Fuel screw vs pop pressure

[VEfreak]

Now correct me if i'm wrong, but when you turn up the fuel screw it increases injection pressure right? So if i send my injectors to get extrude honed(i'm a cheap bastard) should i have the pop pressures reset, because my pump is turned up?

[PToombs]

Negative. Standard pop pressure for a VE pump. If you up the pop, then the pump eats itself. VE's don't like to push high pressure.

[VEfreak]

alright, cool. Thanks

[PToombs]

No prob man.

[Begle1]

Can we lower pop pressure to aid top end fueling??

[PToombs]

Hmmmm, I don't know!
I know lowering it will be like advancing the timing, because they'll pop sooner. I think it won't be as effective as it sounds, the fuel won't atomize as well at the lower pressure.
Same thoughts I had when the guy wanted to turn his fuel screw way out, not enough fuel to atomize properly.

[VEfreak]

yeah, that's exactly why i wanted to know if you could turn the pop up! Better atomization will aid the smoke all these things make and raise the ceiling on horsepower potential.

[bgilbert]

I'm sorta in the same boat right now with pop pressure. Right now I know, don't have them set higher than stock!

[dpuckett]

I've seen them popping at 3550psi and 3800psi on the stand, and I cant tell a lick of difference (both are really fine), but the pump sure can. I'd say set them no higher than stock, maybe even a little lower (32-3400?). Just be sure not to get too low, as the fuel may not atomize well, like Pete suggested. I have a set sitting at the local shop that I said to set to 3500psi. Not enough to lower atomization, but enough to maybe relieve some pressure on the pump.

Daniel

[dpuckett]

I've seen them popping at 3550psi and 3800psi on the stand, and I cant tell a lick of difference (both are really fine), but the pump sure can. I'd say set them no higher than stock, maybe even a little lower (32-3400?). Just be sure not to get too low, as the fuel may not atomize well, like Pete suggested. I have a set sitting at the local shop that I said to set to 3500psi. Not enough to lower atomization, but enough to maybe relieve some pressure on the pump.

Daniel

[Greenleaf]

The POD,s which have been in use for years now, are much higher then stock setting. They function well @ 260 Bar. Ity's why one must advance the time to operate them.