Carb to efi

[Foxtoslow89]

Hey guys I'm knew to the forums. Hope I can get some help, I have a 89 foxbody originally a five speed efi car until I put a 460 in her, I went back to a 5.0 and ran a carb for a while, now I'm going back efi and I just got a computer engine harness Maf harness injecter harness, and I wanna know what I need at bare minimum to get it running. I have a custom harness in it now that has it's own fuse box, ignition ect. Please let me know if anyone has any answers for me

 

[Noobz347]

Moved to 5.0 tech.

 

[MikeH686]

Check out rjm injection tech their harness will get you running minus things like sensors computers and o2 sensors

 

[jrichker]

eBay - look for an 89 model 5.0 Mustang EFI harness. They do pop up from time to time.
As of noon Sunday, 18 Nov,2012 there are 4 available. See http://www.ebay.com/sch/i.html?_trk...89+Mustang+5.0+EFI+harness&_sacat=0&_from=R40

 

[MikeH686]

I aactually have one in fair condition if you want it ill sell it to you for 160 plus shipping just needs a computer

 

[MikeH686]

Nevermind i forgot our years wont be interchangeable

 

[Foxtoslow89]

i already have the 89 harness and computer that i just got.. Now i just need to install it but i wanna no what i can get away with not pluging in. i just want too hook up as bare minimum as i can?

 

[MikeH686]

Tab tad egr uhm i cant remember what else

 

[Foxtoslow89]

rjm gave me a great perspective thanks

 

[MikeH686]

Yeah no problem glad to help when i can

 

[Foxtoslow89]

I do have some more questions on my build. Got a 311( 302 60 over). Gt40p heads ported. Will a stock upper and lower intake work ok for me just to get her running decent. And also I was wanting to do a turbo, nothing craZy just something to give her that little pull any opinions on my options??

 

[MikeH686]

I mean you should go to the junkyard and get an explorer intake it willl be better then stock and not be much money for the turbo kit for cheap go with on3 performance but if you would want to piece better quality components check out www.bgturbokits.com

 

[ratio411]

The stock intake setup will work fine until you decide what you want for your final setup....
However, with Explorer GT40 intakes being so common and cheap in the upulls, it couldn't hurt to grab one and use it.
They are far and away better than stock, even if there are some aftermarket intakes that are better...
Get the upper, lower, and TB (throttle body)...

 

[MikeH686]

This ans hwy ratio411 can you help me with this rjm kit?

 

[ratio411]

This ans hwy ratio411 can you help me with this rjm kit?

What do you need?
I have used the "universal" 5.0 kit to install an EFI 5.0 in place of a carb'd I6 in a Fox body Fairmont (same as Mustang, but for 5" longer).
It was easy-cheezy. Every wire in the harness is marked down it's entire length as to what it is.
I am going to use one in my 87 GT just to get rid of the rough stock harness, and make for an easy MAF upgrade.
It only includes the wires you need, and not the extras that come stock... emissions and such.

 

[Foxtoslow89]

What would you say about gasket matching the stock lower and upper? Or should I just get the gt40 upper and lower with the 24 lbs inj. And mass air? My gt40p heads are ported and polished and I'm not sure how good 19lbs inj. Will work with my 311?

 

[ratio411]

What would you say about gasket matching the stock lower and upper? Or should I just get the gt40 upper and lower with the 24 lbs inj. And mass air? My gt40p heads are ported and polished and I'm not sure how good 19lbs inj. Will work with my 311?

What I understand is that the 19s will handle up to 300hp, then you pretty much need 24s.
I also understand that the stock MAF setup will run 24s without issue, but for anything larger you need calibration.
I doubt you'll need 24s with a stock upper/lower intake. I don't know if they are good for 300 hp in any combo?
Someone else might have to chime in on that.

 

[Foxtoslow89]

well ill be honest, just with my 311 and built gt40p heads ill be 300+ so it looks like gt40 is looking a little better at this point then the stock

 

[MikeH686]

Ill have to look but are the instructions easy to understand i just have mine laid out in the bay

 

[ratio411]

Ill have to look but are the instructions easy to understand i just have mine laid out in the bay

I thought it was easy-cheezy.
Between the instructions and everything being labeled, not to mention the plugs only fitting exactly what they are supposed to fit, I don't think it could get much easier.