A little crazy?
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
I had moved my helm forward 18 inches, which shrunk the cabin the same amount. I was able to get an additional 130 gallons of fuel onboard. Now I hold 280 gallons total. I still have some fit and finish to do, but over all it was worth it in my mind. We travel to a National Park that is 70 miles dock to dock, 60 miles of open Lake Superior. The gas out there was $8.62 a gallon last summer. So now I can make a round trip with plenty of reserves and not have to buy fuel over there.
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
The last few pics were of my Garmin chartplotters showing the speed of 31mph at 3,000 rpm. Getting a 1.3 mpg with a pair of 454 Chevy's.
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
I also just picked up a set of used Bravo 3 duoprop outdrives that I will install this coming season. After I tear them apart to make sure the internals are good. This should also improve my efficiency.
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
Don't mind the big hole in top of the dash, it was a temp spot to mount the chartplotter while doing the water test. It has been covered.
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
I'm thinking something happened to the amount of views on this thread. It was at 10,000 a couple months ago, now it says 2.4 million. Maybe the google algorithm directs them here from the thread title?
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
Re: A little crazy?
I am very curious what kind of performance increase these give you.
I have driven many boats with them and know "seat of the pants dyno" the difference is massive.
I have never seen a conversion with before and after specs to see what it actually does.
HoHum 1969 Marinette 28 Sportsman dive boat with twin 250hp outboards
Andianna 1977 Marinette 32 Express
Scuba diving charters on the Great Lakes
www.belowthegrade.com
Andianna 1977 Marinette 32 Express
Scuba diving charters on the Great Lakes
www.belowthegrade.com
-
- Royal Aluminum Star
- Posts: 266
- Joined: Mon Jan 19, 2015 11:07 pm
- Location: Lake Superior-Michigan's U.P.
Re: A little crazy?
Tracy, I also am very curious. On a 25 Bayliner flybridge with a single 454, my father switched out a bravo 2 for a 3 about 15 years ago. It gained about 3 to 5 mph at 3200 cruise. Pessimistically I think it will run about 32 to 33 mph at my cruise rpm of 3,000. Optimistically, I will be tickled if it will run about 35 mph. The drives came with 24 pitch props, which may or may not work, I won't know until my first water test. I have a single set of 26 pitch, so I would have to get one more set if the 24's don't work. I pulled the prop shafts out and looked at the gears and bearings and they looked good, so hopefully I can get a few years out of them.
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior