Ford F55E-A2E blue top injectors

[jsawduste]

What are these ?

Getting some conflicting information. One hand is saying 24 lbs at 40 ish and another is saying 21 lbs at the same pressure.

[SilverXJ]

25 lb/hr @43.5 psi (3 bar)

[jsawduste]

Thanks Chris !!

[Cheromaniac]

What are these ?

Getting some conflicting information. One hand is saying 24 lbs at 40 ish and another is saying 21 lbs at the same pressure.

x2 on what Chris said.
Those injectors are rated to 24lb/hr @ 39psi so they'll flow 25.3lb/hr (262cc/min.) @ 43.5psi and 26.9lb/hr @ 49psi.

[jsawduste]

Again thanks guys. On another forum was a guy whom was just about ready to throw in the towel in making his stroker run right.

Fixed a pinched return line, rephased the dist. and found a broken injector connector. He claimed to have Mustang injectors but knowing that many of the Mustang injectors were 19 lbers I had him get the numbers and wanted to run the info past you guys.

Thanks much !!

[Cheromaniac]

many of the Mustang injectors were 19 lbers

The 19lb'ers were orange top and fitted in the '86-'95 5.0L GT.
The blue 24lb'ers were fitted in the 5.0L Cobra.

[6TIME]

Ditto, Pretty much any factory ford injector that's some shade of blue is 24lb @39/43.5psi depending on the era.. There are a few different nozzle types to watch for tho. Most of the Ford 302 19# injectors are orange top, car or truck. The 460 Ford also has blue tops in that same time frame. There should also be a 9 or 10 digit Bosch part number on the injector that might get more hits for you when you look it up..

Here's a good info site that I've used in the past for looking up injectors.
http://users.erols.com/srweiss/tableifc.htm

[SilverXJ]

He claimed to have Mustang injectors but knowing that many of the Mustang injectors were 19 lbers I had him get the numbers and wanted to run the info past you guys.

The source of the injectors is also important. If they were purchased from a salvage yard or used off ebay there is a good chance they sat for a while with fuel on them.

There should also be a 9 or 10 digit Bosch part number on the injector that might get more hits for you when you look it up..

Its a Delphi unit.

[jsawduste]

The engine is running pretty good now as I understand it.

They were running at 32 psi and I had them bump it to 42. Which based on their factors it may be a bit fat now. You guys have been kind enough to educate me on the blue tops, thanks again.

Issue at present is almost an immediate loss of FP on shutdown. This weekend they are going to try a couple tests to help determine where the pressure is being lost.

[SilverXJ]

What year is the Jeep in question? What has been done to the fuel system? Its probably a bad antidrain back valve going faulty. IIRC its located in the pump, but one may also be in the FPR.

[6TIME]

Its a Delphi unit.

Denso u mean?

[SilverXJ]

Yeah, thats it. The other D

[jsawduste]

What year is the Jeep in question? What has been done to the fuel system? Its probably a bad antidrain back valve going faulty. IIRC its located in the pump, but one may also be in the FPR.

Its a YJ and supposedly the pump is fresh. Also a new Hesco FPR. The owners were going to try a couple things and see.
One test was to pinch off the return line. Beyond that I don`t know what they were going to do.