- Joined
- Aug 6, 2013
- Posts
- 6,333
- Likes
- 2,250
- Location
- Southwestern CT
- First Name
- Ben
- Boat Make
- 1998 36' Sabre Express CAT 3116TA's, 2015 ROS Scotia 16 Etec 50
So, as some of you may know, I have been looking for a 30 to 35 foot down Easter. The search inevitably leads to looking at boats that would be better with new power and the question of gas versus diesel comes up.
My question is, for a 300 to 350 hp diesel engine, where does it make them majority of its torque? At what RPM? i assume that it is around 2400 RPMs and not at the top of the power band Which is why diesel engines are generally used for boats and also why they are more efficient than gasoline engines cruising speeds. I think I remanufactured Cummins diesel would be the only engine I could afford to install in about and barely at that So if anyone knows where I can see horsepower/torque curves for these motors, I would appreciate some direction.
I have owned several gasoline engines and understand the technology much better (gas engines usually make their highest work and horsepower ratings at the top of their RPM range). What I am looking to do is take make a comparison between the horsepower and torque ratings of a Cummins diesel to a gasoline V-8 that I can buy for much less And see if it makes sense for this boat.
The boat I am currently looking at is a 30 Sisu which is, in my opinion, at the limit of where gas engines can be used With any degree of efficiency and longevity. I would love to discover that I could put a 383 stroker or a 454 in this boat and match it to the right transmission and prop and achieve 14 to 16 not cruising speeds with fuel consumption under 10 gallons per hour.
I think for a larger, heavier boat, that this analysis would probably not be worthwhile because gas engines simply don't make the torque they need to to push a bigger boat But for this book, it may prove a reasonable experiment.
Anyone have any experience with this? Also need a source for V8 gas power/Marine transmission combinations in Connecticut area.
My question is, for a 300 to 350 hp diesel engine, where does it make them majority of its torque? At what RPM? i assume that it is around 2400 RPMs and not at the top of the power band Which is why diesel engines are generally used for boats and also why they are more efficient than gasoline engines cruising speeds. I think I remanufactured Cummins diesel would be the only engine I could afford to install in about and barely at that So if anyone knows where I can see horsepower/torque curves for these motors, I would appreciate some direction.
I have owned several gasoline engines and understand the technology much better (gas engines usually make their highest work and horsepower ratings at the top of their RPM range). What I am looking to do is take make a comparison between the horsepower and torque ratings of a Cummins diesel to a gasoline V-8 that I can buy for much less And see if it makes sense for this boat.
The boat I am currently looking at is a 30 Sisu which is, in my opinion, at the limit of where gas engines can be used With any degree of efficiency and longevity. I would love to discover that I could put a 383 stroker or a 454 in this boat and match it to the right transmission and prop and achieve 14 to 16 not cruising speeds with fuel consumption under 10 gallons per hour.
I think for a larger, heavier boat, that this analysis would probably not be worthwhile because gas engines simply don't make the torque they need to to push a bigger boat But for this book, it may prove a reasonable experiment.
Anyone have any experience with this? Also need a source for V8 gas power/Marine transmission combinations in Connecticut area.