Paul,

    Getting some sort of standardized, low cost, easily understood,
    well-documented EFI system for aircraft Wankel engines would be
    welcomed by many.  But those people are primarily
    computer/electronic/microcomputer hobbyists or those looking for the
    last 10% in fuel efficiency or performance.


    For the rest of us, a
    cheap, simple carb-based setup would get the job done in a very
    straightforward manner.  Heck, if I were enthralled with the EFI
    experimentation I might _still _route the injectors parallel with a
    dead-simple Holley carb as a back-up.  One twist of a valve would
    open the fuel line to the Holley and a switch at the end of the valve
    throw would disconnect power to the injectors.

    A proven, inexpensive PSRU is the "most needed" item right now for
    the majority of us.

    My humble opinion.

    Mark Waldron

    Neil Unger is building six PSRU's as we speak. Get your order in
or get left out. These are 3.12 to one with the proper rotation.

Neil Unger2 <"<unger1948"@bigpond.com>>

Paul Lamar

-----------------------------------------------------------

Here is a super simple side draft carb that uses an  off the shelf Holly
float bowl and a MacNealing leaning kit.

Contact Larry Childs.

Larry Childs <larry@designitprototype.com <mailto:larry@designitprototype.com>>

I have a bunch of slide throttle kits to go along with it
for $50 dollars each.


Paul Lamar


Here is a slightly different configuration. It is a little weird but
it will fit under a low cowl. It is made from stock 180 and 90 degree
2 inch OD tubing bends tig welded together. Real low cost on ebay

The only difference is the aluminum plate that mounts the stock holly
float bowl
is a bit longer. That gives a bit more room for the fuel plumbing on the
sides of the float bowl.

BTW Larry Childs did those incredible rotor housing 3D models.


Paul

Paul,

Why not use off the shelf injector style carbs, like the revmaster or rotec? They are pretty simple and readily available. I would think that a pair of the 40mm ones would be ideal for a 13B. Am I missing something with this idea?

Referring to the TTC engine, I know that you are committed to EFI for good reasons. Are you guys going to fit a MAF sensor between the air cleaner and turbo? I would think that a MAF sensor adapted from a late model Corvette or Mustang that are designed to handle 600+ hp flow in conjunction with a wide band O2 sensor in the exhaust would greatly simplify the mapping and move the project towards "self-tuning". Are the exhaust temps so high that it will melt an O2 sensor?

Alan Mullen
Colorado

40 mm is not going to cut it.  dual 50 mm minumin.

Rotec are very very expensive but good carbs.
They are not injectors as advertised.
They are a copy of the ellison. Kind of delicate
as they use pressure very close to atmospheric
regulators.

also we need a dual throat.

 revmaster are expensive but too small at 40 mm.

These are single throat carbs

Might be OK for a one rotor.

Paul Lamar


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