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10-13-2020 08:06 PM #11
Re: Looking for Max rated Torque output
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10-14-2020 12:48 AM #14
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10-14-2020 09:03 AM #15Senior Member
- Join Date
- Apr 2008
- Posts
- 494
Re: Looking for Max rated Torque output
Covington bumped them up.
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Re: Looking for Max rated Torque output
(Horsepower x 5252) ÷ rpm = torque.. kinda
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11-16-2020 04:26 PM #18Senior Member
- Join Date
- Jun 2007
- Posts
- 4,974
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Re: Looking for Max rated Torque output
Torque is king. It's what has the ability to move big heavy boats. My 34C is underpowered ("at the brochure") with only 270HP engines. But since they make big HP at such low RPM's they make 735 foot pounds of torque, much more that the 330HP 454's before them. Top end is similar but these can jump the boat on plane quicker and cruise at a higher speed burning less fuel.
A deficiency on the DD's in this arena is kind of similar to the high RPM engines like Yanmars. While they make nice HP numbers they can struggle to get on plane where RPM's come up and they really breathe. I have 650HP 8-92's on the 46 but while they make big numbers they struggle until turbo's spin up. Therefore while the HP and torque is there it only exists after the engine develops power. I had 20 people on the boat over the weekend for an event and it planed off like an underpowered single engine. But once turbos spooled up it took off like a rocket (may be a bit of an exaggeration). Cummins is the king of torque in my opinion. Big HP way down in the RPM range.1966 34c
1982 46 HP
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11-16-2020 06:06 PM #20