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My name is Tom Harris and I live in Owasso Oklahoma. I understand that there are some questions about the MYCHRON products that some of you may have seen on different forms of race vehicles.
The MYCHRON DATA LOGGERS are made by AIM sports in Italy and are imported and sold around the world. They are DATA Loggers not any form of engine controller like MOTEC.
As a DATA LOGGER all it is doing is electronically recording whatever sending unit you have attached. They started on go-karts in 1998 and are now on everything from open wheel dirt cars to road racing vehicles. Some sanctioning bodies actually mandate running one so they can come back and look at the vehicles RPM during a tech inspection to ensure they have a stock rev limiter.
What most racers need want to know is RPM, Fuel Pressure, Water Tempter, Lap Times, Oil Pressure and the big helper in performance is knowing what the fuel system is doing under load and real time track conditions.
The MYCHRON gives the racer the ability to "Trouble Shoot" his system during race conditions, then go back and make an adjustment to fuel pressure and jetting to get the correct Air to fuel ratio for the best performance.
The MYCHRON is designed to take the guessing out of problems that always come up.
You can also get a track mapping function that will let you look at each bit of information in relation to where you are on the track. What most racers would like to know is what is happening on that pull from corner exit to the next corner. Did the fuel system keep up? Did the motor go rich? For the MYCHRON to make a map of the track it needs two things. First there is an accelerometer that senses where the corner is, second it needs to know how far the car is traveling around the track. To get the distance we use a wheel speed sensor that tells the MYCHRON every time the tire makes one complete revolution. If the tire is 60 inches around it measures 60 inches, 60 inches over and over around the track until it figures out the length of the track. It uses both sets of information to determine what the track looks like.
Then you can pull up the track map and look at what your engine is doing during that pull from corner to corner.
As I said the system is a DATA LOGGER only it is just like a tell tac except it records more channels of information. As it is not an engine management system is has no capability of sending any signal back to the cars fuel system of ignition system. It is recording information only.
As to traction control most of you that have researched it know that it is very expensive, I their the article in circle track said the most crude non hidden system was up around $5000 dollars. Don't quote me at that since I have not personally researched it and am not interested in the traction control business. The MYCHRON DATA LOGGERS sell for around $1400 with an o2 sensor. So you can see that even the price is nowhere close to what I am told those guys sell traction control for.
That said we put them on the front wheel just so there are no questions.
I would be happy to show anyone what the wiring harness consisted of and they could plainly see that there are no wires going out only coming in from the water sensor, rpm output of the ecu ect.
There are no big secrets here. AIM is a respected company that sells world wide and has full technical specifications on their website for the world to see.
They have been accepted as an industry leader in Data Acquision by many sanctioning bodies all over the world.
The secret to going fast is having good information. Some guys can look at a car and know just what is happening, others can hear a motor and diagnose the problem....then there is the rest of us that need a little help in understanding what is going on in the fuel system or suspension. That is where the MYCHRON comes in.
I tell people that "You don't know what you don't know" until you get a MYCHRON. Then all those little pieces of the puzzle that it takes to be fast can be looked at on track in real time. You and not the MYCHRON can then make a good decision and make the correct call.
No big secret here just real time information for the team that is tired of guessing at what is going on under the hood.
I have copied a letter from the manufacture that gives a more technical explanation of the system and its limitations.
I would be happy to speak to anyone who has some questions or concerns regarding the DATA LOGGERS.
Thanks , and Safe Racing
Tom Harris
HD Racing
918-606-8498
APPLICAZIONI INDUSTRIALI MICROPROCESSORI
________________________________________________________________________________
Aim srl sede legale ed amministrativa
C.C.I.A.A. MI948585 Reg. Soc.Trib. Mi n. 171956 VIA CAVALCANTI, 8
Codice Fiscale e Partita IVA 03118020159 20063 CERNUSCO SUL NAVIGLIO MI ITALY
Capitale Sociale Euro 31.200 TEL +39-02-9290571 FAX +39-02-92118024
E-MAIL [email protected]
www.aim-sportline.com
Cernusco sul Naviglio June 25th, 2008
RPM and Speed management
AIM products for auto/bike applications, MXL, MyChron 3 Plus, MyChron 3 Gold,
M3XGLog and EVO3 loggers have the same rpm management circuitry, so they acquire RPM in the same way.
Three possibilities are offered:
a) from the low level of the coil. The Primary of the Coil gives a signal at about 300- 400 Volts at a frequency proportional to the Engine Number Revolution b) from a 5-12V square wave. This signal is generally an output coming from some ECUs, and it is normally used for managing electromechanic analog niddle rpm gauges. Our systems offer an input dedicated to this signal c) directly from the ECU. Our systems can manage the datastream produced by many programmable ECUs, both in CAN that in RS232.
N.B. Our systems are dashes and loggers, not Engine Controllers. The impedence, the circuit, the RPM management of our products IN NO WAY can alter, neither in positive neither in negative, the engine behaviour. It is not possible, using our systems, to modify the maximum rpm value, to change the rpm limit, to increase or decrease the spark level . Our products don't even offer any output that can be used to modify the engine behaviour or to vary carburetion.
Dealing with speed management, our systems receive the speed signal, generally a pulse every wheel revolution, and cannot, in any way, be used for an automatic speed control. They cannot be used for traction control, antislip, ABS, ESP and don't offer any output for changing or controlling the speed, neither of the vehicle, neither of a single wheel.
The same consideration are valid even if our systems are connected, by CAN, to our slave extensions: GPS modules, lambda controllers, datakeys or channel expansions.
Aim s.r.l.
Enrico Rosignoli
President
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