Jeep Strokers

Test subject is a 4.7 stroker with a mild 256/264 Crower cam, stock springs, rolling rockers, hyper pistons, 92 ported head, 92 exhaust, 98 computer, 99 intake with feedback rail and I'm still drafting intake mods. Which brings me to another extremely important factor that I probably should have looked at from the start. In summary, I started with a tired 4.2L and jumped straight to this. I'm new to the EFI circus, have no idea what the stock injection specs SHOULD be but I assume ~50psi should be good for the pump. I know those stock EV1 injectors have to go. They're too weak in flow or other performance issues saturated with lifespan problems and will never feed this engine proper. I have not determined a complete fuel delivery system! These scenarios likely require new injector sets or new CPU drivers or both and I'm all but completely lost.

First issue:
Engine is N/A and will operate ~100ft above sea level. I've found endless listings for 4.0L injector upgrades but NOTHING on feeding a 4.7 stroker. Injector tables are a mess and calculating X psi rated across each application gets better when I have no idea what cc is too rich or too lean. I don't have an A/F gauge to figure this out, it's all prep work for the first run and it needs to go right. I'm assuming it should be between 200-250 because the instant response I keep reading with this sort of question is "use 24lb injectors!" or "Accel!" Neither of these make sense to me. Am I right to assume this engine should produce 250-300HP peak? Is there a narrower window to accurately predict these figures? What injector sets can get it there?

Second issue:
I've wandered junkyards enough to figure out the stock injection system on 4.0L Cherokees aren't exactly ideal. Easily compromised by poor flowing fuel pumps, stuck injectors, weird regulator pressures and...Oh yeah. Horribly wasteful and nasty leak-prone EV1 injectors that laser directly to the base of each valve. I have a 53030778 injector in front of me from a 98 Cherokee and while it tests great, the flow rating seems poor, the pinched stream is proof enough it needs cleaning and the seals look unusually good for the hard and cracking o-rings stuck in the rail. I'm guessing this Cherokee had the 49psi fuel system and was serviced at some point? Jury is out on the regulator or what I'm going to use on my rail but that's something that needs addressing before I add boost.

If I use a fairly decent injector set on the above N/A setup, will forced induction require that I go back and replace the injectors with an even higher flowing set despite being handled by the stock Chrysler computer or does a dedicated injector with some outdated GM tech fix the surging/leaning boost issues, making the S/C a true bolt-on accessory? I'm probably overthinking it all but this isn't easy to gauge what I should be doing when I seem to be a total outlier here. I know there are two or three of you guys out there that understand everything I just listed so it would be good to have some idea of what to expect.

Here's what I currently believe is in the range that I should be looking for:
Bosch 0280155703 - Dodge Neon 2L (DOHC)
Bosch 0280155737 - Pontiac Bonneville SSEi 3.8L
Bosch 0280156028 - Ford 4.0L

Is there anything more worth checking out?

DaemonForce wrote:Test subject is a 4.7 stroker with a mild 256/264 Crower cam, stock springs, rolling rockers, hyper pistons, 92 ported head, 92 exhaust, 98 computer, 99 intake with feedback rail and I'm still drafting intake mods.

Judging from those stroker specs, I think you're going to be somewhere near 240hp so you're going to need injectors that flow ~24lb/hr at whatever fuel pressure your system normally operates (I assume 49psi).
I believe the Bosch 0280155703 Neon injectors flow 22.6lb/hr at 43.5psi or 24.0lb/hr at 49psi so they're exactly what you need.