General: Cummins VT 903

Any idea on what those valves are called? I'd like to try and find one before I fly back down to florida and see if it fixes the problem rather than parking it in a shop and saying "it dun wurk gud".

Good to know on the gauge. I'm only getting about 8psi around 1500rpm. I still need to look for leaks and cracks in the air system. Just wanted to make sure I was too far off. Felt a little power drop off on some mole hills bobtail, but that wouldn't be a shock out of a 30 year old 290hp engine at 17,000lbs.

I'd at least like to sort out where peak torque and horsepower are sitting right now so I can keep my fuel costs in check until I start playing with things. I've always been one to want real numbers over a hunch.

 

They still regularly turn them up between 600-1000HP for vehicles. Some sort of tank, or whatever it is they're calling tanks these days if I recall correctly.

I'd be fine with 400 so I can keep up with the big cams.

 

Alright. I'll talk to KWpartsguy and see if he can help me quess at it. If its under $40 I'll just grab it online and throw it in my suitcase.

Shouldn't take me too long to see how high the needle goes if I get stuck with a power only load from JBH.

Information on this engine is incredibly sparse online. Beyond shimming the fuel pump its still a mystery to me. I suppose I should give it a harder looking into, but if you know where people got that info back in the dark ages, I'd appreciate the tip.

 

I was thinking of the AS-90, which also isn't a tank, but a "lightly armoured self-propelled artillery piece" with a 155mm gun running at 660HP.

Also, the M9 ACE, also not a tank, but a "highly mobile armored tracked vehicle that provides combat engineer support to front-line forces" which runs N/A at 220HP.

As well as the AAV7-A1, not a tank as well, but a "fully tracked amphibious landing vehicle" running 400HP.

And of course, the M41 Walker Bulldog light tank, which is actually a tank, and some were retrofitted with 903s set around 500HP.

They're all tanks to me, but I suppose I could be equally wrong assuming they were all light armor vehicles as well. Guess this is why I'm driving a truck instead of pouring sand out of my boots.

Happen to remember which shims and springs I need to throw in the fuel pump to put out closer to 500HP?

 

I've got an old military operation and mainenance guide for the PT fuel system. Would that refresh your memory?