Recently I installed a turbo on my 7.3 Super Duty and now it seems that all it wants to do is overheat. As instructed in the installation guide I turned the fuel delivery screw in 1/4 of a turn and it overheated. I turned the screw down a little and it seemed to be a little better but over a long haul it got hot. I have been playing with the injection timing and when I turn the IP counterclockwise it seems to run a little cooler but at the same time it makes it run like the was an RPM limiter on it. When I turn the IP clockwise I get gobbs of power but the engine gets hot twice as fast. Most of the time moving along with traffic which is about 70-75 MPH and the RPM is about 2900-3300 with the AC on it will overheat slowly and I'm thinking that its because the pyrometer is at approx. 900 deg. and the oil cooling might be insufficient because while the oil is into the turbo it drops right back into the top of the motor and that oil has to be extremely hot thus making the block and the coolant heat up to the extremest.
All that I'm looking for is some opinions or even some different ideas that I may have overlooked.
Thanks,
b2qared

 

what turbo did you put in and how much boost is it running? it may be that you are running extremely lean now. if you run lean then the temp goes up.

 

On a diesel, you also need to watch your egt's. High egts, caused by running rich, can damage your turbo. It sounds like you need a few guages to determine whats going on. I would invest in a pyro temp, boost and look around for a wide band o2. If this turbo is bigger or produces more boost, your cooling system may be insuffient. What other mods did you do? With an upgraded turbo, you will need an upgraded down pipe and exhaust to remove combustion gasses and relieve some heat.

 

Thank you for replies ReAX and arcticoffroadingfish. Ive been busy busy busy. As for your questions, here we go, I purchased and installed a Banks sidewinder kit, it comes with everything, 3 1/2 exhaust to muffler and then 4". Turbo boost goes to about 9 max. Oh yes and I have both boost and pyro guages.
Now since the time of my last post I took it upon myself to turn the fuel screw counterclockwise a little more. It did relieve the heat but at a cost to major HP's. Nevertheless it ran really good. Just a couple of weeks ago I had an injector go bad on me, first I saw it was leaking from where it threads into the block, so I tried to remove it with no luck. I sprayed it with the WD and worked it back and forth till i could get it out. When it was removed I leaned the it had come apart where the lower retainer holds the spring and pin etc. together. Got all the parts out and a day later removed the retainer body from the block. So, I purchased 8 new injectors for the hell of it ( last changed approx 100k ago) and now im back to square one again only this time it seems it has even less power than before. I have changed the dynamic timing just a bit and that seemed to help a little bit but as for the fuel delivery screw, currently it is set to where it was before I installed the turbo and Im having a problem accepting the fact that if I have to turn it down again then what have I actually gained??? I bought this kit to increase horsepower not headaches .