Accert ECM programming

Yes, It sounds great!!

It also pulls better, may have lifted minimum pulling power 50 revs.

But pulls stronger all the way up to 1800 rpm, probably more.

It will make 380kpa of boost on a good morning, up 15 or 20

As soon as the Bully dog tuner turns up I'll bring up the truck and give you a look.

Maybe you can sell a few on the side for a good commission?

Tony

 

Sounds good.

 

Jas, thanks for reply. just found that PDI has told another member here that the MXS 550 injector is good to 1000 hp . sounds high to me....

I know Cat tends to overbuild for an application but thats almost double.
what are your thoughts??

 

The flow of an injector is only part of the equation to build horsepower. You have to realize that PDI can build more power without changing injector size, because they can modify the fuel and timing tables inside the ECM. This modification hold the injector open longer for more fuel flow, than you add the timing advance this allows the engine to burn the fuel. These modifications together increase power more than just changing FLS/FTS codes do. These things all together get a stock injector to build much more power than what's been available in recent years.

 

good explanation,thank you.

 

But there's still the same problem than with power boxes = long injection duration means more time for a piston to absorb heat and expand.

 

I'm sure they can tell. I would suggest buying a reman ECM and let PDI tune it and keep you stock one for when ya got to go to the CAT shop. If ya got a warranty I would HIGHLY suggest this. From what I hear anytime a motor is at a CAT shop and their computer is hooked to the ECM they are suppose to load the latest emissions files into it. I have heard this from a couple of CAT techs, but nobody in managment that I have talked to will give me a straight answer...I wonder why...

 

What would be funny is if you could password the ECM like Cat does. Someone would would spend the night in the ER if I had a custom tuned ECM and they screwed it up when it was in the shop for another issue.

 

Not exactly

The boxes ###### timing, by lengthening the injector pulse width after the ECM's normal pulse width. PDI's tuning of the ECM lengthening injector pulse width taking the start of injection only from the engine. In the timing tables under full load, the injection pulse width starts earlier to have the center of the injection cycle timed according to the timing tables in the flash file. PDI moves the timing event up to burn the fuel completely, this increases cylinder pressures, but any increase in power does. The boxes injection event is so retarded, because it can only add length to the pulse width at the end of the injection cycle that fuel is left unburnt and high exhaust temps occur along with the potential for scoring a cylinder.

PDI's a lot safer than a PP box when building power. No matter what you do with a diesel engine you can't add the extra fuel without increasing heat and cylinder pressures when building extra horsepower. You just try to do it in a manner that is the safest for engine life. The only other way to add fuel is to increase injector tip sizes, then pulse width doesn't come in play as much. But the flow rates are so high on the 1000 hp injector, I don't know of anybody that's tried them but a truck puller. The other problem is trying to but a set of 6 them, CAT doesn't stock that many in the country at any one time and requires a ser # before shipment.