I recently upgraded from an 89 XJ to a 99 XJ. In the future I will be Stroking it as I already have a 12 weight crank and con rods, but until then I am trying to do some other mods. On my 89, the best mod I did was put the yellow top ford injector on it, so I am looking to put a set of Ford injectors on the 99. I posted this on Jeep Strokers but have not gotten much of a response yet so I figured I would post here also.
I started by going here: http://www.fiveomotorsport.com/Injector_SetsJEEP.asp Then I also looked on their website and found that those same injectors are used on the 98-03 Windstar 3.8L and 02-04 Mustang 3.8L. So then I went to the Napa Website and got a part number of CBR238772. I then cross referenced and found this site also listing other applications that may work: http://www.dmauto.com/web/dmauto/Catalo ... RB/238772/ (Just showing my homework here for anyone who might be interested) So I set out to the junk yard to find some injectors figuring I'd find a Windstar or Taurus that was unmolested for its "performance" parts. The only thing I found was a 2000 Taurus with the 3.0L engine, which is not referenced on the list, but had the same style injector. I went ahead and pulled them and $5, later had a set of 6 injectors that might work. Ford P/N YF1E-G4B. So then I found this website, which is full of all injector information. http://users.erols.com/srweiss/tableifc.htm It is a very usefull site when looking for injector specs by part number. I am not sure if this excel spreadsheet of the info gathered is going to work, but here goes...
Flow Rating @ Flow @ 43.5 PSI / 3 Bars .52 BSFC - Est. HP Duty Cycle Stan Weiss 7
Part Number lbs/hr cc/min grams /min PSI BARS lbs/hr cc/min 80% 95% Feed Imped Application
ance
XF2E-C4B Black Tip 19.42 204.1 146.8 43.5 3 19.42 204.1 29.9 35.5 EV6 High 2.5l, 3.0l, 3.8l
YF1E-G4B Light Blue 25.9 272.2 195.8 43.5 3 25.9 272.2 39.8 47.3 EV6 High 3.0l
53030778 Grey 23.2 243.8 175.4 49 3.38 21.86 229.7 35.7 42.4 - - 4-2.5l, 6-4.0l,
XR3E 24 252.2 181.4 - - - - 36.9 43.8 - - Ford DOHC 4.6,
P/N 53030778 is the stock injector from Dino's website http://www.jeep4.0performance.4mg.com/tech_specs.html
Now to the question. Taking what Dino said 91-'95 4.0 injectors are rated at 22lb/hr @ 43psi fuel pressure, so at 39psi they flow ( sq. rt.(39/43) x 22.0 = 21.0lbs/hr ), and applying that to the '96-'99 injector I get 23.3lb/hr @ 49psi fuel pressure, so on the YF1E injector I get (sq.rt. (49/43.5) x 25.9 = 27.5 lbs/hr.
This is about 4.3lbs/hr higher than stock. Is this too much to run stock? Will it be ok to use once I am stroked to 4.5L or 4.6L?
Also, when I run the numbers on fiveomotorsports recommended stock replacement, I get 20.6lbs/hr or about 2.6lbs/hr less than stock. Does that make sense?
I am trying to upgrade my injectors on the cheap, so if people don't think that the injectors will work, let me know and I'll get back on the research. How much above/below the stock rating is safe to go? How much will the computer compensate for? Once I figure out some of the years and models of vehicles that will work, I'll post that to help others out.
Thanks
I started by going here: http://www.fiveomotorsport.com/Injector_SetsJEEP.asp Then I also looked on their website and found that those same injectors are used on the 98-03 Windstar 3.8L and 02-04 Mustang 3.8L. So then I went to the Napa Website and got a part number of CBR238772. I then cross referenced and found this site also listing other applications that may work: http://www.dmauto.com/web/dmauto/Catalo ... RB/238772/ (Just showing my homework here for anyone who might be interested) So I set out to the junk yard to find some injectors figuring I'd find a Windstar or Taurus that was unmolested for its "performance" parts. The only thing I found was a 2000 Taurus with the 3.0L engine, which is not referenced on the list, but had the same style injector. I went ahead and pulled them and $5, later had a set of 6 injectors that might work. Ford P/N YF1E-G4B. So then I found this website, which is full of all injector information. http://users.erols.com/srweiss/tableifc.htm It is a very usefull site when looking for injector specs by part number. I am not sure if this excel spreadsheet of the info gathered is going to work, but here goes...
Flow Rating @ Flow @ 43.5 PSI / 3 Bars .52 BSFC - Est. HP Duty Cycle Stan Weiss 7
Part Number lbs/hr cc/min grams /min PSI BARS lbs/hr cc/min 80% 95% Feed Imped Application
ance
XF2E-C4B Black Tip 19.42 204.1 146.8 43.5 3 19.42 204.1 29.9 35.5 EV6 High 2.5l, 3.0l, 3.8l
YF1E-G4B Light Blue 25.9 272.2 195.8 43.5 3 25.9 272.2 39.8 47.3 EV6 High 3.0l
53030778 Grey 23.2 243.8 175.4 49 3.38 21.86 229.7 35.7 42.4 - - 4-2.5l, 6-4.0l,
XR3E 24 252.2 181.4 - - - - 36.9 43.8 - - Ford DOHC 4.6,
P/N 53030778 is the stock injector from Dino's website http://www.jeep4.0performance.4mg.com/tech_specs.html
Now to the question. Taking what Dino said 91-'95 4.0 injectors are rated at 22lb/hr @ 43psi fuel pressure, so at 39psi they flow ( sq. rt.(39/43) x 22.0 = 21.0lbs/hr ), and applying that to the '96-'99 injector I get 23.3lb/hr @ 49psi fuel pressure, so on the YF1E injector I get (sq.rt. (49/43.5) x 25.9 = 27.5 lbs/hr.
This is about 4.3lbs/hr higher than stock. Is this too much to run stock? Will it be ok to use once I am stroked to 4.5L or 4.6L?
Also, when I run the numbers on fiveomotorsports recommended stock replacement, I get 20.6lbs/hr or about 2.6lbs/hr less than stock. Does that make sense?
I am trying to upgrade my injectors on the cheap, so if people don't think that the injectors will work, let me know and I'll get back on the research. How much above/below the stock rating is safe to go? How much will the computer compensate for? Once I figure out some of the years and models of vehicles that will work, I'll post that to help others out.
Thanks
