The best gas horsepower to weight ratio of any stock Sea Ray

[garryowen]

4060@330hp for our weekender---------.08128

 

[JV II]

I just realized that you moved from a 29 to a 33. What is your average cruise speed on that boat and what is the top speed?

For comparision, at 4000 rpms, I am running around 25 knots with a light load and little wind. I am guessing that your boat withl I/O's would probably be running at 38 to 40 knots at that RPM.

I cruise between 3450 and 3600 RPM at 32-34 mph GPS. At 4000 RPM you are correct in your estimate. Top speed will hit 50 mph at WOT, burning almost 70 GPH near 4600 RPM. The engines make a sweet sound at that speed.

 

[JV II]

A HP to weight ratio is meaningless with the different variates of boats here....

Agreed, that's why I suggested by category. I also think HP is not a good factor to consider and perhaps torque would be better. The HP difference between my 5.0s and my 8.1s is not a world apart, but the torque is.

 

[26sxl]

My SR runs 56 to 60 (gps) load & water cond. All stock with 19p mirage's

 

[elreyos]

I'm just curious to know which stock boat by category in Sea Ray history has the best horsepower to weight ratio? Let's use the dry weight and horsepower reported by Sea Ray.

Let's start with twin engine cruisers:
I've got 750 HP in 15,400 pounds. That is a ratio of 0.04870
Anything out there better than that?

That beats my pair @.03473. 660x2/38000lbs. I think the 510 was available with bigger engines than the 3196, but i don't know what the HP ratings were. Maybe Frank will way in.

 

[elreyos]

I vote we change the measure to Maximum Torque to weight.

 

[JV II]

I vote we change the measure to Maximum Torque to weight.

Sea Ray lists torque in Kw. What is the conversion to ft/lbs?

 

[elreyos]

I'm not sure you can convert KW to lb/ft? Lets see where did put that engineering pocket book? I'll get back to you on that one.

 

[JV II]

I seem to recall my 8.1s putting out at least 500 ft/lbs, but I can't find it online now. Torque to weight would be an interesting comparison because the low HP diesel boats would fare well in this more relevant comparison. The low displacement high HP engines would have their weakness revealed.

 

[chumbley]

I'm not sure you can convert KW to lb/ft? Lets see where did put that engineering pocket book? I'll get back to you on that one.

I think KW would convert to HP, not torque.