Stephanie Gahler I'm using an OPTO22 snap pac system. I have a Futek load cell powered with a Kikusui power supply. I was using a bridge amplifier IC mounted with my other electronics away from the cell. It was very noisy. It may work better if mounted directly to the load cell. Now I just have a shielded cable from the load cell going straight into a Thermocouple/millivolt Snap (Snap-AITM) module. It's very quiet and stable after the load cell warms up.
Joshua Gomez I'm dyno testing parts in my backyard until I can afford a building in an industrial area. Not disturbing the neighbors while doing R&D is critical. The muffler system on my dyno is basically three mufflers. The first is an 80 gallon three chamber reactive with two 6" inlets and one 8" out. This goes into a 40 gallon 8" in and out glass pack. This vents into my stack which is 2'X4'X12' and lined with 6" open face fiberglass. The first muffler cancels out frequencies below 533 Hz, the others take care of high frequencies. It has vents at the inlet to eliminate back pressure. The only time I've noticed it venting is when I rev a motor. During pulls there is a slowly increasing column of exhaust flow so it doesn't vent. As far as the ADD, I've never been tested but have a tendency to get
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good video mate! I love it!
What type of data aqustion system are you using for the load cell and speed sensor?
Do you use an amplifier for the load cell?
Stephanie Gahler I'm using an OPTO22 snap pac system. I have a Futek load cell powered with a Kikusui power supply. I was using a bridge amplifier IC mounted with my other electronics away from the cell. It was very noisy. It may work better if mounted directly to the load cell. Now I just have a shielded cable from the load cell going straight into a Thermocouple/millivolt Snap (Snap-AITM) module. It's very quiet and stable after the load cell warms up.
Any of this stuff done ? you got soo many projects , A.D.D to the MAX , and why would you dyno an engine with huge restrictions in the exhaust ?
Joshua Gomez I'm dyno testing parts in my backyard until I can afford a building in an industrial area. Not disturbing the neighbors while doing R&D is critical. The muffler system on my dyno is basically three mufflers. The first is an 80 gallon three chamber reactive with two 6" inlets and one 8" out. This goes into a 40 gallon 8" in and out glass pack. This vents into my stack which is 2'X4'X12' and lined with 6" open face fiberglass. The first muffler cancels out frequencies below 533 Hz, the others take care of high frequencies. It has vents at the inlet to eliminate back pressure. The only time I've noticed it venting is when I rev a motor. During pulls there is a slowly increasing column of exhaust flow so it doesn't vent. As far as the ADD, I've never been tested but have a tendency to get