Swapping EFI 302 questions??
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Swapping EFI 302 questions??
I have a 79 F-100 with the original 302 but found a 91 Mustang LX 302 HO complete with harness and ECM and would like to know what is need to do the swap. My tranny is a C6 which was recently rebuilt so I'd like to keep it and the EFI motor has a flexplate from the 5 speed so will my original flywheel work?
Also the EFI motor has the stock AC compressor and my truck don't have AC so is there a AC delete kit for that motor? Any info would be greatly appreciated
Also the EFI motor has the stock AC compressor and my truck don't have AC so is there a AC delete kit for that motor? Any info would be greatly appreciated
Hotshot
Joined: Dec 2003
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From: iowa
You can't use the flexplate/flywheels on those engines. The earlier engine has a different inbalance then the later model 5.0 (28oz vs 50 oz) But you can buy a flexplate for the 91 with an auto and use that.
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With that in mind will the C6 bolt up then and what will I do about the kickdown linkage??
Hotshot
Joined: Dec 2003
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From: iowa
You can get the C6 TC to bolt up to a late model flexplate. IIRC the bolt pattern is the same as the AOD.
I know the one that TCI makes says C4 and C6, and the one that Ford makes says C4 and AOD so it appears that the bolt pattern for the TC is the same on all of them.
I know the one that TCI makes says C4 and C6, and the one that Ford makes says C4 and AOD so it appears that the bolt pattern for the TC is the same on all of them.
Elder User
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I'm considering it right now, have all the parts. Just get a kick down cable, wire it all up, listen to monsterbaby. I'm making a mild performance truck, never gonna use it as a truck, so I can't use either of my c6's (c6 soaks up too much HP, and no OD). I'm either gonna run a t-5 or an aod. The OD allows you to make good gas mileage ~or~ put in a high rear gear and crank out a ton of torque. Given the choice, I'd rather have a good gear set than a built motor. The right gears can do wonders.
Laughing Gas
Joined: Dec 2003
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Here's a good thread for deleting the A/C
Belt route smog and AC delete - Mustang Forums at StangNet
As far as the kickdown linkage you might want to see what Lokar has to offer.
Lokar Throttle Cables and Kickdowns
or scour the junkyards for something you could modify.
Don't forget you will need to upgrade your fuel system to a high pressure return setup. Maybe see if the tank (and in tank pump) from an efi F series from the late 80's to 96?? will work. The fuel gauge sending unit will have a different resistance though. It might also be worthwhile to snag the fuel lines from the same truck, as the one's on my 95 are stainless. You may need fuel rails from an Explorer or F series since they attach at the rear of the motor, where as the mustang attaches at the right front of the motor. Or you may be able to modify the lines and make it work on the right.
The upper intake can be rotated so the throttle body is on the drivers side if that would make the throttle linkage work better for you, but you may have to use an intake spacer, and/or swap valve covers from side to side to get things to work better.
Belt route smog and AC delete - Mustang Forums at StangNet
As far as the kickdown linkage you might want to see what Lokar has to offer.
Lokar Throttle Cables and Kickdowns
or scour the junkyards for something you could modify.
Don't forget you will need to upgrade your fuel system to a high pressure return setup. Maybe see if the tank (and in tank pump) from an efi F series from the late 80's to 96?? will work. The fuel gauge sending unit will have a different resistance though. It might also be worthwhile to snag the fuel lines from the same truck, as the one's on my 95 are stainless. You may need fuel rails from an Explorer or F series since they attach at the rear of the motor, where as the mustang attaches at the right front of the motor. Or you may be able to modify the lines and make it work on the right.
The upper intake can be rotated so the throttle body is on the drivers side if that would make the throttle linkage work better for you, but you may have to use an intake spacer, and/or swap valve covers from side to side to get things to work better.
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Hotshot
Joined: Feb 2004
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From: Marengo, Iowa
In order to use the later style pumps and hangers, the tank would have to be modified, as the hole to put it in is too small. You could possibly use an external low pressure transfer pump and secondary high pressure pump like the 87-89 MFI trucks did.
Laughing Gas
Joined: Dec 2003
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If you have a good complete motor and wire harness, then you're way ahead of the game. Keep doing your research and feel free to ask any questions.
You'll also need the alternator from the 91 Mustang as well, since the old alternator from your truck will stress out with the increased electrical load.
Here are a few more good articles to read:
Installing A 1987-93 Mustang SEFI 5 Liter V8/AOD Drive Train into A '61- 79 F100 - F250 Truck .: Articles
Ford Fuel Injection Begining an EFI Swap
Ford Fuel Injection
To save yourself some time and aggrevation, ask yourself what your future goals will be for your motor. If you are planning on using a bigger cam, stroker crank, and bigger heads, and once you go beyond a certain limit, then you may run into issues with the computer not knowing what to do with the additional air flow.
If you want a nice, troublefree, dependable, daily driver that will stay in it's close to stock configuration? Then you will be fine with what you are doing.
You'll also need the alternator from the 91 Mustang as well, since the old alternator from your truck will stress out with the increased electrical load.
Here are a few more good articles to read:
Installing A 1987-93 Mustang SEFI 5 Liter V8/AOD Drive Train into A '61- 79 F100 - F250 Truck .: Articles
Ford Fuel Injection Begining an EFI Swap
Ford Fuel Injection
To save yourself some time and aggrevation, ask yourself what your future goals will be for your motor. If you are planning on using a bigger cam, stroker crank, and bigger heads, and once you go beyond a certain limit, then you may run into issues with the computer not knowing what to do with the additional air flow.
If you want a nice, troublefree, dependable, daily driver that will stay in it's close to stock configuration? Then you will be fine with what you are doing.
Mountain Pass
Joined: Jun 2005
Posts: 237
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about the tank sender when we did our swap sender for the donor tank worked perfectly is actually more accuret than the stock sender was oh and the tank from a 85-90 escorst is a good fits and only 4gal lest than the factory tank and has the right fuel pump in it for the 5L.
hope that info is of some help
hope that info is of some help
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I appreciate everyones help but I'm still debating. Basically I just want a good driver with decent mileage. I'm getting around 9 with my stock 302 (well I have a Edel 4bbl) but I keep my foot out of it. It runs good but EFI is so hassel free to me. I would like to upgrade to a AOD but one step at a time.
Junior User
Joined: Jul 2010
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From: Newmarket, Ontario Canada
I appreciate everyones help but I'm still debating. Basically I just want a good driver with decent mileage. I'm getting around 9 with my stock 302 (well I have a Edel 4bbl) but I keep my foot out of it. It runs good but EFI is so hassel free to me. I would like to upgrade to a AOD but one step at a time.
If you don't want all the ugly factory brackets on the front of the motor you can ditch them and use an older style setup with just alternator and power steering pump like I am. If you do this just remember the water pump spins counter clockwise so set you belt up accordingly.
Lots and lots of good suggestions here and it is something on the easier end of the scale. It may look daunting but you've already got a 302 so it's 99% a matter of loosening and tightening bolts. Well it's all said and done the improvement in driveability and mileage will have you scratching your head asking why you didn't do it sooner! Your mileage is going up markedly too!
As for the answer to daryll1987, an injection swap is possible on an older motor but most likely would be cheaper if you just sourced a 5.0 Stang parts car. With the old motor you'll be into a cam change for sure to get the H.O. specific firing order which could cost you large depending on which cam you pick. The E7 heads on the '87 - 93 Stangs are better than earlier versions but marginally. Don't expect any huge difference in numbers and it's not a difference you would even feel depending of course on the rest of your setup. As the for the basic harness, Mass-Flo makes a really nice piece designed for Cobra kit cars that runs the absolute basics of the system and uses factory Ford connectors. You'll be into making/modifying a fuel system and brackets for throttle cable and kickdown as alconk will but again it's nothing you should shy away from.
Go for it guys! Great change and it's something that can be undone if you want to go back to completely stock
