Pulling Plug Coils

[Olly]

When you pull the coils out of a plug could you use a colder plug ??

Thanks

Olly

 

[Joe_Knesek]

I don't change the heat of the plug.

 

[AndyBrown]

Technically yes.

If you are using a hot plug in stock form you could use a colder plug with the wire pulled and the colder plug would burn the fuel as well or better than the hot plug.

The added benefit would be that the colder plug would hold up better.

If you have a good needle setting with a stock plug and then you pull the wire on the same heat range plug you must richen the mixture a little because the pulled element will burn more fuel.

 

[Tony Jacuzzi]

Andys explanation probably is the reason when I tried to do this I was burning up plugs. How far out should the coils be pulled? Can some one post a picture of a "good" pull.. Thanks Tony J

 

[Don Ferrette]

Andys explanation probably is the reason when I tried to do this I was burning up plugs. How far out should the coils be pulled? Can some one post a picture of a "good" pull.. Thanks Tony J

How's this.........

 

[AndyBrown]

They Art of pulling coils! lol

That is good Don.!

I like to pull two coils, however, I have not seen any performance difference between one or two.

 

[Don Ferrette]

Actually if I gave more of a straight side shot there's just about 2 coils out of the body.

 

[Olly]

Don

Which plug is that? It looks like a cold plug to me??

Thanks

Olly

 

[Don Ferrette]

McCoy MC-9, I run them in all my MAC motors from the 21 to the 84's. B)

 

[shoboat]

Hey Don,

When it gets hot out you may want to try a hotter plug MC-59 with the MAC 21.

We tested this quite a bit,and the hotter plug seemed to work a little better

when it was hot and humid outside. Just a thought! Giving out some helpful

information. BTW, Happy Birthday Don ,you are as old as I am now. :lol: :lol:

Thanks,

Mark Sholund

 

[Don Ferrette]

Thanks for the tip Mark. When we start roasting down here around August I'll try it. B)

 

[waterbug]

 

 

Guys do you preheat the plug before or after pulling the coil ??? or not at all ???

 

 

[Don Ferrette]

 

 

Guys do you preheat the plug before or after pulling the coil ??? or not at all ???

 

I ALWAYS pre-heat plugs (after pulling coil). Pre-heating anneals the winding & makes it last longer. Rod Geraghty turned me on to this a number of years ago & it sure increased plug life. This had the biggest impact on MC-9's as the wire is a bit thicker & it gets brittle when they wind the coil. B)

 

[Eric Perez]

What are you using to pre-heat the plug with? Would a glow-igniter work okay (It does glow-red hot) ?

 

[Don Ferrette]

What are you using to pre-heat the plug with? Would a glow-igniter work okay (It does glow-red hot) ?

Yup, just hit your glow driver on it for about 15 seconds then let it cool down for a minute or two, that's it! B)