injectors

[amcinstaller]

i know this has been discussed alot, and if you search, you can find numerous threads, but can we add a few injector part numbers to the misc part numbers thread? maybe throw in a few differences (plugs, holes, pintle, all that crap)

[Cheromaniac]

I'll kick off with some of the injector part nos. from my site:

http://www.jeep4.0performance.4mg.com/tech_specs.html

[amcinstaller]

you know, i looked on every damn tab but that one......

[omegatron]

Thanks for making this a topic and for all the useful info....now for my newb question

What does one do about the injector connection brackets? I thought that the connectors for OBD I and OBD II are different. Does one need to use OBD I injectors (95 and earlier?) to mate with early jeeps and OBD II for the later model jeeps? Or do you need to find the correct mounting clips and splice them into the wiring harness? Thanks in advance and I hope that makes sense.

[SilverXJ]

I don't know exactly when the change over for the injector plug style took place. 96 maybe? The earlier style uses the square style EV-1 connector. The later style uses the more rounded EV-6 connector. Can be seen here:
http://www.witchhunter.com/injectorconnect1.php4

Five O Performance sells injector connector adapters. http://www.fiveomotorsport.com/electrical-connectors/

I use the Bosch 0280155865 from a Mustang cobra. They are also known as XR3E-C5B. They are 24lb/hr at 43 psi. They work to around 26lb/hr on my 49psi fuel rail.

There is also the Bosch 0280155849 used in the ford Taurus/sable that has the EV-6 connector.

When choosing injector don't forget to take into account the lb/hr is at a certain psi and adjust accordingly. There are a few calculators on the internet that will do this for you. http://www.witchhunter.com/injectorcalc1.php4 Also, when you see bar instead of psi multiply the bar number by 14.5 to get the psi.

Here is a good thread with some injector information: http://www.jeepstrokers.com/forum/viewt ... f=5&t=1089

[rammit11]

i need to get some idea of what size injectors i need for a 4.6 short rod stroker. I have a 98 cherokee obdII and running the stock 49 psi at the rail. I am doing some mild head work (1.940 ls1 valves 1.5 exhaust) 99+ intake around 9.1 compression and was estimating about 270 hp with the a little bottom end work. I am hoping that the 24# units will be enough . I would appreciate any feedback from those of you that have engines running or had them running.

[SilverXJ]

What 24# ones?

[rammit11]

sorry my bad not saying the ones from the ford engine . I also have the wiring harness for the injectors from the newer intake as well. I am not sure if one style is better than the other.

[jtiegreen1285]

I just finished my first stroker and am about to start it. I have obd2. Is a tune necessary? I have ford #24 injectors.

Screen shot 2011-02-17 at 8.22.04 AM.png

[montelibre]

I also ran my first Stroker 4.6 with 24 lb/hr ford injectors, and it worked correctly without any additional modification.

[97_xj]

I'm rebuilding with a "poormans stroker" kit. Just the 4.2 crank. 4.2 rods and 4.0 pistons. Is it totally necessary to switch out the stock injectors. I'm on a tight budget. Its for 97 xj and I would like to run 87 oct. Fuel. And if I do need to change them. What would you recomend? Your help is greatly appreciated. Thank you

[WJ 2000]

YES'' I would, Iam starting on my WJ 2000 next week, I'am doing the poor mans, but new KB pistions
Head porting , 62mm throttle bodi, and the most important M-9593-AA302's Ford Injectors
here's the chepest I, can find http://www.blueovalindustries.com/engin ... n7400.html
But I got a question for ''our'' injector Guys here'' so I find these brand new injectors and they
have been just siting on a shelf for a couple of years'' So you see'' What can to make sure that
these injectors will still work correctly ? ? I'am sure every one wants to know this One''

[SilverXJ]

Most of those Ford injectors are rated at a lower pressure than out fuel systems are. Which means they will put much more fuel out on our fuel rail. As well as being under rated to begin with.

For example the Ford Racing (which flow similar to the the XR3E-C5B which I recommended against earlier) ones mentioned by WJ 2000 they flow 24 lbs.... at 39.1 PSI. At the our 97+ fuel rail pressure they will flow around 27lbs. Too rich. On the 97+ I would stay away from anything rated at 24LB on a Ford.

I have used Jeep 53032704AB injectors used on the 4.7L V8 with very good luck. They work out to about 25.5lb on our fuel rail. Still a bit rich but they are easier to adjust using a piggy back and the PCM is happier.

There are a few others injectors that I found that I haven't tried yet but look like they would make a good fit. 0-280-155-934/ 53031740AA from a 00-03 3.8L Dodge truck should flow 25lb on our rail, but they are single hole. But I have heard that the modern single holes are better than the past 4 holes.

0-280-156-162/ 3M6G-BA off a 04-09 Ford Focus/Fusion/Escape 2.0L-2.3L should flow 24.2lb on our rail. They have 4 holes.

0-280-156-161/ 3S4Z9F593AA; 3S4G-AB from a Ford 03-07 Focus/Fusion/Milan 2.3L/2.0L (nor sure if the year overlap is correct or not on these) should flow the same 24.2lb as the ones prior, but are said to be 12 hole, don't know if that is true or not.

I haven't tested any of those and its been a while since I have looked into it, but they might not even physically fit. But the flow ratings look like a pretty good match.

In searching you also want to keep in mind that we need the high resistance injectors.

Here are some good links:
http://users.erols.com/srweiss/tableifc.htm
http://www.surplustraders.net/specs/yb004.php
http://www.witchhunter.com/injectordata1.php4
http://www.witchhunter.com/injectorcalc1.php4
http://www.export-auto-parts.com/pdf_fi ... ectors.pdf

[gradon]

The older Ford injectors(pre obd-2) with blue tops, metal bases, single pintles and ev1 connectors are rated 24#@39psi. Then they had all blue plastic skinnier injectors that are rated 24#@43.5psi, four pintles, with ev1 connectors, then there are the newer versions still rated 24#@43.5psi, four pintles and ev6 connectors. I've been running lt1 injectors rated 24#@43.5psi(25.5#@49psi) with black tops, silver metal bases, 6-pintles, and ev1 connectors. I tried the ford 24#@39psi(~27#@49psi) and for whatever reason my 96 4.6 didn't like them as much as the lt1s(I should've data-logged them to read the FTs). I would never use stock injectors(cranking up the map voltage with the 96-99 23.2#@49psi gray-tops might work), so would chose an injector that is 27#@49psi over them(even though they might be a tad rich in OL--the pcm will adjust in CL). For most obd2s, a 24#@43.5psi will work fine; for obd1s the 24#@39psi. I know this is against Chris' experience, but I'm not quick to write off a 27# injector, since I have maxed out the PSC1 trying to get my 25.5# down to 12.5:1 afr in 5th at WOT. And I have a 4.6l, so a 4.7l might absolutely need the 27#. 4.5l=12% more air, 4.6l=15% more air, 4.7l=17.5% more air. Jeep used different sized injectors from 19# in the 87-90 renixs, 21# for the 91-95 obd1s, 23.2# for the 96-99 obd2s, then 22.5# for the 00-01s. You want injectors that are 12%-17.5% larger than stock. 4.6 obd2 23.2#x1.15=26.7#; 4.7l obd2: 23.2#x1.175=27.26#.

[shawnxj]

so out of curiousity what are these listed at? f1te-d5a they came out of a fox body mustang( don't know mustangs so not sure what year range that is) and what little searching i did showed they were 24# ev1's