Engine/Transmission (1998.5 - 2002) Cummins reply to lift pump inquiry

[ntillm01]

Tank pressure

I think adding pressure to the fuel tank would cause the engine computer to go wacko.

 

[Cobra]

vp44

Maybe I am reading something into this but here goes.



In the reply the powere master stated that Bosch claims 2000 hours of life at 100 percent rated horse power. Doesn't that indicate that those owners who are using fueling boxes that cause the horse powere to go over the rated horse powere are shortening the life of the VP44.

 

[illflem]

It's pretty much a fact if you jack the hp of any engine up that it's not going to as long as stock.

 

[A Johnson]

Originally posted by illflem

3-5 psi is about what we pressurize the engine to though the blowby when doing the KDP jig repair. The only people I know of who have blown any seals have ran the pressure up to 30+

I won't disagree with what works for you. I must argue that it is only for a few minutes while drilling the hole for the KDP repair, and the engine is not running, perhaps the rotation of the crank inside the seals has something to do with it.



In my experience when a truck comes in with oil leaks to be repaired and it has over @ 15" of blowby, you are wasting your time putting new seals or turbochargers on if it is blowing it out the turbo.



I stand by my previous statement.



I know that at one time on the K series engines, Cummins had come up with what they called active cooling pressure. It basically used turbo boost into the radiator cap to increase the coolant pressure and help eliminate cavitation of the liners. I had thought of trying to come up with an "Active" fuel pressure system but the worry of exploding a fuel tank has kept me fom going there. Perhaps it could be done if an aftermarket steel tank was available.



A Johnson