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Lean plug

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sparky

Posts: 118

Joined: Tue May 29, 2001 12:01 am

Location: cornwall, ontario,canada

Post Fri Apr 20, 2007 5:03 pm

Lean plug

O.K. guys!!!! I have a 48 Chief (Bonneville). The plug in the front head is recessed in more than the rear plug (sits much deeper in the head). Is this the way they were designed? The front plug is much leaner than the rear plug. There are no leaks at the head or intake manifold. When I removed the head, there was significant carbon build-up in the combustion chamber. If I enrichen it any more the pipes get real sooty and the engine begins to load up. Any ideas????
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Cotten

User avatar

Posts: 2676

Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Fri Apr 20, 2007 6:49 pm

Sparky!

How did you make certain that "there are no leaks at the head or intake manifold"??

Just asking.

....Cotten
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sparky

Posts: 118

Joined: Tue May 29, 2001 12:01 am

Location: cornwall, ontario,canada

Post Thu Apr 26, 2007 1:23 pm

Cotten, I took the carb off and made a block on the manifold. I put air into the manifold at about 7 lbs. Some air did leak out but it took a while.
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Cotten

User avatar

Posts: 2676

Joined: Thu Sep 30, 1999 12:01 am

Location: Central Illinois, USA

Post Thu Apr 26, 2007 5:47 pm

Sparky!

Any bubbles at all are too many.

....Cotten

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