X-Mozilla-Keys:                                                                                 
Anderson Ed wrote:

Paul wrote:

Finn Lassen wrote:

Ok, I'm back to jetting my carbs and final engine runs before taking the
plane to the airport for assembly.

At 1000 - 1200 RPM I am getting 20 in Hg MAP. Is that normal or should I
look for air leaks (false air) before drilling up the idle (slow) and
main jets?

Hi Finn,
 I just completed putting my 13B back together and at 1800-2000 rpm I am
getting 15 in hg of manifold vacuum.  Mine is fuel injected with a dual
throat Weber throttle body.  Possibly an air leak might cause the
conditions you describe.  Sounds as if choking it adds more fuel causing
the fuel/air mixture to get closer to what it needs to be.

Ed Anderson

 
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