Hey, Does anyone know if a predator programmer increases fuel preasure /change inj timing or one of them I have herd different stories.

No it shouldn't increase rail pressure.

Which Predator????
The programmer by Dialbo or the pressure box by Dr. Performance.
As you can see by my answer, could say yes and could say no. Both could raise rail pressure but only one can change the timing. Hope this helps

Anyone that who has a Predator (on edit: read Diablo Predator) and has installed one of the Tunes in the ECM can check this by using the Predator monitor function. With a tune installed, monitor the Common Rail Fuel Pressure. When accelerating hard, you should get a reading of around 159 MPa on the Predator (roughly 23k psi). If the value is substantially higher than this, then the Predator tune is commanding a higher fuel rail pressure. Example: Banks has said that on their Banks Six Gun product that they command up to 26K PSI on their highest tune. This would equate to roughly 179 MPa.

You can also check the injection timing with the stock tune installed and then with the Predator tune installed by using the Predator as a monitor. I suspect that the Predator advances the injection timing a little bit. I know the TTS Tow tune does once off idle.;)

2500HDING (http://dieselplace.com/forum/member.php?u=1347),

The Predator programmer by Diablo does increase fuel pressure as well as timing and pulse width of the injection system. It also does a ton of other diagnostic and down load features. The Predator AKA Dr Performance is only a fuel pressue increase product.

We only sell the Predator by Diablo Sport, as well as Super Chips, Edge Van Aaken etc. Call us if you have any questions etc.

Mark @ DPPI
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The Predator does not directly command any increase in rail psi...