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Message-ID: <427A3129.7000200@earthlink.net>
Date: Thu, 05 May 2005 09:43:53 -0500
From: David Staten <Dastaten@earthlink.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Wanted: 89-92 4 port LOWER intake manifold
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Well guys, I pulled a stupid and cleaned out the garage a few months 
back.. and something I did was throw out all the heavy intake parts for 
the 3 engines... I saved the throttle bodies on 2 of em... just in 
case... but I chunked many many pounds of cast AL on the presumption 
that I would be getting Bruce's intake when it became available.
 
Bad Move. The Turretine Intake  will interfere with the turbocharger 
(when installed).. so.. I am back to square one. I guess I will be 
pulling an Ed (Anderson) and taking a portion of a stock lower intake 
manifold and  using it as a 90 degree turn/flange for me to mount 
aluminum tubing into, and then have that merge into a stock throttle body.
 
So.. if anyone has a stock 4 port 89-92 lower intake layin around and 
wants to part with it, let me know. I will take one off your hands so 
that I can start building my intake.
 
On a side note, I am leaning towards the stock throttle body because of 
an idea I have.. Several folks have mentioned issues with low MP/low 
power idle.. and I believe part of that can be solved by using the stock 
TB (or a stock 20B TB). When you actuate the stock mazda TB.. the 
primary throttle opens a bit before the two secondary throttle plates 
even budge. The net effect of this is, at very low power settings, air 
is entering only through the primary ports, and the fuel (when staged) 
is only entering through the primary port injectors. Most of the intake 
arrangements (not all) that I've seen are using one big TB.. so ALL the 
ports are getting airflow, when at low RPM this can be counterproductive 
(lower airflow velocities through multiple paths, rather than higher 
through a single path). Those using multiple small TB's on individual 
runners can mimic the stock TB in this manner by adjusting the linkages 
to the primary runners to open first.
 
Anyways,,  Take a look around the garage or hangar and see if you can 
help me out. I will pay shipping and a reasonable price for the part.
 
Dave Staten