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Hi kevin,
I'm going on a old memory that may be wrong but I seem to remember a picture of your manifold that looked like the two Webber barrels dumped into a common chamber. If that is true, you should start over and keep the barrels separate, i.e., one to each rotor. Even if this is not the reason for your mixture mismatch now it is the only way to go.
Tracy
On Mon, Jul 5, 2010 at 11:19 PM, kevin lane <n3773@comcast.net> wrote:
I have just started running my engine on a test
stand. currently it will only do 4000 rpm. I noticed the rear rotor
exhaust has turned blue. I pulled the plugs and the rear lead and trail
plugs were very sooty. the front rotor trailing plug was clean, lead was
black. I suspect that my trailing ignition for the front plug may not be
running correctly. getting started I have been running whatever jets that
came with the carb. it appears I need to change them, to smaller I
assume. do I need to install a mixture gauge? does it attach to the
exhaust or intake? if so, which pipe(s)?
the facet electric pump delivers the rated 30
gals/hr [at zero psi], but my fuel pressure gauge only shows about 2 psi.
is it possible that I have fuel starvation above 4000 rpm? the specs say
that the pump has a 4-8 psi range. not sure why I am seeing only 2 psi.
even at idle. the fuel lift is all of a few inches. I removed the
fuel pressure regulator, but no difference.
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