Haltech vs. Electromotive vs. Wolf 3D vs ???

[Diego Martin Monteverde]

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Thanks!
It's good information.
Please see below for mi comments/questions:

-----Mensaje original-----
De: Greg Hermann <bearbvd at cmn.net>
Para: Diego Martin Monteverde <mmontev at sinectis.com.ar>
Fecha: Mi_rcoles 9 de Febrero de 2000 23:54
Asunto: RE: Haltech vs. Electromotive vs. Wolf 3D vs ???


>>Hello Greg,
>>
>>Could you give me some comsiderations about the mentioned ECUs?
>>I mean, what to look for in an ECU, or what are the weak and strong points
>>that you know.
>>Your experiences would be appreciated
>
>Hi Martin--
>
>Here is a start at it!
>
>1. What processor do they use. The Motorola 68332 is a VERY capable one.
>
>2. What is the minimum incremental change in injector PW (pulse width) in u
>(micro) seconds which the ecu is able to make. I think you would find that
>the Haltec will only do 64 u-s increments, but that the Autronics box will
>do 8 u-s increments! Worrying about this difference may sound silly, but
>the finer tunability can be VERY significant in getting an engine to idle
>decently.
>(If you calculate approximately what you expect your injector PW will be at
>idle for your engine, with the size injectors you will need for top end
>power, and then calculate the % change in A/F ratio that either a 64 or an
>8 u-s increment in that PW will make to the idle A/F ratio, you will soon
>understand what I am concerned with here in terms of being able to tune the
>engine to idle properly!)
>
>3. Does a unit have injector drivers capable of driving "peak and hold"
>(low impedance) injectors or not.
>
>4. How many features and how easy to use is the software.
>
>5. Can the software make "on the fly" changes to the tuning of the engine?
>(Can you change things while the engine is running?)
>
>6. How much input/output is the box capable of-- you may want to consider
>whether it has inputs/outputs for the following: (and other questions)
>Exhaust back pressure
>Fuel pressure
>Inlet air temperature
>Fuel temperature
>Barometric pressure
>Ambient humidity
>Exhaust gas temperature (how many channels?)
>Vehicle speed input
>Boost control output
>Accelerometer (vehicle acceleration) input


Do you know about some accelerometer with a scale fitted to read "normal"
accelerations? I've only found +/- 4G, too much for tuning a non drag car.
The same about any ECU with such an input? How does they work? They "stores"
the acceleration value toghether with the rest of the ECU readings for later
analisys or are able to do some adaptive optimization on line? Do you know
any brand?

>
>How many injectors can it run independently of one another?
>
> (On a seriously high performance engine, it can be _VERY_ advantageous to
>run two (staged) injectors per cylinder. My own preference would be to run
>primary injectors of about 33% of the needed flow capacity, and secondary
>ones of the remaining 67% of the needed capacity. Taking this approach can
>have tremendous advantages in terms of giving an engine very good "street"
>manners and improved fuel economy as well.
>
>How many ignition outputs does it have? (Enough to run a distributorless
>system??)
>
>What kind of a laptop computer will you need to set up and tune the box
>conveniently?
>Can the unit do any data logging?
>Is a true wide band O2 input an option for the unit? How many channels?


Could you explain me the use of an O2 sensor in a sport application? Isn't
it open loop?

>
>Is it capable of operating in a "closed loop" mode with a wide band O2
sensor?
>(for instance, with the Federal Mogul "Speed Pro" (formerly the Fel Pro
>Performance) box, one can program the box with the WBO2 option to run
>closed loop to any target A/F ratio you wish to program it for!)
>
>How much "limp home" capability does the unit have?

Sorry, what means "limp home"

>Does the unit use easily available, mass production sensors, or the sensors
>proprietary and expensive?
>
>Does the software for the box allow such things as limiting boost when the
>vehicle is in a lower gear?
>(If a box has an input for vehicle speed, it is relatively easy for the box
>to compute what gear the transmission is in by comparing vehicle speed to
>engine rpm. With a serious engine, limiting boost in lower gears can save
>the transmission, the driveline, and the tires considerable distress and
>damage!)
>
>Does the box have any traction control and/or rev limiting capabilities?
>
>Can you use the software to adjust the units injector and ignition timing
>independently for each cylinder--so that you would have the capability of
>finding the TRUE top dead center crank angle for each piston (with a dial
>indicator and a degree wheel), and be able to adjust the box's timing
>according to any slight errors in the engine's mechanical geometry?


The last: Do you know something about "MOTEC"? I visited their site, and
seems really serious.

Thanks again

Martin

>>
>>-----Mensaje original-----
>>De: Greg Hermann <bearbvd at cmn.net>
>>Para: Diego Martin Monteverde <mmontev at sinectis.com.ar>
>>Fecha: Mi_rcoles 9 de Febrero de 2000 00:46
>>Asunto: Re: Haltech vs. Electromotive vs. Wolf 3D vs ???
>>
>>
>>>>Hello,
>>>>
>>>>I'm trying to learn about the different commercial "programmable"
>>electronic
>>>>management systems that are currently on the market.
>>>>I'm interested in those that are capable of both injection ans spark
>>>>control.
>>>>
>>>>My idea is to know about the different features that they offer, strong
>>and
>>>>weak points.
>>>>Up to now, I discovered three different units: Haltech, Electromotive
and
>>>>Wolf 3D.
>>>>
>>>>What I'm asking to the list are the different experiences that the
members
>>>>may have about these three systems or (I suppose) the lot of other ones
>>that
>>>>exist, known pros and cons of them or amy info in this way.
>>>>
>>>>I will appreciate any info that the group could give me.
>>>>
>>>>Thanks and regards,
>>>>
>>>>Martin
>>>
>>>Hi Martin--
>>>
>>>Go to <www.turbofast.com.au> and check out Autronics. Their box is WAY
>>>superior to any of the three you have mentioned. There are also some
>>>excellent British boxes.
>>>
>>>Greg
>>>
>>>
>>>
>
>
>

----- End of forwarded message from Diego Martin Monteverde -----
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