44 ft Endurance Diesel
01-02-2014, 05:07 PM
#151
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That's a great point, just may need to get some more air in there. You bring up a great point, how many engines rooms do you see the paint on the compressor side of the turbo and into the aftercooler turning brown on the little Cats & Cummins? The answer MANY just go on yachyworld and start looking at used boats like many of the smaller express style sportfisherman they lack enough air for cooling the room he's spot on! I'm guessing your intake air is into the 300's to turn that paint brown?
Aside from that you're running little Yanmar's that the Hp/cui already has them as "hi-performance" engine. You want to put more furl into them and get more power. This entire site is full of people telling others they are "stupid"(harsh for effect only) if when they add a bigger carb they have to change the stock exhaust, they change the intake, change the cam and you can't use those heads and on and on....
Aside from that you're running little Yanmar's that the Hp/cui already has them as "hi-performance" engine. You want to put more furl into them and get more power. This entire site is full of people telling others they are "stupid"(harsh for effect only) if when they add a bigger carb they have to change the stock exhaust, they change the intake, change the cam and you can't use those heads and on and on....
02-17-2014, 12:40 AM
#153
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02-18-2014, 01:07 AM
#157
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I am very happy with my FASS pump, but your setup is much much different than mine, is the screen shot you put up showing a fuel return temp of 160???? Is it still over 100 after going through the cooler?
Also I disagree completely about diesels, especially modern common rail, being designed to deal with some air in the system. The least bit of air can quickly cause permanent damage to injectors and pumps.
Also I disagree completely about diesels, especially modern common rail, being designed to deal with some air in the system. The least bit of air can quickly cause permanent damage to injectors and pumps.
That screenshot is from the factory temp sensor on the return line exiting pump and injectors, before the fuel cooler. I've never checked it after the cooler, but it's gotta be half that. My fuel cooler is in the first stage of the engine oil cooler, and that unit is so overkill sized, it will barley allow 12 quarts to reach 170F, no matter how hard/long you run. Part of the reason I've been bypassing water where I can.
On lift pumps, I can only say I've witnessed CP3 pumps and injectors fail with air removing lift pumps feeding them just as often as without. When you force feed those mechanical lifts with an electric, it bypasses a good portion of the fuel before reaching the CP3 pistons anyways. A lot of air in the fuel is not good on any diesel fuel system, but unlike my Ford which has dropped an injector about every time it's seen some air, the common rails I own have never shown any impact from air getting into the fuel lines. Just my personal experience, and I've had all my injectors and pump apart on the bench before... lol.
