neon injectors and FPR?

dodge neon fuel injector swap

goign to do this on my 92 4.0 HO engine but had a few more questions
i am getting the EV6 4 hole injectors from a neon part number 0280155703 they are rated 22.6 lbs

91-93 4.0 have 21 lb injectors at 39 psi.
do i need to change to the later style FPR to run the neon injectors?


here is what i was reading:
http://www.ausjeepoffroad.com/forum/showthread.php?t=92236

"91-95 Jeeps with Fuel Pressure Regulators (FPR) on the fuel rail.
Stock FPR Chrysler # 5303 0001 Supplies 31psi @ Idle and 39PSI @ WOT


Chrysler # 4418850 or 5277829 or 5277864 (Manufacturer: Delphi, Part#FP10046) Supplies 40psi @ Idle and 48PSI @ WOT Drops straight in, no modifications. ~$40USD on US fleabay. (thanks to coas from cherokeeforum)"



but i have no idea what PSI the neon injectors require
thanks

22.5lb/238cc @ 43.5psi is what the Neon injectors flow. At 39psi they will flow 21.3lb. You shouldn't have any flow problems.

While the FPR info is helpful you don't need it.

thanks for the info i just wanted to confirm this conversion will work with the FPR i have on the jeep right now. i thought it would but i couldn't find where i read that.
thanks

does anyone know if this mod/swap applies to my brothers 99 WJ with the 4.0?

His FPR is on top of the pump on the tank. The only known regulator for that is hesco's unit which is $300 IIRC