Yup, it's gonna be interesting to see
what speed you get out of it. I agree
the 26 B1 is overkill and that it will take
over 550 HP to turn it to 5200 RPM; I was
figuring the boat weight at 4,700 Lbs;
my 25 Outlaw is 4,750 w/ full fuel.
I may be repeating myself but my 502
Mag EFI w/ CMI's and Vortec billet flame
arrestor turns the NON labbed (stock)
26 B1 to 4,700 and GPS'd 69.7 the other
day.

I'd love to turn 5,500 RPM but the general
concensus is for long engine life keep the
RPM's below that, so I figured I'd stick to
the stock ECM's 5,150 and shoot for
making enough HP to turn the 26 to 5,100 which will be around 74 MPH.
--
There will always be someone faster,
but I wanna be the fastest
normally
aspirated 25 Outlaw! And turn my
own wrenches as well!

*edit*
Well, now that I think about it, 5,500
is not that high if the right parts are
used. The Mag engines have the right
parts. Mercruiser probably runs them
at lower RPM and lower compression
to save on unnecessary warranty
expense.
I agee, more compression and more
RPM!

*end edit*