what size injectors?

Chipdog · 02-12-2002, 08:35 AM

I have a cobra intake sitting here that I am waiting to get some heads before I install it. I figure between the two and all the other crap I have I don't think the stocker injectors will have what it takes. Can you go too big with injectors? I have a FMU on the car now and there is a AFPR on the way. Do I need both? I am not going to go too crasy with the heads I am thinking more of just some ported stock ones due to money issues.

Thanks for the in put
Chip

Rebel79 · 02-12-2002, 11:00 AM

First off with a blower combo, 19lb injectors is not really safe. If you are still going to run the stock cam, I would recommend 30lb injectors with 9psi of boost. You will need to recalibrate your FMU to 6:1 and possible drop your fuel pressure to about 38psi or so. You can get recal kits from Vortech (expensive) or from a place like Houston Performance (cheap). Its really easy to recalibrate. I actually wrote an install article for StangNet a while back for injectors and FMU recal.

I won't link to it though for obvious reasons.

avbcon12 · 02-12-2002, 11:08 AM

if you are just going with ported E7's the motor wont be needing more than what you have. the 19# injectors are good for over 300 HP and with E7's you wont be making more than that. although if you feel different, i have a brand new 24# bosch set i need to get rid of. i dont think you need them just yet though.

adam

91GTturbo · 02-12-2002, 02:39 PM

I think Adam may have missed that your car is blown. 30's minimum would be my choose for your combo. I run 30's now with no fmu and have no problems, I'm also adding heads and I'm going to stick with them. And I also plan on running 15 lbs on race gas with them.

avbcon12 · 02-12-2002, 02:41 PM

OH YEA! sorry about that, i didnt see you had a blower. i would go with 30#'s too.

take care,
adam

Chipdog · 02-12-2002, 11:11 PM

Cool so I go with the 30s
But with the Adjustable Fuel pressure regulator should I take off my FMU?

02-12-2002, 08:35 AM	#1
Chipdog Registered Member Join Date: Apr 1999 Location: Miami,Fl USA Posts: 297	what size injectors? I have a cobra intake sitting here that I am waiting to get some heads before I install it. I figure between the two and all the other crap I have I don't think the stocker injectors will have what it takes. Can you go too big with injectors? I have a FMU on the car now and there is a AFPR on the way. Do I need both? I am not going to go too crasy with the heads I am thinking more of just some ported stock ones due to money issues. Thanks for the in put Chip __________________ 92 GT Convertible Hooker Headers, Headman X pipe, Flow Masters, 4.10s, BBK 1.5 drop, 73mm Mass air, 65 FMS TB, FMS Aluminum radiator, T-5 swap with a Steeda shifter. And a 9 pound Blow Job

02-12-2002, 11:00 AM	#2
Rebel79 News Editor Join Date: Apr 1999 Location: Concord, CA Posts: 2,101	First off with a blower combo, 19lb injectors is not really safe. If you are still going to run the stock cam, I would recommend 30lb injectors with 9psi of boost. You will need to recalibrate your FMU to 6:1 and possible drop your fuel pressure to about 38psi or so. You can get recal kits from Vortech (expensive) or from a place like Houston Performance (cheap). Its really easy to recalibrate. I actually wrote an install article for StangNet a while back for injectors and FMU recal. I won't link to it though for obvious reasons. __________________ Scott Halihan, News Editor The MustangWorks Magazine 1994 Supercharged Mustang Cobra Rebel Racing. Home of Bay Area Mustangs

02-12-2002, 11:08 AM	#3
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	if you are just going with ported E7's the motor wont be needing more than what you have. the 19# injectors are good for over 300 HP and with E7's you wont be making more than that. although if you feel different, i have a brand new 24# bosch set i need to get rid of. i dont think you need them just yet though. adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

02-12-2002, 02:39 PM	#4
91GTturbo Registered Member Join Date: May 2001 Location: Valdese, NC Posts: 361	I think Adam may have missed that your car is blown. 30's minimum would be my choose for your combo. I run 30's now with no fmu and have no problems, I'm also adding heads and I'm going to stick with them. And I also plan on running 15 lbs on race gas with them. __________________ 91 single turbo vert

02-12-2002, 02:41 PM	#5
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	OH YEA! sorry about that, i didnt see you had a blower. i would go with 30#'s too. take care, adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

02-12-2002, 11:11 PM	#6
Chipdog Registered Member Join Date: Apr 1999 Location: Miami,Fl USA Posts: 297	Cool so I go with the 30s But with the Adjustable Fuel pressure regulator should I take off my FMU? __________________ 92 GT Convertible Hooker Headers, Headman X pipe, Flow Masters, 4.10s, BBK 1.5 drop, 73mm Mass air, 65 FMS TB, FMS Aluminum radiator, T-5 swap with a Steeda shifter. And a 9 pound Blow Job

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