Quote:
Originally Posted by v8volvo
One thing I have imagined would be fun to attempt as a tuning and calibration technique sometime would be to find a way to install an injector needle lift sensor and crankshaft position sensor from a TDI engine, then get an ECU powered up and running on a bare-bones level and the OBD port wired in. With those pieces you would be able to read actual start-of-injection timing and RPM to see what the real world timing curve is, and adjust accordingly. This same method is often used by the guys doing M-TDI conversions to get their mechanical pumps dialed in to mimic what the electronic pumps achieve with computer control, though easier for them since they're starting with an engine that already has the sensors built in and ready to use. I have to imagine it would be more accurate than any other method...
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Would the OBD provide a way to connect a VAG-COM to produce a timing curve graph? Displayed on a laptop screen in real time?
Maybe a simpler but sufficient method would be using one of those Snap-on diesel timing kits that use a sonic wave sensor that clamps onto the injector hardline to signal what looks like a common timing light?