I was thinking that you would be able to buy the entire ecm rewrite file from a cummins dealer and have it installed as a normal upfront buisness transaction especially since it is going into a 51 so I don't think emissions will even be an issue. So what I mean is that I supposed that they would look up the tune and down load it. AlxJ64 makes it sound like I would have to have it alsmost pirated from a brazilian ecu. I might just be misunderstanding. But I don't know what the engineer ment by find the brazilian tune somehow.
I was out in the midwest for work this past week and swung by a Cummins dealer one evening that was near my hotel. Man, people are nice in the midwest! Asked the techs a few questions and they were saying that the QSB engines may or may not be slightly different so there is more to it than a tune. What would need to be done is those of us that want the Brazilian tune on a QSB will need to find the CPL of the brazilian motor and make sure the CPL of our motor is similar in parts. They said that sometimes nothing is different, except the tune. They said sometimes its just a turbo difference, or sometimes its lots of things like compression, cam profile, etc. They told me that a Cummins dealer is not "technically" allowed to put any tune on the engine other than what the factory build application inteded it for... and yes this is in regards to the EPA. The engines are built to meet those specs and the manufacturer is not supposed to "enable" the consumer to modify this stuff for any reason as it affects emissions, even if we are installing it in a vintage vehicle. The guys I talked to smiled and said "Technically".... which gave me a feel that if I work out the kinks, they will help me out. I'm not going to say who or where this was though. If I figure it out, I'll let folks know and we can go from there.
So what we need... We need to source the tune or atleast engine profile of the 200 hp engine.... Then need an engine that mechanically is close to the 200 hp engine... From that techs comments it sounds like anything Tier 3 and Tier 4 are the best bets in the QSB line of engines.
The last info he left me with... Buy an ISB 170 and just have them tweak some fuel and timing parameters in the engine. They can set the Throttle Position sensor to a point where basically if you hammer down or exceed X% throttle, the engine WAY adjusts timing and fuel and really steps into a different range... He said there are a "few" parameters that can be adjusted via the J-com port on the ECM but without having the factory hardware and software, they can't go into much depth aside from a FULL re-flash of a stock tune from Cummins.
Another piece of advice, they suggested getting ahold of some of the stand alone common rail ECM guys such as Narwhal and seeing what they might know or have avail. And also, he mentioned that they had a customer a year ago try to buy an ISBe250 or something hot from a Euro- Dealer and have it shipped in. Evidently Cummins has a red flag that flys up and when the engine came in, they had some software ugrades they were asked to install... Not thinking much of it, they flashed the new programs into the ECM... The tune they ended up with was a gutless wonder and the engine buyer was so displeased that he returned the engine to Cummins for a credit towards a used ISB170 and the engine was then parted out and used for other stuff. The ECM was requested back to Europe and they do not have the original flash saved either... sadly. Evidently Cummins KNOWS they would be in hot water for letting one of those euro-diesels into the states... once again... EPA won't get their head out of their azzes.