Holey DPF!

[hookliftpete]

This is the results of the 'Can't win with new injectors in ISC' thread.

I ended up replacing the remaining injectors, tubes, supply lines, etc. Despite my preference, I did not end up doing a delete, for several reasons.

Also, with an old dpf laying around, I thought I'd give it a try and put some holes in it! Shoot me if you like, but I'm 4 weeks out now with 20 3/8" holes in the filter, with the dpf differential pressure reading normally and no regen performed by the ecm since. I have done a parked regen, which as expected, completed very quickly, and made tons of smoke.

What are the pitfalls to this approach? DOT could be nosy and see the bit of soot on the tip of the stack, but otherwise the aftertreatment system is doing it's thing.

I realize that 20 3/8" holes are not going to allow the same volume of exhaust to pass through and some of it must pass through the filter. If so, and it never does a regen except when I force one, will this create an issue down the road?

So far, I'm happy, since I'm coming from a regen every 4 hours or so, and have picked up 1/2 mpg on average.

What say you more experienced folk?