Mike T.

I'm thinking of having the tips worked on and was wondering what's involved when you remove the tips?

Also wondering what happens when you increase pop pressure above normal/stock with a VE pump?

Thanks
Mike

90firstgen

Can't help you on tip removal as I have never messed with them. But as far as increasing POP pressure, As long as its not raised too high, the only side effects are retarded timing. IMO, higher pressure would be better for atomization. Stock pressure is 245 or 250 bar. POD's, for example, are 260 bar. This is why they need all the timing you can give them.

TruckU

Higher pop pressure apparently puts more pressure on the cam and rollers in the pump. I think that's what is going wrong on mine. Had it modded with high pop pressure, and now the ULSD monster has caught up with me (or so it appears)

JD730

I had a set that got accidentally set for P-pump pressures and it did not run very well and it lost almost 40hp/100ft lbs. on the dyno.

wannadiesel

And those were much bigger injectors than the ones they replaced...

A couple bar extra won't make a big difference, but there's no sense in working the pump harder for little to no benefit.

ewatts2003

There is no advantage to raising the pop off pressure on the injectors. Even with bigger tips the injectors themselves are designed to pop at a certain pressure, and that coincides with the pressure from the pump, etc... Whenever we do bigger tips on any injectors we always pop them at the stock injector pressures.