Any mods for power enhancement of the detriot 60 series engine? Right now its at 425HP, not sure about torque, but its running with a 3 axle 1992 Vovlo single cab semi truck. Thanks for the help guys.

 

They made fire truck versions of the engine up to 550 iirc. They used a diffrent cam, computer, injectors, and I think turbo.

I have heard that you can drill out the fuel restrictor to trick the computer into injecting a littlr more fuel.
Also I have seen people switch the intake air temp sensor and fuel temp sensor to make the computer think you have really hot fuel and cold air. Be careful with this mod as it can cause detination. (computer thinks cold air = more timing but if the air is actually hot = detination)

Remeber that a ddec 4 computer remebers everything that you do. Example you driver for a company do something for added power and down the line the truck goes in for unrelated work. If the tech hooks up the prolink he will see your dirty work as an inactive code. These codes many times do not even turn on the check engine light. So you don't even know they are there.

To get any real gains like our 24v you are going to have to find someone who whould be willing to play with the computer. Try http://www.pittsburghpower.com/ they deal mainly in cummins but may be able to help.



Oh and the high horse units I saw grew a lot of blowby in a lot fewer miles than the lower output models. The key to that problem is CHANGE THE OIL REGUALRLY!! I can't tell you how many 60 series I saw that needed rebuilt at 450,000 area because of poor mantinance.
Then see some that have very little blow by with over a million on the clock.
It shows up on the ring wear, cam wear (many times the grafite coating is totally worn off) injector failaure and bearings blown threw to copper.

You also need to keep the colant aditive level up unless you want to by some new injector tubes and cylinder liniers.

Anyway this turned out to be a much longer post than I anticipated but I hope I shined some light on the subject.

 

boost the lift pump pressure by restricting the return to the tank will help in the power a bit... but the fuel pressure sensor will see it is high... and there are probably "performance" injectors avalable if you search.. something that has been extruded honed out a bit larger

1992 probably won't be DDEC 4, most likely DDEC 2 or 3...

 

Go find a GM Marine guy. The Seris 60 for marine application is 740hp. Put two of them in a 65ft Army Corps boat called the Florida out of Jacksonville. Replaced the 12V71TI's that were there.

Must be the computert that makes the HP.

Dave

 

You need to find a shop that has the computer link and they can turn it up some, I think yours can go to 475 or so with just a reburn. Anything more than that you need to change injectors and turbo.

 

So basically the engine is pretty smart and is highly computerized, if I would like to modify it to attain more power then the key would be to altering the computer around. I dont have to worry about any tech scolding me, we own the truck and for the past 6 months has only been used to move trailers around. My father bought a 96 volvo but with an integrated sleeper, pretty nice for the money but it has 800,000 miles and still looks mint.

Straight piping the exhaust? WOuld that help any? Yesterday I thought I heard an explosion which sounded like it was a mile away, but then in actuality, a yellow peterbilt with straight pipes. Driver jaked the truck to a stop and sounded insane

 

I didn't see that part. So yeah its probably a ddec 2 or 3 that don't keep up with what you do quite as much.

 

We had problems with the marine ecms in the fact that they won't droop as much as the truck computers, and under high throttle if the wheels (props) are a little too big the engines will burn up as the computer will try to raise the rpm with full fuel when it should just droop. Throttle wants full 2800 wheels won't turn faster than 2650 computer stays at full fuel vs just letting it be a little low. Egts go way up and a few hours later meltdown.

On the other had we swung one in a tug out of a dump truck to replace the starbord 12v71.
We rigged the after cooler to the engine room blower above the engine and used the ddec 3 computer out of the truck.
That set up ran better than any of the marine 60 series sets we had doneup to that time. It took up half the space of the 12v71 would spin the its wheel 350 rpms faster. 5 months later we put in another one to replace the lone 12v71 left with the same setup. With the wheels repitched the tug could make 1.5 knots faster. (no barges)

The marine versions may be better now with ddec 4 as I havn't worked in that field in about a year but we couldn't recomend a 60 series in a tug at that time.

 

at school, we have a 60 series in a bench and the exhaust on it is a 16" length of pipe off the turbo... sounds good [then again, none of the engines in the engine lab have muff's on them - the 6v71 sounds awsome with just manifolds]