| Author | Message | ||
     Willmrx |
Has anyone ever used a Dobeck EJK tuner on the 1125R. A friend just got one for his Yamaha. They make one for the 1125R. I did a search and nothing came up. | ||
| Stevel |
I don't know why you would even consider it. The best way to go is to use an ECM solution directly from the guy that made the ECM, IDS (Intelligent Design Solutions) talk to Tim Blomenburg. | ||
| Dannybuell |
there is a power commander in the classifieds... those piggy back controllers have the oxygen sensors disconnected. why have a flat map in a world where the weather is multidimensional? get the EBR, it uses the the oxygen sensors and adjusts to the weather. It may cost a bit more, love hurts sometimes. http://www.erikbuellracing.com/store/parts-accesso ries/fuel-injection.html | ||
| Willmrx |
I do not want one. I had never heard of this type of controller for our bikes. I was just wondering if anyone had used one. I have a EBR race ECM and a Barker exhaust and a K&N air filter. I was looking for some info first hand to help out my friend who just got one for his Yamaha. | ||
| Stevel |
Danny, Please note that the tunable EBR race ecm does not use the O2 sensors either. | ||
| Firemanjim |
So I want to know how they do "load based" when all they are connecting to is the injectors?? Sorry, but the best way is still getting your bike on a dyno and tuning it. | ||
| Dannybuell |
Stevel, how about the tuned ecm, like my barkers version? | ||
| Stevel |
Danny, Generally, this injection system uses pulse length to determine the amount of fuel to inject per engine cycle. The pulse width is controlled by a binary value contained within a data cell. These cells are arranged in a data array addressed by RPM on one axis and throttle position on the other axis. Please also note that this ECM is not one ECM, but two. You have one for the front cylinder and another for the rear cylinder. Each with its own sensors and data maps. In closed loop mode, the cell address is further modified by the feedback device, which is the oxygen sensor, barometric pressure sensor and intake air temperature, but primary feedback is the O2 sensor. There are two types of oxygen sensors, narrow and wide band. Production engines mostly use the narrow band type, as the Buell does. This type of O2 sensor switches between ground and voltage, rich or lean centering around stoichiometry, the perfect fuel air mixture. Where when perfect, there exists exactly enough air to completely combust the injected fuel leaving no unconsumed O2 or fuel. This O2 sensor has only two outputs, rich or lean, so when operating correctly, it will continually switch on and off. This address modification value can be monitored on the instrument panel. Here is the issue, when operating in closed loop mode, the end mixture will always be stoichiometric, because of the O2 sensor switch point. Fuel map changes will have little effect. Fuel map changes will have the most effect when operating in Open Mode. Open Mode is used when the engine is cold or the engine is either running outside the closed loop speed and load range. Closed loop mode is useful when riding in different weather conditions and different altitudes. Now, I do not know what the transition points are nor do I know if EBR changes these when they produce custom tunes nor do I know how to view these points of transition. In general, closed loop operations should exist only during normal cruise conditions and are worthwhile when riding on the street. Cold engine mixture is normally achieved by raising the fuel feed pressure from the fuel pump. The fuel pressure is regulated by the speed of the pump. The pump motor is driven by PWM (Pulse Width Modulation)controlled by the ECM. The full race ECM with the included PC application allows the user to modify all kinds of data not just the fuel and spark maps, but things like ignition coil dwell angles and other obscure items, but it does NOT use closed loop operation and in that light, the O2 sensors are not used. There is no real need to use closed loop operation, as there should be individual tunes for every race track and race condition perfected during practice sessions. It is possible to use the race ECM on the street, but it is of course illegal, but it will function just as a carburetor does in open loop mode only. However, if you wish to run F/A mixtures outside of stoichiometric for performance reasons, you cannot in closed loop mode because the O2 sensors won't allow it. If you really want to know what is going on in order to perfect a tune, you have to install wideband O2 sensors that output an analog voltage indicating F/A ratios as rich as 10 to 1 and as high as 18 to 1. These should be used with a data logger. These data loggers will capture not only A/F ratios but engine speed and throttle positions at a minimum, allowing the user to display these after a test ride for analysis. These test sessions are mostly done on a rolling road dyno, but that is really a best guess as well. The best test session is an actual ride using the bike in real world conditions. EBR had a dyno and ran a test bike using various exhaust and air filters in their facility. These are also best guess tunes, as the test was not run on your bike or in your use conditions. So are they better than what you have? Probably, but to really get it right, you need to test YOUR machine and adjust accordingly. I hope this brief explanation helps, but if you really want to know more there are lots of info on the web. (Message edited by steve-l on July 05, 2016) | ||
| D_adams |
https://www.youtube.com/watch?v=cuD7KtoR-B8 Want to know how it runs? The video above shows you one way of doing it. Not counting tuning, starting cost was $1300 plus install time. Best would be a 4 or 5 gas analyzer with EGT's, but my budget is somewhat limited. | ||
| Firemanjim |
We have widebands and data log all the race bikes, need to know if it goes lean real quick with a turbo motor or something melts! Lots of decent wideband setups out there nowadays for alot less than Deans 1300.00 setup. No dyno close by, install a wideband and log so you can tune your bike to your needs. |
