There should be more pressure above the injector in the rail, then in the injector tract. The valves will be closed before the combustion, so there shouldn't be any pressure from the manifold (beyond what your boost is seeing). 20psi versus the 3BAR of the fuel rail.

But... I obviously agree that it doesnt seem right. I have pressure tested, there are no leaks, sprayed it down, no bubbles, idling well, no misfires. They are not just "sitting" on the manifold... they are "in" the manifold, but just not as much as I feel they should be (and not as much as stock). I forgot to snap many pictures, and the injectors are already installed.

These Ev14 were actually about 1mm longer then OEM injectors... However, thats just the length of the injector. The distance between the o-rings is what made the issue... The distance between the OEM o-rings was about 2-3mm longer then the EV14.

We are talking about millimeters here, and I very well am just being ultra paranoid and over reacting, but since were dealing with high pressure fuel here...

Thanks so much for the advice/help guys! Car started up beautifully.
- car has no tune right now and just installed clutch, so owner won't be able to romp on it for awhile