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  1. Beerslayer

    NHC 250 needs more power

    Bottom line on an 855ci Cummins, turning up the fuel won't increase horsepower at all without: 1. Bigger injectors. They are not like the multifuel injectors. They will spray a little more with increased fuel pressure but not enough to make a difference. 2. More air. Dumping more fuel in...
  2. Beerslayer

    NHC 250 needs more power

    On any turboed engines I operate I try to keep the EGTs to around 1100 deg f.
  3. Beerslayer

    NHC 250 needs more power

    Well from what I know, the NHC 250 is not that easy to get more power out of. At 855 cubic inches, it is the same block as the 400 but there are a lot of differences. Without going into the painful details, you can certainly turn the pump up but will need bigger injectors to do any good. With...
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