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  1. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    That's the throttle screw, an AFC would be on a factory turbo'ed engine.
  2. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    Just FYI, there's a simple way to subscribe to a thread without making a post. Just scroll to the top and click on the thread tools link and you'll see "subscribe to thread".
  3. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    This thread is about the NHC-250, so none will have the AFC.
  4. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    I plan on ordering one of these: http://www.surpluscenter.com/Air-Pneumatics/Pressure-Gauges/Pressure-Vacuum-Gauges/300-PSI-1-5-BM-LF-GAUGE-21-1700.axd And this hose...
  5. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    Not yet. I've been putting off placing an order. I really need to replace all the hoses in the crane on the SEMTT, but I need to get out there with one other person and a tape measure to figure out exactly what all I need. Surplus center already sells hoses with NPT ends, that was what I...
  6. patracy

    I lost some power please help

    M923 has a lot of difference between it and a M923A2. The 14.00's allow for that MPH.
  7. patracy

    Patracy's "SEMTT"

    I went for a drive but noted that it was defueling at about 1950rpm. I mean fall on your face defueling. Even rolling down the hill it was defueling. Came back home and noticed a retainer/shim on the ground I must have dropped! While on the road and driving, I saw almost the same EGTs...
  8. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    I went for a drive but noted that it was defueling at about 1950rpm. I mean fall on your face defueling. Came back home and noticed a retainer/shim on the ground I must have dropped. While on the road and driving, I saw the same EGTs (perhaps about 10-15F higher, but the gauges resolution...
  9. patracy

    More Power From NHC 250 in M939 Series Trucks With Allison Transmissions

    I swapped in a #20 button. Stock was a #30!
  10. patracy

    Patracy's "SEMTT"

    After my jog this AM, I decided to change the buttons. I figured out why this thing has no problem free reving to 2400+ rpm. There's gotta be nearly a 1/4" of shims stacked in it. But the more interesting thing is, I don't have a 27 button like most. I have a 30 in it stock! So it's now a...
  11. patracy

    Patracy's "SEMTT"

    Went to see Wreckerman today and picked up two more locked axles. (I have 3 total now) That's going to be a job to swap in. I did drive the SEMTT around yesterday a bit. Everything seems to be doing well. EGTs are 900F under WOT in 5th no load. Tomorrow I'm going to drive it around a bit...
  12. patracy

    3rd member swap in truck - looking for advice

    Know what you mean! I'm going to measure from pinion flange to flange as well as across to see. Maybe if I could find a cardboard box with that measurement, it'd be a quick test to see...
  13. patracy

    3rd member swap in truck - looking for advice

    I know the springs and lower dogbone/perches should keep it in place. But I was kinda thinking about leaving it on the ground (If the 3rd's can come through the frame). The top dogbone mount will be the problem as I see it when it's undone. I suspect it'll move a bit. But I think a...
  14. patracy

    3rd member swap in truck - looking for advice

    Too bad I don't care to please you.
  15. patracy

    3rd member swap in truck - looking for advice

    No, just working on the rears. Mainly wanted to see if someone has done it in truck. I've been through a 2.5T front and rear a few times. Just wondered if there's enough room to pull it.
  16. patracy

    3rd member swap in truck - looking for advice

    So I've got some locked axles here that are going to end up in the SEMTT. Looking at things, I think this can be done without swapping the axles. (And I know I'd rather keep the current ones since they have the ABS parts) The SEMTT started as a M931. I'm thinking I can take off the front...
  17. patracy

    Have prices gone berserk?

    Normal cycle as the inventory goes out of the system. Starts very high, bottoms, then goes high again when little of them come out.
  18. patracy

    Nhc-250 oil priming before 1st start up after rebuild.

    Hey, another idea and less complex would be the trick we've already been doing with the pump sprayer tanks and DOT5. Do the same thing only with oil. Again under $20. Probably faster too. Less mess at least. But you'd probably need to lube with syn 5w15 to get it to flow easily enough.
  19. patracy

    Nhc-250 oil priming before 1st start up after rebuild.

    Actually, if you happen to find a pump with an output port of 7/16, you could tap that to 1/4 NPT without even having to drill it. Would be quicker than welding too and less prone to leaks. Or find something with a port that could be drilled to 7/16.
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