Carburetor For 4.6?
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Old April 6th, 2008, 09:13 PM   #1
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Carburetor For 4.6?


I talked to a performance shop in my area and they were telling me that for 4.6L mustangs the best to make out performance and save money is to go carburetor? Would anyone have by any chance done this switch already? How much HP did you gain?. They said the Parts for the Intake manifold, carburetor, fuel pressure regulator, new fuel pump, and braided lines would be around 1500 w/out labor instead of the injectors, tuners, maf sensor, fuel pump, regulator, rails, tb, plenum for fuel injected? would you gain more hp on carb or fuel injected?
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Old April 6th, 2008, 09:37 PM   #2
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Is the shop willing to trade your EFI stuff for the carb stuff? if so it wouldnt be a bad idea,but if you got to give em 1500 bucks plus labor its not a good idea.

i dont think its really worth it since EFI is more efficient.If you are going for the cool factor of having a carb system on your 4.6 go for it. you are probably going to lose some torque in the process though.
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Old April 7th, 2008, 09:25 AM   #3
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are you joking?
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Old April 7th, 2008, 11:53 AM   #4
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EFI >> Carbs.
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Old April 7th, 2008, 11:43 PM   #5
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but how much is it to tune and injectors and all the computer stuff?
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Old April 8th, 2008, 08:01 AM   #6
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How is EFI more efficient? Maybe as far as fuel mileage but I wouldn't say its better as far as HP and Torque.
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Old April 8th, 2008, 08:42 AM   #7
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why would anyone spend that much money to convert to a stupid inferior induction system. EFI is a much smarter system. Spend that money on if you dont have a full pi swap get that, or a driveshaft, Dont do carb. Efi is so much easier, carbs are fucking pains in the ass especially if your year round driving.
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Old April 8th, 2008, 10:30 AM   #8
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Originally Posted by 1BADSTANG View Post
why would anyone spend that much money to convert to a stupid inferior induction system. EFI is a much smarter system. Spend that money on if you dont have a full pi swap get that, or a driveshaft, Dont do carb. Efi is so much easier, carbs are fucking pains in the ass especially if your year round driving.
Well, that has got to be the most uneducated statement I have ever read on this site!
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Old April 8th, 2008, 10:41 AM   #9
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EFI - more expensive, can be tuned better than carb in any and every circumstance with the right equipment and experience.

Carb - cheaper, much easier to tune. Aside from cold / hot weather driveability it can get really close to what EFI can offer, though it would never - ever be as tuneable.

There's really good reasons to go with either. You shouldn't knock someone for going in either direction - to each their own. My suggestion is though, that unless you're buiding a 700hp+ monster and you want to drive the car on the street often, you'd be better off keeping it fuel injected. I saw a nice carb'd setup once, really envious of it but realistically it's much easier to just keep it EFI since you're already there.
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Old April 8th, 2008, 11:33 AM   #10
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Originally Posted by ujslost View Post
Well, that has got to be the most uneducated statement I have ever read on this site!
I disagree.

I think carb tuning is an art while EFI tuning is a science. If you go carbs, keep that screw driver handy! I hope you live in a warm area too!
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Old April 8th, 2008, 12:10 PM   #11
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Originally Posted by ujslost View Post
Well, that has got to be the most uneducated statement I have ever read on this site!
Explain to me why you would take a perfectly good efi system and change it to a carbuerator when you can put those thousands into what will actually make the car fast. Mr. Educator
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Old April 8th, 2008, 12:11 PM   #12
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Originally Posted by Trick Tuners View Post
I disagree.

I think carb tuning is an art while EFI tuning is a science. If you go carbs, keep that screw driver handy! I hope you live in a warm area too!
Right because if you tune it in 70 degree weather, the first 30-40 degree day your car isn't going to run correct.
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Old April 8th, 2008, 02:33 PM   #13
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I wouldnt change EFI to carb unless I were looking for huge power. I think larger power can be had easier with a carb. Thus the reason Nascar and other sanctions use carbs still ! And going from EFI to carb doesnt cost thousands of dollars. You will spend thousands just modifying the fuel and air induction on an efi. Then you have to have a tune for OBD II systems so there is another $500, and add nitrous or a supercharger and then need a dyno tune well there is more money. If you can adjust a carb, and can have a wideband o2 sensor and an adjustable FPR and gauge then you can tune your carb unlimited without an electronic tuner or a dyno.
Which is more user friendly and street friendly EFI for sure. But no I wouldnt take an EFI car and swap it to Carb unless I planned on making upwards 900hp.
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Old April 8th, 2008, 05:45 PM   #14
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Originally Posted by ujslost View Post
I wouldnt change EFI to carb unless I were looking for huge power. I think larger power can be had easier with a carb. Thus the reason Nascar and other sanctions use carbs still ! And going from EFI to carb doesnt cost thousands of dollars. You will spend thousands just modifying the fuel and air induction on an efi. Then you have to have a tune for OBD II systems so there is another $500, and add nitrous or a supercharger and then need a dyno tune well there is more money. If you can adjust a carb, and can have a wideband o2 sensor and an adjustable FPR and gauge then you can tune your carb unlimited without an electronic tuner or a dyno.
Which is more user friendly and street friendly EFI for sure. But no I wouldnt take an EFI car and swap it to Carb unless I planned on making upwards 900hp.
Ok so good call on the most un-educated post on these forums, because he literally JUST posted it was going to cost 1500 WITHOUT LABOR.
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Old April 8th, 2008, 06:23 PM   #15
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And an aftermarket 4.6 intake both upper and lower, larger TB and mass air and then a CAI, a tune and larger injectors are gonna cost over $1500? So what is your point?
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Old April 8th, 2008, 06:33 PM   #16
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Id say its probably safe to say that 99.999% of the high powered carb guys trailer their cars to the track and only care how it drives at WOT. If this is your goal, the carb will do just fine. Remember you will need a new fuel pump, and a return style system to go with a carb. This can run up to $1000 too. You can make gobs of power with EFI and still have a car with decent street manners. Simply switching from a properly tuned EFI setup to a properly tuned carb setup with no other changes will net 0 hp. Hopefully you never need to smog the car too because it wont pass. There is a reason that cabs and distributors are no longer used on new cars.
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Old April 8th, 2008, 06:47 PM   #17
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Originally Posted by Trick Tuners View Post
Id say its probably safe to say that 99.999% of the high powered carb guys trailer their cars to the track and only care how it drives at WOT. If this is your goal, the carb will do just fine. Remember you will need a new fuel pump, and a return style system to go with a carb. This can run up to $1000 too. You can make gobs of power with EFI and still have a car with decent street manners. Simply switching from a properly tuned EFI setup to a properly tuned carb setup with no other changes will net 0 hp. Hopefully you never need to smog the car too because it wont pass. There is a reason that cabs and distributors are no longer used on new cars.

Right so why spend thousands on an inferior street induction system when you have a perfectly smart EFI system that does a great job
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Old April 12th, 2008, 01:53 AM   #18
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well first yes i do live in a hot area in south texas about 30 miles from mexico near south padre if anyone has spring breaked there. and well i finally got my mustang as my second driver because my brother finally bought a car and i have my old high school car back. i'm more than likely gonna just garage my stang as a weekend driver or full out race car. i was only thinking that to go all out the efi will cost 300 for injectors, 400 tuner, maf sensor for new injector 200, fuel pump 200, fuel regulator 150, lines 150. and well i know more about carberators and are more simpler to tune and most of my style is old school as far as distrubuted and carberator. i think i have to get a msd dis system but that would be still with the price for the $1500 there was a guy with this mod on their mustang here at our track and was running from 12.9s to 13.2s and wasn't modded much. the only thing is that its hard to find them money trees. thanks for all theinfo and i'll probably go with the carb but first do the pi swap. right now i have the cams and intake but when you swap to pi intake what was needed as far as gasket or silicone?
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Old April 12th, 2008, 03:51 AM   #19
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ive never had problems with my car going from 100 degree weather to 40 degree weather..........
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