com
Guest

Posted: Wed Jul 02, 2008 5:57 pm Post subject: Spark Plug Adapter

In a message dated 7/2/2008 9:10:08 P.M. Eastern Daylight Time,  sd737(at)aol.com writes:

  

 Years ago I remember hearing about engine problem the Hellcat was having at  high altitudes.  The test folks couldn't figure it out, because it only  happened high up and all system tested normal on the ground.  The test  pilot went to talk to the Republic test pilot because the P-47 was using the  same engine and readily got to 30K.  It turns out the ignition harness  system on the P-47 was pressurized and the Hellcat not.  The lack higher  density air, the wiring was shorting out.  Many of the bombers had  pressurized ignition harness. 

  

 Jim "Pappy" Goolsby

 [quote]   I've flown my Lancair 360 up to 22K and it has a set of auto plugs in the    bottom holes fired by electronic ignition and the thing ran well at high    altitudes.  The upper plugs were running on a magnetto.

    

   

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petervs(at)knology.net
Guest

Posted: Thu Jul 03, 2008 7:33 am Post subject: Spark Plug Adapter

I don't think there is any correlation between the plugs and wires and

misfires at high altitudes. The occurrence of high altitude misfires is

typically due to arc over inside the magneto. On the ground the arc occurs

in the combustion chamber in the spark plug. The gap is set so that under

pressure this is the most likely place for the arc to occur. As you go up in

altitude the pressure inside the combustion chamber stays relatively the

same, but the air pressure inside the mag gets lower and thus it is easier

for an arc over in the mag to occur. Airplanes that fly to higher altitudes

have pressurized magnetos and ignition systems to keep the most likely place

for the arc to occur in the combustion chamber. Another thing to do is to

keep your plug gap at a minimum, typical plug gaps are 0.016 to 0.021 inches

and if you fly at high altitudes you want to check your plug gap more often

and set it to the smallest end of the range.



Squatch out.



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