91 efi to carburetor swap

[charms123]

Hey guys my name is Chris and I'm new to the club I'm having a lot of trouble getting my 91 gt to run right with the efi setup thinking about converting to carb set up. I was just wondering what parts I need for the swap and if anyone has done it. Already have manifold cafburetor and distributor for conversion what else if anything am I gonna need? Thanx for any input guys need to get this thing running so I can get to some meets lol

​

 

[dsblk93gt]

Welcome! What problems are you having? I personally would try and chase down the issues with the EFI and keep that due to the fuel mileage and better over all driveability.

 

[Mnirishjr]

fuel mileage and better over all driveability.

Sorry bro but i gotta give ya a

If your into good fuel milage your in the wrong hobby for 1 and mine is not much different than my old efi's.... 2 my carb driveabilty is better than most efi Mustangs around. NO hunting idle NO bucking No surging NO cel's

Charms i went carb after multiple efi setups! Why... something new, clean engine bay, less weight, less headache... I idle like a frigin champ, you feel more connected to the car (more responsive). A screwdriver and a vac gauge is all you need to tune...
NOTE: It is not cheaper, a good carb setup costs money! Dont go cheap on the carb or fuel system! Wiring is easy after a little bit of internet seaching.

 

[92BIGREDBEAST]

Sorry bro but i gotta give ya a

If your into good fuel milage your in the wrong hobby for 1 and mine is not much different than my old efi's.... 2 my carb driveabilty is better than most efi Mustangs around. NO hunting idle NO bucking No surging NO cel's

Charms i went carb after multiple efi setups! Why... something new, clean engine bay, less weight, less headache... I idle like a frigin champ, you feel more connected to the car (more responsive). A screwdriver and a vac gauge is all you need to tune...
NOTE: It is not cheaper, a good carb setup costs money! Dont go cheap on the carb or fuel system! Wiring is easy after a little bit of internet seaching.

there bat man. Why did Ford make mustangs FI instead of the beat carb speed density set up? :smash: You must not have a good tuner if your haveing all those problems. And for Fuel mileage with a 4 barrel carb...:smash: Sorry Atari, you have been mislead about FI set ups....

 

[Mnirishjr]

You must not have a good tuner if your haveing all those problems.

What Problems I didnt say "I" had problems :smash: I stated common efi issues of people than cant afford good tuners or have no tuning knowledge!

And for Fuel mileage with a 4 barrel carb...:smash: Sorry Atari, you have been mislead about FI set ups....

This is wayyy off base. I bet dollars to donuts our fuel milage is about the same! But, as I stated before this is a non-fuel milage hobby lmao. Have you ever experienced a $600 custom carb? Prob not... you cant put it in the same realm as a 70's factory 4 barrel. To do so is ignorant.

To the OP you are going to get a lot of this "hater" mentality towards Carbs.... its in some cases lack of experience. PM me any questions you might have...

Bigredbeast lets have a engine bay shoot out. I bet mine looks a tad bit better than yours My ride is a Show and Go my friend. Bigred I understand you are acting as Dsblk's watchdog lol but i wasent attacking him. I was correcting inaccuate information.

 

[92BIGREDBEAST]

Bigredbeast lets have a engine bay shoot out. I bet mine looks a tad bit better than yours My ride is a Show and Go my friend.

Not a chance pal. You need some more werk done to compete with this set up. 450rwhp and 20+ mpg. FI mind you. Idles perfect all day long. Ill bet you titles that i will smoke you on the street or track. Better put some bigger jets in that thing... LOL
Here is my engine bay with old intake, now has Systemax... Back to the drawing board for you guy! Dont take it personal...

PS Show and Slow for you!

 

[Mnirishjr]

Ill bet you titles that i will smoke you on the street or track.

Okayyy Rich Christensen this aint Pinks lmaooo
fyi 450hp means nada at the track you should know that, and its prob crank hp anyway ... I once upon a time had a "track" car that would make you look silly. My Fox now is the hole package, built with multi facet in mind. You'll get there someday

Im not going to hijack the OP's thread with childish jabs all day. Facts are facts and haters are haters....

 

[Mnirishjr]

I stated common efi issues of people than cant afford good tuners or have no tuning knowledge!

I stand by this statement and the OP's post only compliments my point!!

Charms just PM me

 

[Mnirishjr]

Charms123 I highly recomend you look at Quick Fuel carbs and use thier regulator as well. I also would look at Glen Performance tanks, they are internaly sumped with a bottom feed and top return (amazing custom tanks). I have all the wiring info as well to run the what ever (elec) pump you chose off of the stock wiring harness. I use nothing but Mallory Pumps. Ignition is a hole diff story if you need help with that to let me know.

 

[dsblk93gt]

Sorry bro but i gotta give ya a

If your into good fuel milage your in the wrong hobby for 1 and mine is not much different than my old efi's.... 2 my carb driveabilty is better than most efi Mustangs around. NO hunting idle NO bucking No surging NO cel's

Charms i went carb after multiple efi setups! Why... something new, clean engine bay, less weight, less headache... I idle like a frigin champ, you feel more connected to the car (more responsive). A screwdriver and a vac gauge is all you need to tune...
NOTE: It is not cheaper, a good carb setup costs money! Dont go cheap on the carb or fuel system! Wiring is easy after a little bit of internet seaching.

I am not a "carb hater" , I just don't see the sense in tossing out the EFI which is very capable for a carb when most of the time people do not do the carb setup RIGHT. They cheap out on the carb and everything else. A guy in town did the same thing with his 88 GT 10+ yrs ago and tossed some old ported heads, intake, carb, etc..etc. and then got walked by my all stock EFI motor with minor mods. LOL To do a NICE carbed setup it is not cheap. Try pricing out a good fuel system and then a carb for forced induction. I like EFI and enjoy tuning and the ability to not need to adjust the carb or timing even. I have been there and done that, if I had a classic Stang I'd probably have it carbed.

The whole EFI vs. carb thing has been beating into the ground. I just can't see spending probably $1000+ to swap over an EFI car to carb when it is probably something simple. The EFI on the Mustangs is rather simple and with the right tools very capable. I could save the $1000+ and buy a supercharger or heads LOL. Just looking at this logically.

Carbs can make just as much power but they are not as accurate as EFI and do require tuning often if you want the most out of it. Once you get the EFI all tuned you can leave it and go. If EFI was so bad I doubt everyone would have went to it.

 

[1990_LX]

Spending tons of money to change from EFI to carb or carb to EFI just to avoid fixing what is in the car now doesn't make sense to be. If you're doing a motor swap into a 4 cyl like me or something and want it to be cheaper or easier than I can see but if you already have one or the other...why not fix it? The whole EFI is superior to carbs is also beyond me becasue a well tuned carb, and no not a 15 year old Holley with different jets in it, can definitely be comparable to an EFI set up in both terms of MPGs and driveability. I think it comes down to what you want to do with the car as well as a degree of personal preference.

 

[dsblk93gt]

Spending tons of money to change from EFI to carb or carb to EFI just to avoid fixing what is in the car now doesn't make sense to be. If you're doing a motor swap into a 4 cyl like me or something and want it to be cheaper or easier than I can see but if you already have one or the other...why not fix it? The whole EFI is superior to carbs is also beyond me becasue a well tuned carb, and no not a 15 year old Holley with different jets in it, can definitely be comparable to an EFI set up in both terms of MPGs and driveability. I think it comes down to what you want to do with the car as well as a degree of personal preference.

It can yes, my fathers friend has a well tuned 347 NA that is 400+ hp and it drives great and is reliable. Carbs just don't adapt to weather changes like EFI does, that is probably the biggest advantage of EFI. I like the ability of tuning the injector timing for instance which smooths out the idle with a cam and all the other tricks you have available. I guess it comes down to what you like. On a 2.3 car being swapped I don't think I'd spend the $$$ to go EFI.

 

[1990_LX]

Here's my take, fix what you have because if you want a carb set up that will be comparable to a good running EFI set up, you're going to most likely spend a lot more. If I had an EFI 5.0, I would not be changing it unless it was dedicated drag car or something of the like.

 

[blwn93gt]

I did the conversion on my 88 because i will race more with this car, it gets expensive, i did a Quickfuel pro 680 with a Edelbrock Vic Jr and had the Vic hand ported, had to switch my MSD distributor then change around all my lines and pluming for the fuel, i ran 6AN lines for feed and return with a Aeromotive regulator, after everything, i probably spent close to $2000 for the conversion, i like the set up, but for just driving on the street, stay with EFI, i liked the EFI better for cruises, but like i said, i race alot and thats why i switched over.

 

[DalzFordz]

I have run carbs for over 40 years with pretty good results. The 427 stroker I built for my 95 GT was my first try at EFI and scared me to death. Put it together, hit the key and it ran. It idles, doesnt run rough and performs well. I got a tune up from a fellow NYM member and I love the car. Runs real good, and light the tires at will. Next car will be EFI.

 

[Mnirishjr]

Spending tons of money to change from EFI to carb or carb to EFI just to avoid fixing what is in the car now doesn't make sense to be. If you're doing a motor swap into a 4 cyl like me or something and want it to be cheaper or easier than I can see but if you already have one or the other...why not fix it?

Exactly, i went carb because my build was from scratch. And carb suited my goals better than efi on this build.

The whole EFI is superior to carbs is also beyond me becasue a well tuned carb, and no not a 15 year old Holley with different jets in it, can definitely be comparable to an EFI set up in both terms of MPGs and driveability. I think it comes down to what you want to do with the car as well as a degree of personal preference.

Exactly again well said! Most people want thier setup to seem superior i guess, i dunno.... EFI and Carb both have there pros and cons, Period.

 

[dsblk93gt]

I just think too many people freak when they have an issue with a car that is 20yrs old and blame the EFI. Most of the cars have not had sensors replaced or some have vacuum leaks, etc. How well would a 20yr old carbed car run if never touched? I definitely like both, just in this example I don't see any sense in yanking the EFI off. If I didn't enjoy the tuning aspects of EFI so much it may be different. A well tuned carbed car can/will run just as strong as EFI.

 

[Mnirishjr]

Carbs can make just as much power but they are not as accurate as EFI and do require tuning often if you want the most out of it.

I was jiving with your post untill i saw this.... can you elaborate?

 

[dsblk93gt]

I was jiving with your post untill i saw this.... can you elaborate?

With the OEM efi and tuning you can

-adjust fuel injector timing based on crankshaft rotation in degrees - helping idle with large cams
-adjust fueling & timing based on engine coolant temp and air charge temp allowing better control of fuel at all operating temperatures

 

[dsblk93gt]

BUT...if you don't know someone that can tune or do it yourself it is not an advantage...