It is negligible especially as per your description.
I did not say SDI is as good as DI. I said They both run well and comparably.
I don't care to try to surpass 130, whats the point? I ride in Ontario there is lots of fuel avail. The last time a fuel runout happened in our group was last year, a 15' XRS 8 ETEC right around that 130 mile mark. The two 16' Polaris 800's both made it to fuel and I brought a can back for the Doo. The time before that it was in 2010 an 08' XP 800 X and My 02' XC700 both ran out about 2 miles apart on the way to Abitibi Canyon, that time was prob under 120 miles as we had filled them at the ESSO across from Thriftlodge in Cochrane. Good thing there was an IQ 600 that made it to the top to bring some fuel back for us.
I'm sure you could make 170 mile happen under the right circumstances but that would not be the norm.
They did go back to SDI as the 850 has a secondary set of injectors..