I have a pyro and boost gauge waiting for install, so I'm flying blind... and not advocating much adjustment without gauges. YMMV
What I strove for years ago, was to try and flatten out the combustion pressure, my main method being to extend injection period by lowering break pressures. Down to 125bar for instance. Was I successful? Well I don't know, but my car beats official handbook economies. This was at 0.57, 46mpg [imp] round town and 62+mpg on a flat run. So despite low value timing it clearly doesn't all go out of the exhaust.
Take it with a grain of salt. Giving a 'timing setting' in mm of plunger lift with non-stock injectors or non-spec pop pressures is very misleading. I believe that Mark has significantly lowered injector breaking pressure and so the actual timing of the start of injection or more importantly start of combustion is very likely similar to spec or more importantly completely unknown.
...BTW your Bieber avatar is awesome.-Malone
Quote from: libbydiesel on November 27, 2013, 07:49:53 pmTake it with a grain of salt. Giving a 'timing setting' in mm of plunger lift with non-stock injectors or non-spec pop pressures is very misleading. I believe that Mark has significantly lowered injector breaking pressure and so the actual timing of the start of injection or more importantly start of combustion is very likely similar to spec or more importantly completely unknown.I would guess this is accurate. I would think any gains in mpg would be because of the pump not having to work as hard to open the 155 turbo spec or whatever n/a spec is.