Cliff

I'm glad that My15M is still an attractive option for some. I was thinking it was sunk as a product. Guess I'll just need to add more features.

Sure you mean the O2 sensor mounted on the exhaust? Changing the inlet side is not going to affect it. Or do you mean air pressure sensor ( inside the ECU on the V11 ) but external on the Centauro. I think just letting it vent to atmosphere is ok.

Closed loop is optional. It works quite happily in open loop mode. Good gas sensors have response times measured in 1/10ths of seconds. My implementation is more sedate being adjustments of about 1% a few times a second. You still need to have a reasonable map in the background. The closed loop is more a trimming. The latest software allows 8 different A/F ratios to be specified and each point of the map can be set to one of these. You need a wideband sensor for this. So you can have leaner cruise sections of the map and richer sections for high throttle settings. Sections can be open loop if you want. My15M is approximately Standard ECU + PCIII + spark timing + diagnostic tool + closed loop.

So which Guzzis fall into that category? My 97 Sport Corsa?

I never use it. I don't start the bike till I'm on it and ready to roll. Why don't you put your gear on first.

Why can't you just richen it up yourself?

I don't hear much from Dave and his team. I've called him a few times to see how he's going. He's making progress and is happy with his unit. His main problem is getting enough fuel into the bike. He needs to up the fuel pressure or get larger injectors.

I've seen a few similarly priced analysers here and I'm reassured by the fact that some of them are using the same $200 sensor as I am on my bike. Seriously, if you'd like to have a look at one of my units I'd be happy to ship you a unit for evaluation. You'd just need to ship it back promptly if I require it. You won't notice a difference on the dyno. I don't claim to be able to produce more power than stock. That is not really a function of the ECU. The motor defines the power, the ECU just helps you achieve it.

Sorry I tried to ignore this but anyway. First off I'd like to state that there MAY be some bias in the above. Obviously Dynojet have a vested interest in ECUs not doing the right thing but enough of that I'd like to keep on topic. As an electronics engineer with control system experience my interest is from the technical view point. I don't have a interest in maintaining a belief of one system being superior to another and recognise that all systems are a balance of compromises and assumptions. In fact most the my units are run open loop. Firstly, yes it is important to make sure your o2 sensor is giving the correct readings. It also important that all other sensors ( air temp, air pressure etc ) are correct. In fact the our standard "open loop" systems are in fact "closed loop" in a way as they respond to these other sensors and modify their output. The new ECUs are really only adding an addition sensor to the mix. Secondly its a gross oversimplification to treat any 2 closed loop controllers as the same. "Closed Loop" can be done in so many ways. Technically a real closed loop ECU would have no map at all. All its outputs would be based purely on sensor inputs. I don't think there are any controllers of this type out there. The bulk of closed loop ECUs would be operate from a map just as an open loop controller. They would than perform small adjustments based on the sensors. The variation between the controllers would come from a number of areas 1) How quickly they respond to the sensors 2) How much compensation they apply to the map 3) When and under what conditions they decide to be open loop or closed loop 4) Whether they learn ( correct the map over time ) The list goes on but probably the most important N) what is the manufacturer's aim in putting in a closed loop controller? Is it to extract the optimal performance from an engine. Perhaps if its the Honda Race team. Its more likely an attempt to reduce the emissions to pass the EPA requirements. This is not optimal as far as the rider is concerned. This in itself will create an impression of closed loop controllers being less than open loop controllers. One question about the PC tuning on the dyno. Are the adjustments to the map derived from the gas sensor?

Baldini - Ideally you would send me a donor ECU. It doesn't have to be working. I take the case, connector and pressure sensor from the donor. These should be easier to find than the 16M as some aftermarket exhaust systems ship with an replacement ECU. I'll start to look around myself also and keep a few on hand. At the moment I have one available thanks to Carl. Carl has been able to get 3 quite cheaply on EBAY. Lex - Ideally you'd have a sensor and independant correction for each cyclinder. This is probable only feasible for racing. On the road its probably not worth the expense. The new bikes have it located on the crossover. The sensor needs to be hot to work. Most sensors now have a heater and can be located away from the headers.

There's a description on my site http://www.jefferies-au.org/My16M/Closed_Loop_Operation.html and my sensor mounting http://www.jefferies-au.org/ECU/O2sensoronbike005.jpg

There is one in Germany that is running. I'll ask him to add something to this thread. Its running closed loop with a cheap sensor at the moment with good results. HelicoptorJim has just received his and will be trying it out as soon as he can. This will be the first head to head with a power commander so it will be interesting to see how it goes. Not sure if Carl has any bike operational at the moment. Al if you're not far from Carl, I'm sure he'd be happy to let you try it on yours. Dyno is optional. The starting point is my sport map which works surprisely well. Usually only a matter of days before they're better than the stock just with a few manual map edits. I reckon adding a gas sensor and going closed loop is the way to go. There have been a few users who are not techically strong. They might stumble for the first couple of starting attempts but so far have been pleased with the results after an initial few days of experimentation.

Thats correct. If memory serves the air bleed on my sport are under the throttle body going vertically up.

I think CO should be 3-4% This could be an only at idle issue. If you get >35mpg its probably ok The air bleed screw can also adjust the idle CO.

And both the idle stops backed out all the way ?? I leave the RH idle stop out the way all the time and just use the LH side. I also don't use the fast idle. It and the RH side cause some distortion of the throttle setup. Normal riding only supports it from the LH side

Not sure if there is a difference as my 97 Sport Corsa (16M) , my 95 Cali (P8) and a late model ( 15M equipped EV ) all seem to have very similar settings. I think the main confusion arises because there are two ways the TPS values are quoted. One way is the T PS value at idle. This is the lazy way as it does not involve doing anything on the bike at all other than measure the value. The TPS usually gives about 1/2V ( 500mv ). The factory calibration involves removing throttle linkages and backing out idle stop screws or what ever such that the butterfly valve is completely closed off in the throttle body. This is the factory calibration and comes out around 150mv. I agree with Carl, put it back where it was.

The TPS/throttle is the primary mixture control. It is quite sensitive and has a big impact one your bike. Too lean the bike a little rather than going thru a proper calibration it might be easier to note the current voltage and WITHOUT changing anything else on the bike adjusting the TPS to reduce the voltage by 5mv. If thats no good restore the setting or do a proper calibration.

Number of things effect the mixture 1) TPS setting/airbleed - are these set correctly? 2) Altitude - how high are you. Perhaps you're higher than the normal compensation allows for. 3) Oil temp, on the open road the bikes are over cooled. This might cause some residual choking. You can probably fake this sensor with a resistor.

And Juha gets snowed in for six months also

Thats exactly what they found here. http://morini.com.au/phpBB2/viewtopic.php?t=1114

I don't see much value in this unit. Am I missing something or is this thing just giving some graphs based on acceleration. You could always datalog M15M to get this sort of data for analysis. I'd suggest getting a good wideband O2 sensor instead and running My15M closed loop.

The most important part of a dyno - gas analysis is missing. Makes it a rather expensive accelerometer.

No I've not looked into it. It probably uses a deliberately encrypted protocol to stop anyone who hasn't bought their simple software. Its rather strange that an ECU that can be flash upgraded is not because hardly anybody has the software.

Carl and JRT are correct. I replace the ECU electorincs and then you can adjust any part of the map. Most here just put a power commander on Is there a problem with your bike?

Or he could be referring to me. I have designed a complete replacement for the ECU. You can find out more from the link in my signature. The My15M is still quite new. The first one only hit the road in Germany this last week. Carl Allison also has one.