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+--- Thread: 3100 Open Engine HP Performance (/showthread.php?tid=7197)
3100 Open Engine HP Performance - Efreeland - 10-27-2020
I’m in the market for a 3100 Open. Likely a late 80’s thru 90’s. I’ve noticed a fairly wide range of horsepower in engine set ups. From 600 - 800ish. Was wondering if anyone can speak to performance difference. I’ve come across a diesel powered at 600hp but that really seems on the low side of power. I realize prop configuration will play a role. Any thoughts on this?
Thank you.
RE: 3100 Open Engine HP Performance - Sans Peur - 10-28-2020
You can never have to much HP.
That being said, a diesel creates its HP at much lower RPM's and will generate a ton more torque. This allows it to spin bigger props and can negate out the larger HP difference between them and a gas engine. Look at the Ford F350's the lower HP diesel can pull a ton of weight and it takes a much larger gas engine to do the same thing. That equates to boats as well.
I will be interested to hear what others are experiencing in this boat.
3100 Open Engine HP Performance - Misdirection - 10-28-2020
I have an '86 3600 with twin Crusader 454's (700 hp total). I have plenty of hp and never felt under powered.
I'm up on Lake Erie, usual trip is 10 to 20 miles off shore, troll for 6 hours, run back to port. Erie is a shallow lake and gets snotty at times.
Or sometimes we make a 5 hour run down the lake to the Islands.
If I were in salt water making off shore runs, I'd probably want diesel's.
But if you plan on fishing and trolling, it can be difficult to troll a smaller boat with diesels at a slow enough speed with out trolling valves.
Sent from my SM-A505U using Tapatalk
RE: 3100 Open Engine HP Performance - ardoski14 - 10-28-2020
I'm on my second year owning 1988 33' Open with 454 350 HP and feel it has more than enough power. Loaded down with 4 to 5 guys, fishing gear and a full tank of gas it get s on plane with some trim tab. Attached is a performance sheet from Tiara on a newer 33' Open.
RE: 3100 Open Engine HP Performance - Efreeland - 10-28-2020
(10-28-2020, 06:11 AM)Sans Peur Wrote: You can never have to much HP.
That being said, a diesel creates its HP at much lower RPM's and will generate a ton more torque. This allows it to spin bigger props and can negate out the larger HP difference between them and a gas engine. Look at the Ford F350's the lower HP diesel can pull a ton of weight and it takes a much larger gas engine to do the same thing. That equates to boats as well.
I will be interested to hear what others are experiencing in this boat.
I agree we never complain about too much horsepower.
(10-28-2020, 11:28 AM)Misdirection Wrote: I have an '86 3600 with twin Crusader 454's (700 hp total). I have plenty of hp and never felt under powered.
I'm up on Lake Erie, usual trip is 10 to 20 miles off shore, troll for 6 hours, run back to port. Erie is a shallow lake and gets snotty at times.
Or sometimes we make a 5 hour run down the lake to the Islands.
If I were in salt water making off shore runs, I'd probably want diesel's.
But if you plan on fishing and trolling, it can be difficult to troll a smaller boat with diesels at a slow enough speed with out trolling valves.
Sent from my SM-A505U using Tapatalk
Thank you.
I would really like diesels. The older boats with higher engine hours worry me. The boat has 600hp with the diesels. I likely won’t fish much. It is for the wife and I to explore the Chesapeake on and do some overnights.
(10-28-2020, 12:33 PM)ardoski14 Wrote: I'm on my second year owning 1988 33' Open with 454 350 HP and feel it has more than enough power. Loaded down with 4 to 5 guys, fishing gear and a full tank of gas it get s on plane with some trim tab. Attached is a performance sheet from Tiara on a newer 33' Open.
Thank you that is good information.
You have a single engine in that? All the 31’s I’ve been looking at are twin screws.
RE: 3100 Open Engine HP Performance - ardoski14 - 10-29-2020
(10-28-2020, 03:55 PM)Efreeland Wrote:(10-28-2020, 06:11 AM)Sans Peur Wrote: You can never have to much HP.
That being said, a diesel creates its HP at much lower RPM's and will generate a ton more torque. This allows it to spin bigger props and can negate out the larger HP difference between them and a gas engine. Look at the Ford F350's the lower HP diesel can pull a ton of weight and it takes a much larger gas engine to do the same thing. That equates to boats as well.
I will be interested to hear what others are experiencing in this boat.
I agree we never complain about too much horsepower.
(10-28-2020, 11:28 AM)Misdirection Wrote: I have an '86 3600 with twin Crusader 454's (700 hp total). I have plenty of hp and never felt under powered.
I'm up on Lake Erie, usual trip is 10 to 20 miles off shore, troll for 6 hours, run back to port. Erie is a shallow lake and gets snotty at times.
Or sometimes we make a 5 hour run down the lake to the Islands.
If I were in salt water making off shore runs, I'd probably want diesel's.
But if you plan on fishing and trolling, it can be difficult to troll a smaller boat with diesels at a slow enough speed with out trolling valves.
Sent from my SM-A505U using Tapatalk
Thank you.
I would really like diesels. The older boats with higher engine hours worry me. The boat has 600hp with the diesels. I likely won’t fish much. It is for the wife and I to explore the Chesapeake on and do some overnights.
(10-28-2020, 12:33 PM)ardoski14 Wrote: I'm on my second year owning 1988 33' Open with 454 350 HP and feel it has more than enough power. Loaded down with 4 to 5 guys, fishing gear and a full tank of gas it get s on plane with some trim tab. Attached is a performance sheet from Tiara on a newer 33' Open.
Thank you that is good information.
You have a single engine in that? All the 31’s I’ve been looking at are twin screws.
no twins also with a generator.
RE: 3100 Open Engine HP Performance - reeltimebrad - 11-03-2020
I've heard the small block 350's are a little underpowered and to stick with the 454's.
RE: 3100 Open Engine HP Performance - Pknappe - 11-10-2020
I have a 1998 3100 Open with twin Crusader 454 XLi engines. They have 900 hours and it tops out at 30 knots. Cruises nicely at 18-20 knots at around 2800-3000 rpm. Full fuel and water, three guys on board. Estimate fuel at around 0.9 MPG. If you want increased range, I would go for diesels. Otherwise I think this setup is fine.
RE: 3100 Open Engine HP Performance - Jon H - 11-22-2020
I had a 31 with 454's -350-. Very good performance but had to use bags to troll for walleye.