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Subject: [FlyRotary] Where MAP is measured matters
I've been having a problem with the mixture balance between rotors
changing as RPM increases on my 13B from day 1 with my install. In my
case I had installed the MAP connection in a convenient hole on the
primary runner for rotor #1 of the stock 6 port lower intake manifold.
I wrongly assumed the response time of the MAP sensor would be slow
enough to damp the pulses in the intake but obviously this is not the
case. Moving the MAP connection to be just after the throttle body
completely resolved the problem.
Perry Casson Glastar/13B - 20 hours
http://eaa154.dhs.org/perry
The MAP sensors read pressure in REAL TIME and do it once for each rotor on
every turn of the crank. They must see the summed pressure of both rotors.
Do exactly as Perry suggested.
Tracy Crook
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