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Rawze

(12-03-2020 )FUDGENWORTHIT Wrote: ... at 750/2350 currently.
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How much you want to bet if u took it to a certified dyno that was not part of their Puke-network of idiot delete shops, you will find it falls far short of this. They have been caught lying to their customers with their dyno reports multiple times in the past few years, their dyno's are rigged.

The last guy who came by here that claimed his was making 780HP, he showed me the dyno report form their lying dnyo... we took the truck down to a real dyno, it actually peaked at about 668 or so, oil temps were higher than they should have been too because of the excess internal engine friction due to their horrible tuning and all the other problems that are seen. Sad part is that this same HP 660~ish can be achieved without any of those engine killing mods.

Next,. the 2350 CAN actually make 750 - 800HP output. Not that a highway truck that is supposed to make money should be turned up that high, it shortens the engine life to about half or less... It has been done correctly by ppl on this forum. It does not take all the garbage they sold you, and can be done with like Sig600 mentioned a proper HX60 made for an ISX (though i am strongly against them as well, but at least it is not as abusive as the garbage you have on it right now), or even better yet, a proper 500-series VGT turbo, as they can handle about 900HP easily while still being a VGT and retaining all engine brake and other benefits. None of the engine brake should have ever been sacrificed, and certainly not a different cam garbage. Those people in utah are scam artists and they ere good at convincing truck owners of this abusive mess. Even at 800HP, the CMN2350 only needs about 33-34PSI of boost to get it there. Any more is severely abusive and will eventually kill a cylinder or crack the head... The engine already has 18.9:1 compression ratio and needs very little help to make HP out of it as far as boost goes. That thing is noting like the old cat engines that were only 15.8 or 16.3:1 and needed 50+psi just to get em going... you do that to that engine and you can kiss it good-bye and the 43+psi you say its making is well past the downright abusive over-boosting, cook the cylinders and head rage for sure, it not adding anything towards making proper power at this point.

The issue with actually making much above 700HP however is the fuel system, not the intake, or exhaust or other trash that company tries to victimize their customers with. The fuel system on the 2350 cannot keep up with the fuel flow demand for an actual 780+ HP on its own and this is why I knew right away that the truck was not making nowhere near what Puke claimed on that dyno report the guy had. It just does not have the flow rate so it needs some serious help to get the engine to actually show 750,+ or 800 on an unbiased certified dyno and this is exactly what we found.

The fuel system needs about 40-PSI of fuel pressure ( a fass fuel system set to 40 psi comes to mind) placed on its intake to get it to pump the volume needed for an actual 800HP and a 561 series VGT turbo with its thicker steel shaft + factory manifold from a 600hp cm871 would get it there easily. - No other mods are actually necessary aside from the inatake and exhaust piping past the turbo need to flow as freely as possible.

Even with proper fuel flow on a common rail ISX, the pressures and flow demand while making an actual 750+ need to be kept higher than normal just so it does not run out of flow ... but good luck keeping it there if the engine it driven with that much power very often ... All the negative effects have already been seen from this by those few who actually have genuinely made that much power with a CM2350 and did it properly. The pressure relief valves are going to constantly blow out/wear on you due to demand surge, injectors are not going to last nearly as long with the average higher pressures and constant higher temps than normal if run at high power levels a lot, the fuel pump is going to need new guts every 200k miles or so due to accelerated wear form the extra fuel pressures and demands, and there are other issues with it no matter what you do. - This is no way to run a trucking company at all. It is costly even if done correctly, but what you have done is everything wrong that you could have done to compound these known short-comings and therefore Why the rant above is so strong.