I came across a good deal on this OTC exhaust back pressure gauge and decided to pick it up and see how my 034 single 3.5″ exhaust setup performs.
Results to be reported soon.
Gauge Test Run
All of the gauges that I can install have been installed and wired up. I changed out fuel filters and needed to refill the gas tank so I took some logs on the way to the station to see how the readings would look when graphed.
Turbo Temp Gauges Wired
Today I wired up an additional two gauges, the temperature sensors feeding into these gauges will take readings going into and out of the turbochargers.
I also swapped the labels for the Fuel Pressure and AFR readouts.
For the exhaust pressure I am using a custom spec’d pressure sensor from Dwyer Instruments. I’m not confident in some of the inexpensive pressure sensors I have used in the past so I decided to go with a company that has a long history of making gauges and sensors.
This particular sensor will read from 0-100 psi gauge pressure with 0.25% accuracy. It has a 0-10V output which will work well with the Dataq datalogger that can read a 0-10V input.
With a 1/8″NPT to -4AN adapter I’m just about set to begin recording exhaust pressure with this sensor rig:
