Small Block Forum - EFI to Carb Conversion on 5.0L

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EFI to Carb Conversion on 5.0L

Printed From: The Ford Torino Page
Category: Powertrain Specific Forum
Forum Name: Small Block Forum
Forum Description: 221, 255, 260, 302 and 351W engines
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=17970
Printed Date: 19-April-2024 at 2:12AM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com

Topic: EFI to Carb Conversion on 5.0L

Posted By: fordpower
Subject: EFI to Carb Conversion on 5.0L
Date Posted: 16-April-2019 at 4:16AM

For a 1990 Mark VII 302 HO, what problems or changes do I run into changing back to carb from injected on this HO 302 1990?

Replies:

Posted By: Rockatansky
Date Posted: 16-April-2019 at 11:55AM

a guy that has the knowin of a lot of things says the EFI cam may not give good carb signal

https://www.tapatalk.com/groups/clevelands/the-hesitation-from-hell-heeeeeelllllp-t15467.html" rel="nofollow - https://www.tapatalk.com/groups/clevelands/the-hesitation-from-hell-heeeeeelllllp-t15467.html

https://www.tapatalk.com/groups/clevelands/no-traction-yay-was-hesitation-from-hell-t15525.html" rel="nofollow - https://www.tapatalk.com/groups/clevelands/no-traction-yay-was-hesitation-from-hell-t15525.html

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72 GT Ute

Posted By: 72FordGTS
Date Posted: 16-April-2019 at 12:10PM

Besides the possible cam issues you may see that Rock mentions, there are a number of other parts you need. You'd need an new intake, and distributor. You could use a low pressure electric fuel pump for the carb, but if you convert to a mechanical pump you need a new timing cover, and possibly a fuel pump eccentric.

There are some kits online that include some of the parts like this one that includes and intake and carb:

https://www.ebay.com/itm/Ford-Mustang-5-0-liter-cid-302-conversion-kit-EFI-to-CARB-INTAKE-DISTRIBUTOR-/261853106048" rel="nofollow - https://www.ebay.com/itm/Ford-Mustang-5-0-liter-cid-302-conversion-kit-EFI-to-CARB-INTAKE-DISTRIBUTOR-/261853106048

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Vince

1972 Ford GTS Sportsroof - Survivor, One Family car

GTS.org Admin

Posted By: fordpower
Date Posted: 17-April-2019 at 2:37AM

Well that read was way over my head. Guess I will wait until I get the car home. Evonne wants to know how I expect to work on car when I can't lift a 5 gal can of gas.

Posted By: Big Bird
Date Posted: 17-April-2019 at 9:03AM

Are you trying to swap the engine into something else, or run the Lincoln without the EFI?

Two very different sets of issues.

For swapping the engine:

EFI cam will work just fine. mine got swapped to a E303 cam, because it was available, but was originally running the factory GT cam just fine.

Timing cover will need replacement.

You can use a distributor with a steel gear (85 mustang GT with 5-speed for a source).

Engine may or may not have a fuel pump eccentric, or only the inner half of a 2-peice eccentric.

Eliminating EFI on the Lincoln, you will add computer complications, transmission control issues, emission issues, etc.

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"What we do in full frontal view, is more honest than your cleaned-up mind."
Randy
1979 T-Bird
2005 F-150 STX RCSB 4.6, 3.55 LSD
How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds?

Posted By: fordpower
Date Posted: 17-April-2019 at 10:37AM

It is suppose to be going in my pinto. Though maybe carb would be easier than figuring the computer mess. time will tell. If not for the org owner stripping out all the wiring dash and all it is a rust free car.He even replaced air ride with reg coils.

Posted By: russosborne
Date Posted: 18-April-2019 at 6:14PM

You will need a carb, a carb intake, and a non EFI distributor for sure.

You will need an old style timing cover and fuel pump eccentric on the cam if you want to use a mechanical fuel pump. Not needed for an electric pump.

If you don't want to keep the serpentine belt system you will need all the accessories and mounts for the V belt set-up.

I'm putting an 89 5.8l (351W) in my 79 Pinto. I'm using the serpentine belt system and an electric fuel pump.

Russ

Posted By: fordpower
Date Posted: 19-April-2019 at 4:12AM

Keeping the serpentine. 351 w that's a tight fit no room for headers with 302.

Posted By: russosborne
Date Posted: 19-April-2019 at 4:29PM

They do make headers for both the 302 and the 351w swap. Have to cut the fenderwells, but I don't have the fenderwells anyway. Hoping I don't need them. Not cheap.
These are for the 351w.
https://www.summitracing.com/parts/hok-6163hkr/year/1979/make/ford/model/pinto" rel="nofollow - https://www.summitracing.com/parts/hok-6163hkr/year/1979/make/ford/model/pinto
Summit has the ones for the 302 also.
Russ

Posted By: fordpower
Date Posted: 20-April-2019 at 6:06AM

I feel they are ugly