changing from fuel injection to a 4 bbl

[drtbiker]

l have a 1987 5.0 GT with the EFI system. I'm looking to swap in a 345 horse 302 GT-40. instead of using the fuel injection system, lm changing to a 4bbl. the trans is a T-5 manual. will l be able to swap the motor in, connect the wiring to the guages, and go? or is the transmission computer controlled in any way? is a GT-40 plug and play? are there any parts of the car that run off the computer other than the engine?

thanks

[gtsr515]

First of all why are you going backwards 20 years to a carburator.

Secondly, you will have to completely change your fuel system, as the EFI uses high pressure with injectors and an electric pump.

The computor will no longer be valid in any capacity, as it controls many EFI related things, so you wont be able to use that.

[1BAD89]

Personally, I wouldn't switch from FI set-up to a carb, unless it was a drag car only. You can swap in a GT40 crate motor with your fuel injection and you'll be just fine, get wayyyyyy better gas mileage, be more reliable, and it'll run better, etc..... Fuel Injection is a better deal all around.

[drtbiker]

ok what else do i need-
-24lbs injec. $250.00
-upper and lower intake $500.00
-flash computer $300.00
-fuel rails $250.00
-speed density to mass air $700.00
-fuel pressure reg $100.00
vs.
-carb $450.00
-intake $250.00
-fuel pressure reg $100.00
-air cleaner ***. 120.00
$2100.00 efi vs $920.00 carb
which way to go ????
how much money ???
please help??????
the motor is at this link
http://www.thefordsource.com/store/m..._302_345HP.pdf

[bosco]

The carb is less money and an easier way out. I went that route, ive had a carb on my daily driver for a little over a year now. Its pretty nice because there is more room under the hood, less crap to worry about parts wise. But to be honest with you, im switching to EFI within a few months. while a carb can be nice, i shouldnt have to tune it every morning before i go to work to get max performance out of it. I just want something that runs efficiantly and consistang. Im not gettin that with a carburator. to me i think spending the extra money is worth it, but thats just me.

[red82gt]

For the carb swap, don't forget a new electric fuel pump $100, fittings and lines and a tank pick-up $75, a new distributor $150, and an ignition module to replace the TFI that needs the computer, $140. Believe me, you'll find a bunch more parts you'll need as well. I'm not sure if your guages will work but I think they will, but if you want to remove the wiring from the fuel injection you're gonna have to do a bunch of cutting to get everything to work.

[drtbiker]

honestly can some one please tell me almost everything i need and how much it will cost!!!
Thanks,

[Ponycar_302]

Carb is the way to go. It's no longer 20 year old technology. You did the math yourself, so you know it's cheaper. Get yourself an Edelbrock 600CFM and a vaccum gauge and you'll be fine. If you decide to go with Holley get a manual from Haynes. They are sold at any parts store.

[drtbiker]

Pony do u have a carb set up if so what did u do how hard is it to swap efi to carb?
thanks

[Ponycar_302]

I have an 85 GT, so it was already carbed when I got it. I don't know what you'll need for the swap.

[red82gt]

I'll give it a shot, I was going to go the opposite way but when I added everything up it wasn't cheap, to go carb shouldn't be quite as bad, here goes.

1. Tank pick up-you may be able to get away with taking out your fuel pump assembly and jamming a piece of 3/8" aluminum fuel line in place of the stock line and siliconing it in place.

2. 4ft of -6 AN push-lok hose or braided hose. $8-push-lok, $14 braided.

3. Roll of 3/8" aluminum tubing, $25

4. Various fittings for the fuel line (I can give you a complete list if needed) $45

5. Holley blue pump with regulator $98

6. Fuel filter (spliced into the push-lok hose $10)

7. Carb of choice, for fun Speed Demon 650, Mech secondaries
$439.00

8. Intake of choice, Edelbrock Performer RPM Air Gap $229.95

9. MSD 6A box $140

10. MSD blaster 2 coil $34.00

11. MSD distributor with vacuum advance $259.95

12. Throttle cable and bracket $10-Junkyard.

13. K&N Air cleaner $119.95
$1417.95
All the other costs I can think of you'd still have with any engine swap. You could save quite a bit of money by going with lesser parts such as an 85 rollercam distributor, non-air gap manifold, edelbrock, carter, or many other carbs that'll still perform great.

With an edelbrock 600cfm man. choke, rpm manifold, K&N filter in stock dual snorkel air cleaner, and an Accel distributor it would be:
$903.80

You'd definitely save money over fuel injection doing it this way, I was just making sure beforehand that you knew to include the items I listed, just remember that they don't run well when cold, they tend to be jumpy until they are warm and they don't have the low end punch of the fuelies. City mileage is sketchy but out on the highway I get 25+mpg. The top end power will make you smile though. Good Luck and let me know how it turns out.

[drtbiker]

How much and what else do i need to keep it EFI

[Oldschoolpony]

you could always go with the throttle body injection kit, i heard they were pretty good, kinda in the middle not a carb and not efi..lol........... I'm sticking with my 750 Barry Grant

[red82gt]

Edelbrock has a brand new Multipoint FI conversion using an RPM manifold. If it's priced the same as their chev system it should be about $1800 with all the necessary parts. It even has a control module so you can tune it, I'd go to edelbrock and ask for some info.