Should I switch to carb???

[90mustangGT]

I am just getting tired of the whole complicated and picky EFI. One thing I love about the 5.0 Foxbody is the simplicity. I plan to stay all motor, maby spray down the road. It isn't a daily driver and emmisions isn't a real concern. I am thinking I could sell my EFI setup and get enough for a good carbed setup. I'd like to delete all the computer electronics.

I have now Moroso CAI, 76mm C&L MAF, Accufab 70mm TB+EGR, Edelbrock Performer Intake Manifold, 24# injectors, MM/Accufab AFPR, Holley 255lph FP. That's about $1500 worth in EFI parts. Probally be able to sell the whole thing plus the A9L computer with harnesses for a good amount of money. What would be a good price, and should I do it? Would I have to get a different ignition system?

 

[maverick0716]

If you don't mind tinkering with carbs I, then sure I dont' see why not. If you hate all the electronics and its not a daily driver anyway, it might be a good idea. Although, if you ever plan on selling the car, you might want to keep all your fuel injection stuff.

 

[HISSIN50]

if you want to ditch the puter entirely, i think you are gonna have to get a fair amount of other parts. no experience with a swap, just my thinking (for others to talk about).......yep, i think you will need a new ignition..........
good luck with whatever you decide.

 

[281pony]

i believe the main things you need for doing the swap are just the carb, lower intake, fuel delivery (different fuel pump/other stuff?) and a new ignition system.

i might be way off, but i was looking into this a week or so ago and found those seemed to be the main things.

anyone using a carb'd car as a daily driver? i was considering it to clean up the engine bay, and not have to deal with the problems of a cam since i have speed density. combined with some other things, is it really that unreliable/pain in the ass to go over to carb setup?

is there any articles on doing the conversion?

 

[giddyup306]

HELL NO. Man your going back to the dark ages! There's a reason why they got rid of those things long ago. Mainly b/c of emissions and fuel economy. In addition you will need a different fuel pump b/c on a carbed setup your pump is run off the timing chain sprocket. IMHO the only justifiable carbed setup (EFI swap) is for a race car on a tight budget.

 

[Cue-Ball]

HELL NO. Man your going back to the dark ages! There's a reason why they got rid of those things long ago. Mainly b/c of emissions and fuel economy. In addition you will need a different fuel pump b/c on a carbed setup your pump is run off the timing chain sprocket. IMHO the only justifiable carbed setup (EFI swap) is for a race car on a tight budget.

They got rid of carbs because of federally mandated laws. You can get nearly as good mileage from a carburetor and still pass a sniffer test (but not visual, obviously). You would NOT need a different fuel pump. PLENTY of cars out there use an electric fuel pump with a carb. (edit: you'd need a different pump, but not a mechanical pump as giddyup seemed to imply).

Personally, if it weren't for emissions controls i'd have switched from EFI to carb myself. It's a lot cheaper and easier to get power out of a carb setup than it is with fuel injection. I'm not sure exactly what it would take to switch from EFI to carb on a fox body, but it can't possibly be that tough. If you're up to the task and you don't mind fiddling with carbs, i'd say DO IT!

here are a few links that cover this swap:

http://www.jason.fletcher.net/tech/efi-carb/efi-carb.htm

http://www.westsidemustang.com/carb_coversion.htm

 

[Musclecarfan88]

My car is my DD. gas mileage sucks but ive got a heavy foot and i experience full throttle quite a bit. Carbs are much easier to tune. I say do it. if you want to get good gas mileage with a carb, get one with vaccum secondaries and keep your foot out of the gas.

 

[QDRHRSE]

You will need to modify your fuel system, get an intatake,carb, and dist. For the fuel system you can use all the stock stuff, pump too, you'll just need to to regulate down the fuel pressure to 4-7 lbs instead of 38. Also you will need a throttle cable and bracket from a carbed tbird or mustang. Its cake. If you are interested I have a Victor Jr, a speed demon 650, and an MSD dist (which has the gear for the hyd roller cam)- all in almost new shape that I'll let go relatively cheap.

 

[maverick0716]

Mines a daily driver as well.

 

[88stangmangt]

no gonna get good gas milage outta anything if you punch it to the floor none stop.

 

[dastang2]

if you are going to use the stock efi pump or any efi fuel pump, you will need to use an adjustable regulator with a return line that is pretty big since you are cutting the psi down way more than half you will burn the pump out.i did the swap. you can either go 3 ways on the ignition. one is doing a duraspark conversion which means a bit of rewiring. the 2nd is an HEI conversion like i did and a bunch of others at www.fordtrucks.com. it is easy and all you need is a duraspark dizzy,wires,connectors and the gm 4 pin module. it take about 35 minutes to do. the last one and expensive one is an aftermarket ignition which in some cases is not the most reliable choice. you would need to put a bigger fuel line from the tank to the engine since carbs need volume instead of high pressure to operate. you also can buy a electric pump for carbs and leave out the mechanical pump.

 

[90mustangGT]

Thanks for the input everyone. I have the info I need then. So I will need a carb, intake, different fuel regulator, different ignition system, throttle cable, air filter assembly, as well as a few misc. things which go with every project which tend to be the biggest PITA items.

I understand that carbs need tuning, and I don't know jack about carbs, but know some older hot rodders who eat, sleep, breath, and **** carbs. Plus, EFI tuning is a expensive venture. Sorry, but chips, Tweecers, IAC motors, sensors, MAF sensors, calibrations and all just suck sometimes when there isn't anything wrong with your engine, but because the computer is seeing something worng, it just goes ape****. I just wonder if I would gain some HP with a good carbed setup?

I know that if I go with a bottle, carb is alot cheaper and seems to be a better way since carb intakes are made to flow fuel. I don't have that good a bottom end or vaccume with a B cam.

 

[dastang2]

did you get my PM

 

[SmockDoiley]

You can just reuse the existing fuel stuff, but dial the pressure down to 8 max psi. The swap is easy, and as for fuel economy, my 516 rear wheel supercharged stroker got 15 mpg on a 160 mile road trip and that was with a 750 Holley DP. For your car I would recommend a Demon or Holley in the 600-650 range with an Edelbrock performer RPM intake.