92 mustang EFI to carb swap.

Bowman66 · July 31st, 2010, 01:24 AM

Im currently goin thru the process of switchin my 92 5.0 over to carb set. I bought a new Edelbrock RPM airgap intake and a complete MSD ign. setup.

i have Ran into a few snags so far a few bolts broke off into the heads while taking the lower intake off. Seeing as how the motor has 150k on it i wasnt shocked.
So i picked a 90 302 ho motor with 66k to replace mine with for now. I was just goin to swap the heads but figured this would give me the chance to clean up the firewall and engine bay. ANy suggestions on how to smooth out the firewall?? Pulled the motor out tonight goin to start on cleaning the engine bay up etc tomorrow. Few ?s will my flywheel and balancer work on the 90 motor fine? dunno if they change the weight at all or not. what should i use to plug the EGR holes n the back of the heads? for now the original motor will b put on the stand and eventually be rebuilt with alot of xtra goodies =-) n ready to go back in over the winter.

Bowman66 · July 31st, 2010, 01:25 AM

FastStang91Lx · July 31st, 2010, 03:28 AM

Smoothing out the firewall requires welding plugs in all the holes, and then bondo, primer, and paint. Yes, your flywheel and balancer will work. They are the same. Plugging the egr passage in the heads is easy... go to the local hardware store with the equalizer tube and get the same size bolt. Sorry, don't remember the size off hand.

BTW.... Why would you ditch the efi???

Timm10221 · July 31st, 2010, 10:31 AM

^^ Ditching EFI seems to be a growing trend..

horsepowerjunkie · July 31st, 2010, 11:04 AM

WHY, WHY, WHY? This is 2010 People!!!! Carburators are for lawn mowers & Race Cars!

AdderMk2 · July 31st, 2010, 12:29 PM

Originally Posted by horsepowerjunkie

Carburetors are for lawn mowers

fixed it for you.... EFI is far superior to carbs in EVERY way. end of story.

holset35 · July 31st, 2010, 05:32 PM

cause it is cheaper see the price of efi parts then u have to get tuned hope the tuner knows what he is doing.

AdderMk2 · July 31st, 2010, 05:46 PM

Originally Posted by holset35

cause it is cheaper see the price of efi parts then u have to get tuned hope the tuner knows what he is doing.

I know what i'm doing.... so thats not a good excuse to me.

plus, the EFI setup is far more detailed in the control that it gives you. When I go from track to track, I dont have to re-tune for DA, like carb runners do

Bowman66 · July 31st, 2010, 06:09 PM

I just dont have the patients to chase down sensors etc when shit goes on. WIth a car thats almost 20 years old sensor start goin bad left n right. Two it is way cheaper then buying injectors, bigger mass airflow etc. Its really just way simpler to tune a carb then a EFI setup for me seein as how I dont have alot of experience with tuning the EFI . thanks for the info fast stang. I figured that would be the best way to smooth out the firewall.

holset35 · July 31st, 2010, 08:21 PM

Originally Posted by Bowman66

I just dont have the patients to chase down sensors etc when shit goes on. WIth a car thats almost 20 years old sensor start goin bad left n right. Two it is way cheaper then buying injectors, bigger mass airflow etc. Its really just way simpler to tune a carb then a EFI setup for me seein as how I dont have alot of experience with tuning the EFI . thanks for the info fast stang. I figured that would be the best way to smooth out the firewall.

Point made all the guys i run with that have any real power have carb set ups so tuning a carb is free

MustangMatt96GT · August 1st, 2010, 12:23 AM

Both have thier advantages... I personally like the carb route because of the flexablitiy with a jet kit, blocked off power valves, a screw driver and knowing how to read a spark plug...

For a DD that was just that something to drive to and from work, i would stick with an EFI setup... My car can be DD just fine, but is more of a race car.

86_Notch · August 1st, 2010, 07:55 AM

Check it out

YouTube - 93 Mustang EFI to Carb swap

.

FastStang91Lx · August 1st, 2010, 09:09 AM

I'm gonna call BS on that. Obviously the car WAS NOT tuned properly with the EFI, but also, when they switched to carb, IT GAINED AN ELECTRIC WATER PUMP!!! And who knows what else was changed in the process.

fogged306 · August 1st, 2010, 09:37 AM

That video is not accurate at all. For starters, what intake did they put on with the carb swap? That alone could have been worth a good chunk of the gain, because the 2 piece intake was probably choking that motor to begin with. Look at the powerband for that engine. I'll bet they put a single plane intake on it and thats what woke it up. I'll also agree that that EFI car probably wasn't tuned properly to a small degree. And, if you had a cam optimized for EFI, chances are it wasn't designed with carb signal in mind, so most likely, switching to a carb alone wouldn't net a gain. Unless that cam was better suited to run a carb to begin with and wasn't running to it's full potential with the EFI on there.

1slo5.0 · August 1st, 2010, 12:21 PM

EFI for the win.

You carb lovers can justify using those fossil carburetors all you want. I will continue to use EFI and blow your doors off and get 25 mpg while doing it.

Back in 2000 I was running 11.50s and getting 25mpg on the highway with a factory Ford EFI system in a 91 Mustang GT. Do that with a carburetor.

1slo5.0 · August 1st, 2010, 12:27 PM

Originally Posted by fogged306

That video is not accurate at all. For starters, what intake did they put on with the carb swap? That alone could have been worth a good chunk of the gain, because the 2 piece intake was probably choking that motor to begin with. Look at the powerband for that engine. I'll bet they put a single plane intake on it and thats what woke it up. I'll also agree that that EFI car probably wasn't tuned properly to a small degree. And, if you had a cam optimized for EFI, chances are it wasn't designed with carb signal in mind, so most likely, switching to a carb alone wouldn't net a gain. Unless that cam was better suited to run a carb to begin with and wasn't running to it's full potential with the EFI on there.

Exactly. If they are going to make a comparison then it should be an apples to apples comparison. Instead of using the standard two piece intake they should have been using a Super Victor EFI which is a far superior intake. Besides that there are variables such as the water pump and other things. Did anyone else notice the car being higher up on the rollers when they did the pulls after the carb swap?

AdderMk2 · August 1st, 2010, 02:26 PM

very very subjective and controversial video... for all we know, the car could have had a 70mm TB on it before...

I doubt you would see similar power gains in a car like mine... with its 90mm TB and Super Victor style intake..

Shit. my car would be a perfect car to test that on since I have a carb ready lower intake...

Timm10221 · August 1st, 2010, 02:39 PM

What size engine do you have?? I love how those intakes look and you dont have to remove much to adjust your rockers

MustangMatt96GT · August 1st, 2010, 04:47 PM

Originally Posted by 1slo5.0

EFI for the win.

You carb lovers can justify using those fossil carburetors all you want. I will continue to use EFI and blow your doors off and get 25 mpg while doing it.

Back in 2000 I was running 11.50s and getting 25mpg on the highway with a factory Ford EFI system in a 91 Mustang GT. Do that with a carburetor.

If I could have and would have knonw more about the computer systems in these cars, I would have mine EFI right now... But I can say that I have learned a HELL of a lot about carburators since I ran one.... But because of the efficency of EFI I would love to have it in my car. And actually have an A9P computer now and 5.0 harness for when I wanna convert my 351 to EFI

AdderMk2 · August 1st, 2010, 05:46 PM

Originally Posted by Timm10221

What size engine do you have?? I love how those intakes look and you dont have to remove much to adjust your rockers

i only need to remove my CAI tube, and valve covers...

and its a 347

July 31st, 2010, 01:24 AM	#1
Bowman66 Newbie 92 Mustang GT Join Date: Jul 2010 Location: ohio Posts: 38 iTrader: 0 reviews	92 mustang EFI to carb swap. Im currently goin thru the process of switchin my 92 5.0 over to carb set. I bought a new Edelbrock RPM airgap intake and a complete MSD ign. setup. i have Ran into a few snags so far a few bolts broke off into the heads while taking the lower intake off. Seeing as how the motor has 150k on it i wasnt shocked. So i picked a 90 302 ho motor with 66k to replace mine with for now. I was just goin to swap the heads but figured this would give me the chance to clean up the firewall and engine bay. ANy suggestions on how to smooth out the firewall?? Pulled the motor out tonight goin to start on cleaning the engine bay up etc tomorrow. Few ?s will my flywheel and balancer work on the 90 motor fine? dunno if they change the weight at all or not. what should i use to plug the EGR holes n the back of the heads? for now the original motor will b put on the stand and eventually be rebuilt with alot of xtra goodies =-) n ready to go back in over the winter. Last edited by MustangMatt96GT; August 1st, 2010 at 12:21 AM.

July 31st, 2010, 03:28 AM	#3
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Smoothing out the firewall requires welding plugs in all the holes, and then bondo, primer, and paint. Yes, your flywheel and balancer will work. They are the same. Plugging the egr passage in the heads is easy... go to the local hardware store with the equalizer tube and get the same size bolt. Sorry, don't remember the size off hand. BTW.... Why would you ditch the efi??? __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

July 31st, 2010, 11:04 AM	#5
horsepowerjunkie Hardcore Enthusiast 1989 Black LX---Turbo Join Date: Jun 2010 Location: just outside Minot, ND Posts: 1,153 iTrader: 0 reviews	WHY, WHY, WHY? This is 2010 People!!!! Carburators are for lawn mowers & Race Cars! __________________ 89 LX Black, Boss 331, C4,T76BB, FAST EFI 82 Capri RS,89 5.0 HO,Comp XE266,TW 170,T5,etc. 73 Dart Sport 340, 410ci Bracket Brawler 72 Demon 340 4-speed 1 of 1667 01 Ram Quad Cab 03 Grizzley 660

July 31st, 2010, 05:32 PM	#7
holset35 Regular 1986 LX NOTCH Join Date: May 2010 Location: MICHIGAN Posts: 140 iTrader: 0 reviews	cause it is cheaper see the price of efi parts then u have to get tuned hope the tuner knows what he is doing. __________________ 86 TRUNK 359w-SRP 8:1-GT40Ps-X303-MAC LONGTUBE'S-VICTOR JR INTAKE-850 HOLLEY-T-5-410's-150 shot

August 1st, 2010, 12:23 AM	#11
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	Both have thier advantages... I personally like the carb route because of the flexablitiy with a jet kit, blocked off power valves, a screw driver and knowing how to read a spark plug... For a DD that was just that something to drive to and from work, i would stick with an EFI setup... My car can be DD just fine, but is more of a race car. __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

July 31st, 2010, 01:25 AM	#2
Bowman66 Newbie 92 Mustang GT Join Date: Jul 2010 Location: ohio Posts: 38 iTrader: 0 reviews

July 31st, 2010, 06:09 PM	#9
Bowman66 Newbie 92 Mustang GT Join Date: Jul 2010 Location: ohio Posts: 38 iTrader: 0 reviews	I just dont have the patients to chase down sensors etc when shit goes on. WIth a car thats almost 20 years old sensor start goin bad left n right. Two it is way cheaper then buying injectors, bigger mass airflow etc. Its really just way simpler to tune a carb then a EFI setup for me seein as how I dont have alot of experience with tuning the EFI . thanks for the info fast stang. I figured that would be the best way to smooth out the firewall.

August 1st, 2010, 09:09 AM	#13
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	I'm gonna call BS on that. Obviously the car WAS NOT tuned properly with the EFI, but also, when they switched to carb, IT GAINED AN ELECTRIC WATER PUMP!!! And who knows what else was changed in the process. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

August 1st, 2010, 09:37 AM	#14
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	That video is not accurate at all. For starters, what intake did they put on with the carb swap? That alone could have been worth a good chunk of the gain, because the 2 piece intake was probably choking that motor to begin with. Look at the powerband for that engine. I'll bet they put a single plane intake on it and thats what woke it up. I'll also agree that that EFI car probably wasn't tuned properly to a small degree. And, if you had a cam optimized for EFI, chances are it wasn't designed with carb signal in mind, so most likely, switching to a carb alone wouldn't net a gain. Unless that cam was better suited to run a carb to begin with and wasn't running to it's full potential with the EFI on there.

August 1st, 2010, 12:21 PM	#15
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	EFI for the win. You carb lovers can justify using those fossil carburetors all you want. I will continue to use EFI and blow your doors off and get 25 mpg while doing it. Back in 2000 I was running 11.50s and getting 25mpg on the highway with a factory Ford EFI system in a 91 Mustang GT. Do that with a carburetor. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

August 1st, 2010, 02:26 PM	#17
AdderMk2 Banned Join Date: Aug 2007 Location: al-Ahhmadi, Kuwait Posts: 991 iTrader: 0 reviews	very very subjective and controversial video... for all we know, the car could have had a 70mm TB on it before... I doubt you would see similar power gains in a car like mine... with its 90mm TB and Super Victor style intake.. Shit. my car would be a perfect car to test that on since I have a carb ready lower intake... __________________ [URL="http://providence.craigslist.org/cto/2148862880.html"]1994 Cobra For Sale[/URL] [SIGPIC][/SIGPIC] [QUOTE=Timm10221]Its only a 10 inch Tach that sits right in the center of the dash with LED lights and a Spinner bezel that has dimonds and gold plating.. And when you hit 4500 plus is sounds off (AAHHH SHITT) :cool:[/QUOTE]

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