Running Saws for Therapy
- Local time
- 8:01 AM
- User ID
- Jan 6, 2016
- Reaction score
- Lancaster, MA
We know there is communication going across the power source for the carb solenoid.
At current the only way we see (or the quickest way) is to get the mdg1 diag cable but it can only be gotten for about $600 or $700.
I am working on locating the parts to build out a non-running 261 MT and driving it from an electric motor so as to get a scope on it.
I am also working on a new method of removing the Protection with a Dremel mounted as a drill press and removing layers of a thousands at a time while the coil is in a bed of water.
I have discovered that you can see components below the protection (when very thin) under water.
As for your Dyno, I love what you all are doing but if I can make a recommendation.
Add a thermocouple for temp and place if inside the exhaust chamber.
While a temp reading of the head is ok, one at the exhaust will allow you to tune the motor to temperature.
What a lot of people to do realize is that turning to exhaust temp will actually allow you to find the best / lean WOT setting just before the motor starts to Detonate.
The temp reading is just for tuning right? i.e. use the temperature to lean it for best power w/o cooking things?
We were tuning the saws on the dyno using the RPM reading w/o the brake applied, but the extra load the disc has on it made it so when the saw came off the dyno the tune would be different when just tuning by ear against WOT.
I'm curious what the diag cable does -- convert their comm (dallas 1 wire?) to USB serial? It would be nice if a cable could be made instead of spending the dollars for the Stihl one.
If a scope can determine bits from the data that would be a huge step. Here at the office we have one that can decode most protocols to show hex -- that would be nice to help figure out how bits are encoded on the data / power wire.