ISC Cummins........................

[CumminsPuller]

What is different about the RV and firetruck version that you can get a 350HP rating? A friend of mine has a 315HP version in his FL70 and would like to bring it up to 350. He has the CAPS pump... ..... I believe that is what they call it... ... ... please correct me if I am wrong.



Jason

 

[HVAC]

It's prolly not much different then the various ratings for our ISB's. You started with a 215, then go to the 235, and the HO was 245. The 245 had a different pump and injectors I believe, but so much of the differences was what the ecm was programmed for. The ECM is boss. Then we boss it with the aftermarket boxes and go up to 700 hp.

 

[A Johnson]

Yup, the ECM is boss, as well as injectors, pistons etc, etc.



Look at the CAPS pump plug in, where the wires go to what looks like the center of the pump. That is the stator or magnet that gets the fuel commands from the ECM. Now if you look close at the connection you will see two wires go to the Stator and two others terminate inside a 2-pin connector like a dead end. That connector is called an ICV (injection control valve) identifier. It is calibrated to the ICV on a test stand. I believe it is simply a resistor, some I have measured @ 900 ohms some were @ 1800 ohms or so. I've been told that you can effect horespower by playing around with the resistance, I have not done it so I can't tell you which direction to change the resistance or at what ohms it will throw a fault.



I will take no responsibility for anyones actions due to this posting. Beware. You are your own warranty station.



Oh yea, I might mention it is pretty hard to fool Mother Cummins when it comes to failures from overfueling. Hot boxes or not , codes or not, they will know, and deny warranty if they choose.



A Johnson