Another "what do I look for"

Diverted Income · Post by **Diverted Income** » Wed Dec 12, 2012 7:34 pm

What is a good guesstimate for fuel consumption w/ 305-230HP???
1 MPG ???

ready123 · Post by **ready123** » Wed Dec 12, 2012 8:32 pm

Gallons per hour is normal spec for boats.
Nearer 0.81 mpg at slow cruise in my experience....

Some specs from original Trojan docs:
Cruise 15-22 mph (2500 rpm - 3000 rpm)
Top speed 32.3 mph (4000 rpm)
2500 rpm ..... 15.6 gph equiv to .96 mpg
3000 rpm ..... 22.5 gph equiv to .98 mpg
4000 rpm ..... 40.5 gph equiv to .79 mpg

Diverted Income · Post by **Diverted Income** » Fri Dec 14, 2012 10:08 am

More questions! (82 F-32 w/Chevy 305)
Would this setup have counter rotating engines or would the drives be counter rotating ? Have initial report from surveyor (phone). No surprises yet. It does need help though...

Commissionpoint · Post by **Commissionpoint** » Fri Dec 14, 2012 10:56 am

Engines will be counter rotating. Those are 12 bolt intake 2 piece rear main like mine. They're pretty decent in the F-32 despite the 305 Chev not being one of my favorite engines. I'll probably go to a set of 5.7's when and if I waer the old 305's out. Its not like I want to replace them, but with over 130 hrs last season its not like I am avoiding it either. It would be nice to get them up over 2000 hrs before I have to ditch them, but no knowing too much about thier service history may make that a pipe dream. They are at about 1640 now, and I know the last 650 hrs or so are well maintained hours, but before that is anyones guess.

I did jump on the one I have because it had GM's and not Chrys blocks though. I'm pretty sure my days of owning Chrysler blocks are over unless that Marlin I have been looking for comes along.

Diverted Income · Post by **Diverted Income** » Fri Dec 14, 2012 11:06 am

These small blocks are pushing 1600 hrs also with unknown history.

Our other boat has a built 502 Ford dyno'ed at 529 hp in an 18' boat. This will be all new to us if the deal follows through!

RWS · Post by **RWS** » Fri Dec 14, 2012 12:43 pm

it is very important to clarify the numbers

MPG

or

NMPG ?

===========================

RWS

Diverted Income · Post by **Diverted Income** » Fri Dec 14, 2012 12:45 pm

10-4. I tend to think in terms of MPG. Great reading on this forum by the way.