injectors

[badjeebus]

hello all,i have been reading many different topics about replacing the injectors on a 93 4.0 ho engine ,,,,,,,,motor is stock,,im interested in finding out which injectors work or perform better , the stock ones , i`ve heard 5.0 litre ford ones , so which ones people,thanks in advance.

[holeski]

I was just going to ask something alone these lines. A FAQ on injectors might be a good idea. I have a set of Bosch 0280150556 D5B-19lb I think they are, in one motor. What are the pros and cons of single hole and muti hole injectors?

[holeski]

http://www.jeepstrokers.com/forum/viewt ... =injectors

I'll give you my opinion on a 27 lb injectors. On my build, a 4.7L w/ ported and polished head, 62mm throttle body K&N in my 2000 XJ the injectors I choose at first were something like 25 on a lower psi rail. On my 49psi rail it worked out to be 27 lbs. Without input from my APEXI it was running richer than 10:1 AFR after 3000 rpm. So, I wouldn't recommend them. I have another set that works out to about 24 lbs on th3 40 PSI rail that I haven't tried yet.

http://www.jeepstrokers.com/forum/viewt ... =injectors

[SilverXJ]

Your mileage will vary depending on variables. I actually went back to using those injectors, but there is probably a better match available

[gradon]

I just picked up MarineJRM's 27#ers(on my 49psi rail) because I couldn't get my afrs down to 12.5:1 fast enough in 5th gear WOT with the psc1 maxed out and the LT1s at 25.5#(100% duty cycle isn't good, 80% is preferable). My stock 4.0 injectors were 23.2# and now that I have an additonal 15% displacement and heavily ported head, it makes sense that 15% bigger injectors would be required=27#.

[99_WJ_4.0]

So I'm currently in the same boat as far as figuring out what injectors I need to find. I have a 4.6 stroker in my 2000 wj and it HAD taurus injectors in it...was running like crap and came down to those being the last thing left to change so I put stock ones I had laying around in it...runs better but obviously not ideally...I bought the jeep with the engine in it and tho I know alot about the wj grands, having had 8 in the recent years.. I don't know about strokers...it has 50k on the rebuild but I want it to be proper...thought of going to a custom ground cam that a company I've spoken to has cut for them that is quite a bit more aggressive than the off the shelf one it has in it...I want it to be a mean SOB.

[SkylinesSuck]

Are those EV1 or EV3 connectors?

[99_WJ_4.0]

I honestly don't know what they are. I wasn't even aware that you could swap injectors from other makes into vehicles. Not something I've ever tried. New to the whole modified engine thing.