Viking 53' Convertible

Capt J · Aug 13, 2021

motoryachtlover said: ↑

Good deal on the increase in speed. I did not get those results when I stripped my bottom paint. I have been told that the 820s seem to run better in the 2000 - 2100 rpm range (if propped conservatively). My boat does seem to run better in the 2050 range. The pyro temps stay the same and it seems to not struggle as much getting over the backs of the waves in a following sea. If your turbos have not been blueprinted you would likely get some more performance improvement. I did. Less black smoke and stronger hole shoot. Don’t recall any significant increase in speed.
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They do. MAN's really should see 2350 rpms with full fuel/water WOT. They rely more on RPM/BOOST/HP to make power versus brute torque like some other motors and prefer to be cruised at a higher rpm.

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Viking 53' Convertible

Capt J Senior Member