Well, in the end I didn't bother trying the EFI again tonight. I am going to wait until I get my new smaller capacity injectors.
My current injector(s) are the Weber PICO IWP043 330CC units. Staged to fire one at low rpm, two in parallel at medium rpm and all three together at full load.
As it turns out, one by itself is to big for starting and running at light load off the throttle. At this point the injection on time is less than the 2ms minimum for accurate fuel control.
I am going to try a set of these. They are half the capacity and this will effectively double the injection on time at start up and slow running and that will make it much easier to tune the injection map.
The good thing is, all the injectors don't have to be the same size, you can mix and match to get the overall sizing that works best.
Ok the word from Ecotrons is .....
Hi,
It supports on-the-fly function.
The variables which labeled “RAM_” support on-the-fly function, so you can tune the data while engine is running.
Step1: connect to ECU while engine is running.
Step2: tune the cell value of (RAM_MAP_LdTp_Tps_N), double click the cell and input the value, then press”Enter”, you can see a message on the lower left corner of ProCAL “ Write successfully”
Note: when you tune the data on-the-fly, please “Stop Measuring”. Otherwise it will not take effort.
And if the ECU power off, the data will be lost, so you need save the data and burn to ECU after you think the data is OK.
Ecotrons tech support BL
When a fuel injector on a four stroke fires, a mist of fuel forms behind the inlet valve. And when the inlet valve opens that cloud of fuel is blown into the cylinder.
Four stroke EFI components are readily available and on a two stroke people (and I was one of them) often try to mimic a four stroke by fuel injecting into the two strokes inlet but I have since learned that to truly mimic the action of the fuel cloud behind the four strokes inlet valve one has to inject into the transfer port of a two stroke and that the end point of the injection pulse needs to be timed to finish as the transfer port closes.
It all makes sense when you think about it for a bit. If the start of the injection pulse into the transfer port is a little ahead of the transfer port opening (or open) then that effectivly mimicks the action of injecting behind the four strokes inlet valve.
on a two stroke at 12,000 rpm you have less than 5ms and 2 of those are used up getting the injector open.
If you follow the links below you will find four posts with dyno graphs and video of two successful 2T two stroke fuel injected bikes.
Pg 91 in the manual. I knew I'd seen it somewhere.
It gets a bit more complicated. There the 2 tables that have values, one for MAP vs RPM and one for TPS vs RPM. How much weight is given to each is dependant on RPM and a value in another table. See the manual below and the screen shot of my default table. Easy to get lost I think. Note that the manual refers to the VE table. Values in here affect the injector pulsewidth in conjunction with the MAP table and other sensors such as inlet air temp.
Interesting rereading the tuning manual how much more relevant some settings become with a little knowledge
Bit hard to see in the photo. If you are changing the TPS table, or any other that starts with "RAM" any changes are made in real time to the values in the RAM on the ECU. You would want to save them at the end of the session and I've been doing that by simply disconnecting and reconnecting and burning to the ECU when prompted.
One thing I have found useful is to change the scales on the gauges. Right click in any gauge and enter new values for the min & max of the scale. Makes it a bit easier to see what's going on.
Thanks ... my map does say "RAM" but there is no obvious two way indication, I will have to pay more attention to it next time.
Pg 96 in the tuning guide
Advanced calibrations setup with two injectors
FUELPW1 active and the oscilloscope shows output at injector 1
FUELPW2 active but the oscilloscope shows no output at injector 2
I have just tried a really old version of the ProCal software and calibration files, they worked, so its some sort of software glitch in the newer version of software or advanced calibration file they sent me.
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