What I am wondering is, would an increase up to say 400hp be to hot for the cummins or the allison? If it were a duramax I would have no concern with it or the allison transmissions with a 70hp increase but I do not want to make any assumptions on something I have no real experience with. (Meaning slow acceleration at highway speeds when you may want to pass someone, drops speed significantly on hills but will move right along on the flats as long as there is no head wind.) It has the Allison 3000HS 4th gen transmission on it as well. The truck has no issues but it does pull it similar to my 3/4 ton lb7 does when I pull a heavy trailer with it. Currently I just use the truck to pull a LQ horse trailer which weighs a little over 15k empty and between 20 to 23k loaded. My experience has pretty much been confined to the duramax engines. It is a 330hp and I am going to delete the egr and dpf filter, it has no def, and I was wondering if anyone had any first hand knowledge or info on how those engines handle a higher HP tune.
I am new to this forum and I joined mainly to see if I could get some feedback or info on an 8.3L ISC cummins I have in a 2010 Freightliner M2 I recently purchased.