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don't have a dyno but I would guess about 75 hp

Well I finally got a chance to rebuild the fan clutch assembly and it was not as bad as I had thought. The M920( I assume the 916 is the same, the 915's I have seen have a normally closed clutch so a different rebuild kit) has a EVANS FC200017 Fan clutch, I have confirmed this with other...

full turns :) still minimal smoke, excellent increase in power.

The thread is relative to the NTC400 not the NHC250 so stock refers to the 400hp cummins. Fuel and boost are directly related, the more fuel you put in the more boost the truck builds until it either maxes out the turbo's flow and most likely the egt's before that. I have no idea what it will...

the jake brake

from what I have gathered 14's are the most common in the stock application, you can go down 5 from stock and be pretty safe. The fuel adjustment through the shaft is easily adjustable and free, if you turn it up too much and are getting excessive smoke just use a small screw driver and turn it...

that's interesting since air does not pass through the pump, and as far as I know it had nothing do do with the amount of air that goes into the cylinders, I always thought that was what the turbo was for.... What is also interesting is that pump mechanic at my local Cummins northwest repair...

Yeah, mine is also painted black, it all looks the same.... and a little dirt never killed anyone ;)

Air Dryer Well after doing the turbo compressor mod I developed a fluttering air loss problem coming from my air dryer, this prompted me to rebuild it since I had no idea how long it had been since it had been done. It is relatively simple, the dryer is a Bendix AD-2 and all of the parts were...

Turbo Air Compressor Mod So this is an engine mod that does not have any engine performance gain but is a must for any owner of a 915-920 truck, for those of us who suffer with mediocre to pathetic air pressure recovery this is a great way to fix that. This used forced induction from your...

your welcome!

I have pics of the aneroid location in the thread, you loosen the locknut and turn the center screw counterclockwise quarter turn at a time (I am pretty sure its counterclockwise you will know after the first adjustment) and drive it, if it produces a light amount of smoke then you can go a...

Not really, I put some BAR LEAK (2 bottles of heavy duty) in the cooling system and turned off the filter for a while and that fixed my leak, I turned the fuel back up to it hit the "fun-o-meter" and it purrrrs right along, Overall I have not seen an increase or decrease in mileage, she does not...

yeah that would have been some useful information to have but I figured that one out the hard way! I am about done under the hood, the next phase is a E/F 15 spd 16R20's and paint. I am glad this thread is helping out others with their cummins mills.

yeah that is possible, I was thinking about fire ringing the heads like they do on the dodge trucks to handle the pressure as well, can the cut the block for liners in frame or do I have to find a way to lug this big bastard into the shop myself? Like I said before, I don't really need any more...

well just an update, I have put a little over 1k miles on sheila and the power is awesome, mileage went up to 6mpg (from 4.5) and she shifts sooo much better. The two best things that I have done are by far the dual fuel line mod (better response off the line, idle's smoother, happier engine)...

yep, I have the big one on my 920 as well

The only gauges I intend to add are egt and boost. Don't much care about the fuel pressure, I am not changing buttons or anything to raise it to any alarming pressure, if it starts to leak I know I have a problem. I am going to drill the panel that contains the headlight switch and such and...

All of these fuel mileage posts all relate to one thing... Power to weight ratio, the more power you have (in the diesel world) the less an engine has to work to get a vehicle to a desired speed. This should also ring true with the modifications that I am making to my truck, well so long as I...

I have not adjusted it yet but I did expose it in one of the pictures above for reference.