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Date: Sat, 28 Aug 2004 07:38:55 -0600
From: Perry Casson <pcasson@sasktel.net>
Subject: Re: Engine run-vacuum accumilator
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Al,

Here's a clip from I email exchange I had with Tracy a while back. For 
me the trick to getting a smooth idle and a balanced mixture between 
rotors at high power was to measure the MAP right behind the throttle 
body so to minimized the effect of the pulses in the runners.


Perry Casson

Perry Casson wrote:
 >>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

Tracy Crook wrote:
 >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
Al Gietzen wrote:

> Are we quite certain that there is no averaging going on in the EC2? 
> Seems unlikely – in any case; the system worked fine on the dyno.
>
> AL
>