rondds
Well-Known Member
- Oct 3, 2006
- 8,859
- Boat Info
- 2001 380DA
- Engines
- Merc 8.1s (2008)...Hurth ZF 63 V-drives...WB 7.0 BCGD (2013), Garmin 8208 & 740 MFDs, GMR 24xHD dome
George
What was the RPM you ran to attain 28gph? That is surprisingly low but I guess the numbers don't lie. Someone once posted the dyno numbers for these motors. The only difference, from boat to boat, would be the speed you get at each RPM, based on weight, wind resistance, clean bottom, etc. At 28gph I'm chugging along at around 19mph with full fuel and ZERO wind and current. BUT, remember, idle and displacement speeds do create more favorable bottom line numbers, even if you were running at that speed only 5% of the time.
I consistenly average about 14gph for the season with all the no-wakes around here. But at cruising speed in real time, the floscans and totalizers do not lie and I'm up at 32gph.
What was the RPM you ran to attain 28gph? That is surprisingly low but I guess the numbers don't lie. Someone once posted the dyno numbers for these motors. The only difference, from boat to boat, would be the speed you get at each RPM, based on weight, wind resistance, clean bottom, etc. At 28gph I'm chugging along at around 19mph with full fuel and ZERO wind and current. BUT, remember, idle and displacement speeds do create more favorable bottom line numbers, even if you were running at that speed only 5% of the time.
I consistenly average about 14gph for the season with all the no-wakes around here. But at cruising speed in real time, the floscans and totalizers do not lie and I'm up at 32gph.
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