http://www.haltech.com/




 Source: 8.6 to 16.5 Volts DC
 Consumption: 530mA @ 12Volts DC

 Physical Dimensions:
 ECU Dimensions Length: 154mm (174mm 6.85" with MAP nipple)

Width: 158mm 6.22" Height: 42mm  1.65" Weight: 680g 1.5 pound.

 Price: $1,587.00
Includes Free Ground Shipping!


Bruce

Yes I have heard of them as well as a half dozen others.

They don't give you what you want to know on the instrument
panel. They are also way more money than the PC solution.
The PC can store 64 Gig on just one USB stick. Not just 500K.
It can also log data every second.

Closed loop O2 control does not work with 100LL aviation
fuel. The lead contaminates the O2 sensor.

The fact of the matter is the modern $80 PC Intel Atom mother board is
ten times as powerful as the processor your likely to find in these
automotive ECU's. When you add the $90 Hytek you have a total of 3
processors all working together.

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Here is the specs for the 2 rotor version.


Paul Lamar



Paul, The issue of failure due to lead contamination with the oxygen sensor
is not what disqualifies them for closed loop operation on an aircraft
installation. The range of the oxygen sensors is approximately 11.2 to 1
thru 14.3 to 1 fuel mixtures. In our case we desire at cruise to reduce
power by leaning to nearly 20 to1 for less fuel burn per hour.

       The BSFC of an engine is primairly driven by the mechanical
mechanisms of the engine as they effect pumping losses and heat lost to the
cooling system. These considerations affect the horsepower produced per
pound of fuel consumed.While I can't do anything about the short stroke
compared to swept volume of the engine which Mazda has already optimized, or
produce ceramic rotors and side housings to eliminate cooling system losses
I can modify the air fuel ratio for less than maximum power settings.

       IMHO any engine management system needs to be able to reach the
leanest running condition the engine will operate at and produce optimum
miles per gallon. What that indicates to me is that reducing cruise speed
from 220 to 195 MPH can save 1/3 of the fuel and still be covering over
three miles a minute.

      Any  automotive aftermarket fuel system that reverts to only a look
up table when the oxygen sensor is out of range will never do us any good.It
is possible to construct an open loop only system. We have the example of
Tracy Crooks's  MAP style open loop system with in flight adjustment of air
fuel ratio with an impresive record of reliability at an affordable cost.
Having a system that is plug and play with no user input would be
attractive, and any system with a really low cost is always appealing.

       I have been wondering if there are any concerns related to
barometric pressure, humidity and composition of the atmosphere at higher
altitudes causing problems with spark plug leads or electronic components
which might arise with the experimental aspect of  homebuilts. I can put a
six rotor in an old E type Jaguar for a daily driver while I build the
airframe (so I can use up an old supply of lucas smoke) but I don't want to
transplant any of the prince of darkness onto my airframe.

george grimes

You can get 20:1 to 10:1 wideband sensors but they are still
contaminated by 100LL Lots of Lead fuel.

People are working on ceramic rotors and other adiabatic ideas
but only 25% of the waste heat goes out the cooling system.
The vast majority goes out the exhaust and that is why turbo compound
is far more productive.

Paul Lamar