Fuel Injection

sixty7stang · Feb 7, 2013

I have a 67 Mustang Coupe with a 351W, and a 600cfm 4 barrel edelbrock carb. The car is used as my daily driver. I was wondering if it would be beneficial to convert to fuel injection. Cost? Efficiency? Would it be better for everyday driving? Thanks in advance. Also, any more questions about the set up just ask.

sixty7stang · Feb 7, 2013

Also, I would like to know the advantages and disadvantages of both carbs and fuel injection. Thanks

Iamdiffrnt · Feb 8, 2013

Ok, This is my OPINION, so take it with a grain of salt...
Carburetor:
+: Cheaper, easier to troubleshoot, no wiring (unless you have electric choke), fairly easy to get parts.
- : More maintenance, won't correct mixture for different fuel blends, Ethanol blends can corrode aluminum parts.
Fuel Injection:
+: Fairly maintenance free, can automatically adjust for different fuel blends.
- : Expensive, Everything is electric, can be a pain to troubleshoot, Fuel system has to be changed to work with fuel injection (higher pressure pump, possibly a return line to tank), parts will be dependant on system (and possibly sourced from manufacturer), exhaust may have to modified for O2 sensors.

Hope this helps, I'm sure others will chime in.

rbohm · Feb 9, 2013

Iamdiffrnt said:
Ok, This is my OPINION, so take it with a grain of salt...
Carburetor:
+: Cheaper, easier to troubleshoot, no wiring (unless you have electric choke), fairly easy to get parts.
- : More maintenance, won't correct mixture for different fuel blends, Ethanol blends can corrode aluminum parts.
Fuel Injection:
+: Fairly maintenance free, can automatically adjust for different fuel blends.
- : Expensive, Everything is electric, can be a pain to troubleshoot, Fuel system has to be changed to work with fuel injection (higher pressure pump, possibly a return line to tank), parts will be dependant on system (and possibly sourced from manufacturer), exhaust may have to modified for O2 sensors.

Hope this helps, I'm sure others will chime in.

well said. you can buy about ten carbs for the price of the average fuel injection system. EFI has the biggest advantage in that you can tune it to handle a variety of alcohol levels in the fuel, where as a carb is tuned for a specific level. EFI can also be tuned for better fuel economy and better performance because you have greater control over the fuel mixture. in the end the choice is yours. a good carb set up will handle nearly every situation you will encounter.

iskwezm · Feb 14, 2013

I went from a carb to fuel injection and will not go back. Im now looking for a EB Bronco and that one will definately have fuel injection since it will be more of a daily driver.

bartl · Feb 17, 2013

Unless you managed to get something on the cheap, the cost to convert would far outweigh any savings you'd potentially gain from better fuel management. That being said, there is no better fuel atomizer than a properly tuned carburetor, IMHO.

rbohm · Feb 17, 2013

bartl said:
Unless you managed to get something on the cheap, the cost to convert would far outweigh any savings you'd potentially gain from better fuel management

i would say that depends on what you are wanting from the engine. better fuel economy and better driveability are big assets expecially when in cold weather. there is also the lower maintenance with EFI, as you are not constantly adjusting the carb to handle various weather conditions.

That being said, there is no better fuel atomizer than a properly tuned carburetor, IMHO.

this is true to a point, but understand that EFI is going to be more consistent in the long run than just about any carb you can mention, with the exception of traditional weber carbs.

Hack · Feb 17, 2013

Carb is cheaper but will never be quite right unless you spend a lot of time adjusting it. Also as others have said a carb is more likely to have quirks like hard starting cold or get dirty or get vapor locked on a really warm day. Carbs are also more likely to run on when it's warm or freeze up when it's cold. I run a carb on my '70 and it's not quite right but I just live with it. I could pay someone to tune it or buy some wideband O2s and tune it myself, but I really hate working on fuel systems.

EFI adjusts itself so it gives the engine the right amount of fuel all the time. To me it's well worth the extra money, especially for a daily driver.

v8only · Feb 17, 2013

Efi will make it start and run like a modern car every single time..the only single benefit to carbs is ez cheap hp for racing.

Efi conversion can b done on the cheap..u can convert using 90% Fox mustang parts...which are dirt cheap...a 351 would require you to run a aftermarket intake like a edelbrock...or find an oem 5.8 gt40 intake

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Fuel Injection

sixty7stang

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