It's a side port (4 inlet 3 exhaust) I am putting it in as it is
 (factory assembled) for now, I may p-port it at a later stage. I will be
 using a rotec throttle body (don't want a computer)  had one on my other
 EZ, boy was it economical.
 Also I was wondering if you had a circuit diagram for a CDI that will be
 triggered by a couple of hall effect sensors ?
          Cheers Chris in NZ


   The stock manifold is rather high but it will probably fit in an EZ.

 What I have on my list of things to do is build a 12 volt high voltage
 supply for capacitor discharge ignition systems using a new chip by
 Linear Tech.

 The LT®3751 is a high input voltage capable flyback controller
 designed to rapidly charge a large capacitor to a
 user-adjustable high target voltage set by the transformer
 turns ratio and three external resistors.

 The actual CD circuit is the same as the outboard/Vespa and the TC 3
rotor
 CD systems.

 That Rotec "throttle body" is a copy of the American Ellison
 carb :) It will work great when you get it sorted out. See notaposa.pdf


 Paul Lamar




 Chris,
 I am using the Rotec on my 12A based single rotor. I agree with you
that it
 is a great item. One thing I found out as an issue is the fact that
it does
 not operate properly when installed an cross flow position and the slide
 throttle horizontal. Rotec never gave me an answer to that finding.
 I also am using a tuned intake, which required a relocation of the
 reference
 pressure probe.
 This was the best thing I have tested short of EFI .
 FWIW.


 Richard Sohn
 N2071U

http://www.fairpoint.net/~res12/home.html
<http://www.fairpoint.net/%7Eres12/home.html>

Richard,
    Are you using the  TBI-40-3 ?
John Gibbons


Richard,
   Thanks for the tip about the T/B. I will be installing it the same
as you by the looks of it, with the slide in the vertical plane, I am
using the 48-4/5. Why did you need to move the reference pressure probe,
was it for a physical reason ?
       Cheers Chris.

Chris,

When you add an intake tube to the outside of the TBI, you have to try
maintaining the 40mm diameter all the way to the slide throttle, so you will
not lose a lot of the tuning effect by changing the cross section.
I made me an insert eliminating the built in intake trumpet, and with this.
the pressure pick up is put out of the air stream. This is only the physical
problem. The other issue is, if you pick up the pressure in the TBI at the
40mm diameter, the static pressure is getting low enough at WOT to totally
close the pressure regulator.  You need to take advantage of the dynamic
pressure increase at WOT for maintaining a rich mixture.
It took me about a year to get all that right, including the orientation
problem.

Keep asking when you get there, I will be glad to help.


Richard Sohn
N2071U

http://www.fairpoint.net/~res12/home.html

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