No, like i said the the gauge is mechanical and its plumbed into the head itself with a line going to it, ecm has nothing to do with that.

The ecm gets it readings from the boost sensor, thats what you have to put the regulator behind.

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Hope this explains, you put the regulator behind the boost sensor.

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LOAD EM LIKE RAIL CARS, DRIVE EM LIKE RACE CARS!!!!

You dont need the regulator, you can cheat the sensor.

I copied this from some internet site, it´s for gasoline engines but the same works for diesels also. On diesels you just dont have to care about leaning the mixture.

Many engine management systems cut the injectors when turbo boost levels rise too high - it's the manufacturer's way of protecting the engine if a wastegate hose falls off. However, if you're deliberately raising boost, it's a brick wall that you don't want to run into whenever you put your foot down. If the boost cut is made on the basis of a sensor voltage (eg from an airflow meter or MAP sensor) that rises above the preset level, a very cheap and simple clipping circuit can be used.
What it does is prevent the signal from the load sensor rising above a certain level. This also means, of course, that if that sensor is being used to control the amount of fuel being injected, then this fuelling amount won't keep increasing with load - after all, the clipping circuit is stopping the output going any higher! (This is just the same as nearly all modules on the market which disable overboost fuel cuts.)

The circuit consists of two diodes and a 1 kilo-ohm pot. Its sensitivity can be adjusted by rotating the pot - this should be set so that the circuit clips at as high a manifold pressure as possible. As with any of these techniques, the power over the car's electronics is very great, so extreme care should be taken that the engine doesn't suddenly run lean during the setting-up procedures.

Thats a very usefull post V8Lenny, i use to "clamp" the MAF voltage on some of my cars, but i never thought of doing it on the truck.

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Some info that some of you may find intresting. I just finished having some work done to my motor and finially I'm happy (well I havn't seen the bill yet), but I put a used 6nz cam, and set of injectors, into a rebuilt head, and a new set pistons and liners, along with the ECM that I bought from PP into the POS MBN and what a difference. Lots of power, 1010F is as hot as it will go, no more 1400 - 1500 RPM vibration runs way smoother and best of all way better fuel mileage. Was burning 335-340lts a day now on the the same haul burning 295-300.

Thats what people are missing, all it takes is a ecm swap and its like adriving a whole different truck. Glad you're happy sleepless

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Couple of weeks back, I had pm'd sleeplessnights asking his thoughts about the ecm from PP, and from what he wrote, wasn't satisfied with the results of just the ecm swap.
Apparently it took something else in the last work performed to his motor to achieve the right combination.
I shouldn't be talking for him though. Maybe he can chip in and tell us more.
Wish it would be possible to figure exactly what brought about the change for the better. Cam swap? Injectors? Perhaps there was a defected part that wasn't diagonoised prior to the swap.
After reading his email, I decided to try and find an ecm off a 6nz model that came out of a W900 close as possible to my '04 mbn; hopefully that would eliminate much of the "trivial" differences that may occur if I were to get an ecm out of, say an International. I think (hope) I could find one cheaper than the PP model, and simply swap them out.
Someone on this forum has also stated it is possible to re-program an mbn into a 6nz, however before I do that, I think I would try it on a spare mbn ecm, that way if it doesn't work, you can just put your original back in.

You can but you cant

CAT is the only one that can do it but they wont no matter how much money you throw at em. The PP ECM is supposed to have some hot codes in it, but after i seen their settings its a stock 550hp program. When i went to a 6NZ ecm i saw a huge difference in how the engine performed.

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550, whomever told me about the mbn ecm re-programming being possible, was a former Cat tech; (I think!). Supposedly they had the software to do so. Having heard so much about it being an "in the Cat shop, and therefore not gonna happen" type of thing was another reason I would want to send a spare to be reprogrammed , in addition to no downtime. Going to have to do some thinking and checking back to see if I wasn't dreaming though.

Droy the 6nz engine I bought for parts had a Ecm on it. I took just the Ecm into the shop where I had the repairs done and they hooked up their computer to the Ecm and read everything that was on it. It turn out it was a 475hp 1750lb rating so I asked them to re flash it to 550 - 1850 and they told me no problem but if I was doing it to just sell it I should sell it as is and let the new owner do it because then they could set all there info in it at the same time. The mechanic said he thought that the cost would be about $200 to do that.
I don't know what made the difference because I changed so many thing at once but if I had to take my best guess it would be the cam. the injectors are different part #'s but to look at them you can't see any difference, same with the pistons. The head is the same I used my old rocker arms and jake heads they all are different from the ones on the spare engine. One other thing I had the head rebuilt from the 6nz ( new guides seals ect) and they also shaved it down about .006. I dont know how much difference that would make, but it should give it a bit more compression. They said it was still within spec. Also did I read in one of your earlier post that you found your truck to be noisy? this seems to have quited down the jake somewhat as well. If your going to ever buy new mufflers check out Donaldson web site they make a muffler called Silent partners, they aren't cheap but I sure am happy with them. I paid about $200 each. Also about what made the biggest diff, I dont think any of the changes would have worked out with out a 6nz Ecm.