Sea Trial: Bertram 31 Patriot with Twin Cummins QSB 5.9 380HP 

Thanks!

Thanks! It was a really fun project!

The diesels will kill it in economy. Even at wot but expesially part throttle.

What size exhaust 5 or 6 in

@@javiermugarra5064 6

You do not want to install a 12 valve they are sluggish although good fuel mileage with the right delivery valves and turbo set up. A common rail is much more tunable and much more horsepower also good fuel mileage

MPH is a valid measurement of speed, sure its not conventional but we were using a phone app that displayed MPH, assuming most of you know the difference. As for expecting more speed. Most boat builders tend to over prop their boats which will gain a few MPH on the top end at the cost of long term overall performance. As the boat gains weight/equipment, the bottom becomes fouled, engines age, etc, having a more conservative prop will ensure good performance in the long run and is easier on the engines and running gear.

Heck, I thought knots is the correct speed measurement for boats, period, who care what model it is !

Nobody likes a know-it-all Andrew

@@scubasteve7303 hardly a know it all… got that from the net but have been around boats all my life and I’m a traditionalist who doesn’t like things being changed for no good reason. Ships don’t use mph km/h… anyway I still love the US but don’t understand why so many turn signals on the cars there are red!!! It is dangerous and illogical especially considering you have so many of the newer cars which have amber turn signals. Anyway. Loved all my time in the US everyone is super polite. Regards from down under

No we did a few mods to the interior, but not much. The hull is pretty stock.

Sounds reasonable. I would definitely check for myself before making a purchase.

A little optimistic but it is possible.

A friend had a 32' aluminium modified planing hull (full keel), installed Iveco 400HP. New propeller put him at 24 knots (light) cruise. Engine setting at Round 350HP.

Definitely not for sale. If your curious you could look for similar boats online to get a feel for the used market value.

We've used several different phones in our videos, not sure exactly which app. Sorry.

That's awesome. Outboards certainly have some good traits. Power to weight is a definite strength. For high speed boats they are a good option.

They have a nice fly bridge. Some people much prefer to pilot their boat from up top. This is a more extreme case of that. Everyone has their own idea of the perfect boat. How boring would it be if they were all the same? At the time of this video the planned enclosure for the top was not completed.

Don’t know much about the 31 Bertram I see

Live well is awkward, without a doubt. Depends if they will be trolling or bottom fishing, etc.

I think you might be thinking in terms of Gasoline engines. These diesels are heavy and this is a pretty deep V hull.

I would ask this... Do you really want to burn that kind of fuel? to make 300HP you'll be burning 15 gal per hour. How often are you really running WOT and wishing you had just a little more top end?

The Motors are going in my 31 Bertram. I’d like at least a 26 knot cruise. I just don’t know if I’d achieve that with 220 hp?

I also tried to join your website but was having issues

It is possible to get more ponies, but its not cheap or simple. Just like all engines more ponies is basically More fuel, More Air and More cooling, More fuel = adjusting, possibly replacing the injection pump plus all new injectors, More Air = probably new aftercooler and larger turbo, ... More cooling = possible new raw water pump and other plumbing etc.. Probably well over 10K per motor, better off selling those and Buying some Recon's

Email corey@sbmar.com if you continue to have issues creating an account.

It would go real fast!

@@SeaboardMarineIncVideos that would seem like the way of the future.

People are doing twin 300's with the 31's and reporting 50+

Outboards are the most practical resto track for the 31, IMHO.

Check out our website. A great place to start is our forum its totally free!!! Sbmar.com/community

You definitely don’t know what this boat is...

They leak.

That's the beauty of custom, when you build your boat, you can keep the glass if you like it.

Velocity can be measured lots of ways...Next time maybe will do Kilometers per hour. Or feet per minute, which actually has some nautical engineering legitimacy when measuring prop slip. 😊

This was one of our first videos. It took a while for these guys to get used to me shoving a camera in their face! Haha