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.28 mac bogger

 
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kelsco99



Joined: 24 Jun 2009
Posts: 8
Location: Ontario

PostPosted: Fri Jun 26, 2009 4:34 pm    Post subject: .28 mac bogger Reply with quote

i switched the .21 back plate on to the .28 mac.i ran 2 tanks at top speed seems ok.but i still have a slight bog on bottom.lean or rich it bogs slightly.has new clutch to.had a well known engine tuner try to tune it he had same problem.engine is now known as the bogger.thought the pull start leaking was the cause but at least my chassis will be cleaner. is there a known problem?
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kelsco99



Joined: 24 Jun 2009
Posts: 8
Location: Ontario

PostPosted: Sun Jun 28, 2009 5:38 am    Post subject: Reply with quote

im wondering if the pipe is the problem it is an old ofna pipe .21.has good top end.could it bog on bottom with wrong pipe.
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Aron1



Joined: 09 Oct 2007
Posts: 61

PostPosted: Sun Jul 12, 2009 9:58 pm    Post subject: Reply with quote

kelsco99 wrote:
im wondering if the pipe is the problem it is an old ofna pipe .21.has good top end.could it bog on bottom with wrong pipe.


Hi, try to remove one head shim. You will be able to rich a little the top end,
and temp will come down.

Aron
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kelsco99



Joined: 24 Jun 2009
Posts: 8
Location: Ontario

PostPosted: Sun Oct 04, 2009 3:27 pm    Post subject: Reply with quote

it was the pipe old ofna .21
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