maybe368

I can't answer your question, but I do remember that the act of torquing a bolt, once it is contacting the surface, is literally stretching the bolt:

Engine Sealing and Proper Head Bolt Use

How to Understand Angular Torque and Torque to yield - WB Tools ...Mark

dodgenstein

Cummins head bolts are reusable, evidenced by the stretch gauge included in Cummins head gasket kits. It is a cardboard template, that measures the relaxed length of used head bolts. If the bolt is longer than the gauge, pitch it.

1972RedNeck

They are not torque to yield - they are torque to turn which are reusable to an extent.

NJTman

Well, Jim,

Now that I read this thread here : https://www.dieseltruckresource.com/...orking-165546/

Your statement above makes perfect sense. Sure took long enough for it to find it's way out, eh ?

Jim Lane

NJTman,
Wow
Check this out, after racking my brain to try and think where it might have come from and then you posted my article,

I went back through thousands of albums and found my original pictures of the incident and I think I may have found it.

Now I feel better that I know that something did not break inside my engine.

I can't believe it took over 10 years to make its way out of the engine, 2007 to 2018.



Thanks
Jim

Jim Lane

Hey guys, there has to be a few turbo guru's out there,

I am still looking for an answer to my low power.

Is it possible that my H1D is pushing more air than my old H1C and I need to turn up my fuel? no other adjustments were touched on the pump.

I also notice my turbo now whines louder where I could barely hear it before.

I used to be able to hit 1300* with a stab of the throttle where now I barely get 1000* at WOT
Jim

edwinsmith

Since the only change was the injectors it's a fairly safe bet that is the cause of your power loss. Have you tried turning up the fuel screw? What did the injector rebuilder have to say?

Edwin

Jim Lane

Guy at BECS said the injectors we're below specs on the pop pressure so they we're disassembled ultrasonically cleaned and reset to specs, got the same ones back.

I have not turned up the fuel yet, I wanted to explore any possibilities before.

Is feels like a ruptured AFC diaphragm but I know that is ok, I can move it with air pressure.

Why would my turbo be louder under boost after it was replaced?

Does an H1D flow more than an H1C?

Art said he installed a turbine from an H1D and did some modifications, the tag list it as an H1D

I will disconnect the boost line from the pump to see if I have the same power.
(Rule out fuel pin)

Alec

Yes. But that doesn't mean that it will give you the drivability that you want.

The larger compressor can generally move a larger mass of air. But it isn't so good for generating higher pressure ratios at lower flow rates, which is what you want for responsiveness "off the line".

So far as noise, if the new compressor housing has a "Map Width Enhancing" slot and no silencer ring, it will be much louder than the stock turbo was.

I would check the afc functionaing as you describe.

Assuming there is no problem there I would turn up the fuel. Clearly you have "room" EGT-wise to turn up the fuel significantly, and the new turbo configuration should let you burn significantly more fuel, and generate more horsepower, at higher engine speeds.

edwinsmith

I haven't tried this before but attached should be the data sheet in .pdf form.