Where is everyone finding 24# injectors?

[Programbo]

The ones you bought, Missourian, are good for 00+ cause they have the ev6 connectors. They won't work with 99 and under unless you bought adapters.

Hello. How is everyone? This is my first post on the forum as I have always been on the regular XJ ones. I clean and rebuild fuel injectors on the side and just now started looking inot messing with some for "stroker" engines after digging some out of a V-8 Ford and running the part number and seeing it mentioned 4.7 "stroker" as a possible use. Anyway.... Am I to take it from this post that Jeep "stroker" engines are different than regular XJ engines as far as the electronics etc? Because the 0280155849 injectors with the EV-6 connection will work on a normal '99 XJ since they switched to the EV-6 plug late in the '98 model year. (90% of 1998's have the EV-1 though)

[gradon]

98 is the break year and not 99 then? I was under the assumption that 96-99 XJs use the same 23.2# grey tops with ev1 connectors, but I can't say that I've actually worked on a 99 yet.
Per Dino:
'87-'90, ........53003956, ...Black, ........39psi, .................18.6lb/hr
'91-'93, ........33007127, ...Brown, .......39psi, .................21.0lb/hr
'94-'95, ........53030343, ...Tan, ...........39psi, .................21.0lb/hr
'96-'99, ........53030778, ...Grey, .........49psi, .................23.2lb/hr
'00-'01, ........04854181, ...Blue tip, .....49psi, .................22.5lb/hr

[gradon]

Now with Jeep, things could be different with the WJs and TJs compared to the same year XJs(no surprises).

[Programbo]

98 is the break year and not 99 then? I was under the assumption that 96-99 XJs use the same 23.2# grey tops with ev1 connectors, but I can't say that I've actually worked on a 99 yet.
Per Dino:
'87-'90, ........53003956, ...Black, ........39psi, .................18.6lb/hr
'91-'93, ........33007127, ...Brown, .......39psi, .................21.0lb/hr
'94-'95, ........53030343, ...Tan, ...........39psi, .................21.0lb/hr
'96-'99, ........53030778, ...Grey, .........49psi, .................23.2lb/hr
'00-'01, ........04854181, ...Blue tip, .....49psi, .................22.5lb/hr

Hmmm. Not sure where that chart is from. I've looked in literally 1000 XJ engines in the past few years and the black injectors with the blue tips are always in '99's and very rarely but sometimes in '98's . Here's one of the most used charts for standard XJ "upgrade" injectors and you can see the 99-01 fall together and are taking the 784 EV-6 injector.

[WJ 2000]

I got mine from FIC.com, Bill hooked me up W/6 matching injectors @ 26 # for my 4.6 2000 WJ, if you stayed your stock tire set up, your new 4.6 will smoke your tires anytime, but I dont see that, I'm running 33'' KM2's .

[Missourian]

I got mine from FIC.com, Bill hooked me up W/6 matching injectors @ 26 # for my 4.6 2000 WJ, if you stayed your stock tire set up, your new 4.6 will smoke your tires anytime, but I dont see that, I'm running 33'' KM2's .

If you would change differential gear ratio to compensate for heavier wheel /tire and diameter you should return to stock like. I have 35" tires on my Wrangler but have changed the gear ratio from 3.73:1 to 4.56:1 and maintained the stock RPM /Speedometer settings.

[WJ 2000]

I got mine from FIC.com, Bill hooked me up W/6 matching injectors @ 26 # for my 4.6 2000 WJ, if you stayed your stock tire set up, your new 4.6 will smoke your tires anytime, but I dont see that, I'm running 33'' KM2's .

If you would change differential gear ratio to compensate for heavier wheel /tire and diameter you should return to stock like. I have 35" tires on my Wrangler but have changed the gear ratio from 3.73:1 to 4.56:1 and maintained the stock RPM /Speedometer settings.

Thanks I'm working on just that thought'' 4.56.1
Thanks again''

[Kapper]

The Ford Racing blue Cobra 5.0 injectors are rated to flow 24lb/hr at 39psi so that's the flow you'll get at the stock OBD 1 fuel pressure. If your stroker still runs slightly lean with these, there are two easy ways to correct it. One is to increase the injector duty cycle by raising the MAP sensor input voltage (as I did on mine) so the injectors stay open longer. Another is to raise the fuel pressure (AFPR) so that you get a bigger squirt of fuel without altering the duty cycle.
Both methods are only effective in correcting the AFR when the throttle is open more than ~70%. At idle or light throttle cruise/acceleration, the computer stays in closed loop and maintains a 14.7:1 AFR regardless of any changes you make with the fuel pressure or MAP voltage. The only proper way to dial in the AFR is with a wideband O2 sensor.

This is exactly the information I was looking for. Thanks for the help I just ordered the ford racing injectors M-9593-AA302 with hopes that this will provide the correct AFR for my stroker. I was not aware that the common fixes for AFR are only affective above 70% throttle. This leads me to ask why there is not more talk about installing a wideband O2 sensor correct this through the whole spectrum. If I wanted to install a wideband O2 sensor where would I find it? Will it work with the factory OBD1 ECM? Are there other complications or special changes that make this mod difficult or not cost effective? Thanks again for the help.

Oh and how do I measure the AFR in order to determine if the ford racing injectors give the correct AFR or if I need to do further modifications?

[BryGuy]

Thread hijack - So with the '96 4.0 engine I have, what part number 24# injectors do I need?

[Missourian]

Thread hijack - So with the '96 4.0 engine I have, what part number 24# injectors do I need?

Under 96-98 on the chart it lists several part numbers that should get you headed in the right direction. There are Fuel Injector Charts on the web for interchangeability like this one: http://www.fuelinjector.citymaker.com/Motorcraft.html .

[BryGuy]

Thread hijack - So with the '96 4.0 engine I have, what part number 24# injectors do I need?

Under 96-98 on the chart it lists several part numbers that should get you headed in the right direction. There are Fuel Injector Charts on the web for interchangeability like this one: http://www.fuelinjector.citymaker.com/Motorcraft.html .

I thought #24 Injectors were needed for a 4.6L stroker? The 96-98 line on the chart shows #19 Ford & #22.5 Neon's??? I'm sorry.... I'm so new to this and I want to purchase the correct parts.

[Missourian]

I thought #24 Injectors were needed for a 4.6L stroker? The 96-98 line on the chart shows #19 Ford & #22.5 Neon's??? I'm sorry.... I'm so new to this and I want to purchase the correct parts.

If I were curt in my response, I apologies. Your situation is different than mine so talking to folks with your same year range would better help with your trying to determine what injector(s) are best for your application while it is also my understanding that 24# per hour flow rate injectors are desired. I believe that you can use stock 19# injectors rated at lower pressure (psi) to provide at or near 24# per hour flow rate at a higher pressure.

[BDD]

Every engine is different,so the first step is getting a wideband 02,if you can.I ended up with the 0280 155 703 neon injectors in my 98 4.6. I found the ford f2le b2a 24lb I tried ,to be too much for my motor,they were old 1 hole injectors any way,so I was glad they did not work.
I chose a small cam (505 perf stage 1) so i could run light valve springs,for reliability.
I did not port my head,deck my block,or install big valves.
I did use 944 pistons,arp rod bolts,and a 12 wt crank
I think my mild build is the reason the ford injectors were too much for my motor,but I couldn't find out much about them.Im very happy with my motor,and my wideband seems pretty happy with the neon inj. I know i left power on the table,but my motor runs hard,never detonates on bunk 87 octane,and I could not be happier.

[Missourian]

I think my mild build is the reason the ford injectors were too much for my motor but, I couldn't find out much about them. I'm very happy with my motor and my wideband seems pretty happy with the neon inj. I know I left power on the table but, my motor runs hard, never detonates on bunk 87 octane and I could not be happier.

There is where we are trying to get to. Not necessarily squeeze every ounce of power out of the STROKER but a good bit with reliability and longevity being paramount.

Thanks!

[BryGuy]

I think my mild build is the reason the ford injectors were too much for my motor but, I couldn't find out much about them. I'm very happy with my motor and my wideband seems pretty happy with the neon inj. I know I left power on the table but, my motor runs hard, never detonates on bunk 87 octane and I could not be happier.

There is where we are trying to get to. Not necessarily squeeze every ounce of power out of the STROKER but a good bit with reliability and longevity being paramount.

Thanks!

I couldn't agree more. Thanks for the detailed response BDD, that's exactly what I needed to here