fuel injection or carburetion?
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Elder User
Joined: May 2007
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From: Sparks, NV
fuel injection or carburetion?
This has come up one sided in my searches so here goes;
what is better for fuel economy? fuel injection or carburetor?
i got a 1981 302 with the 600cfm holley. runs perfect and pulls good despite its 3.27 rear gears.
i also have a 1993 302 stock fuel injection. it has much more oomph because all cylinders are getting equal amounts of fuel right? Thus causing it to waste some gas...
now my brother will be swapping in a fuelie 351 for a carbed 302 in a bronco. It has the megasquirt DIY fuel injection to control his well... injection of fuel and be able to lean it out with a turn of a dial.
what would be better on daily driving? just so everybody is sure of this; i have no problems with carburetors im just curious with these old trucks
what is better for fuel economy? fuel injection or carburetor?
i got a 1981 302 with the 600cfm holley. runs perfect and pulls good despite its 3.27 rear gears.
i also have a 1993 302 stock fuel injection. it has much more oomph because all cylinders are getting equal amounts of fuel right? Thus causing it to waste some gas...
now my brother will be swapping in a fuelie 351 for a carbed 302 in a bronco. It has the megasquirt DIY fuel injection to control his well... injection of fuel and be able to lean it out with a turn of a dial.
what would be better on daily driving? just so everybody is sure of this; i have no problems with carburetors im just curious with these old trucks
Last edited by Kuskoal; Aug 1, 2008 at 01:48 AM. Reason: re-read it and revised it
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
The '93 EFI motor should get 15mpg on average, if it doesn't there's somethnig wrong that needs fixin... I doubt the '81 can touch that milage. The Megasquirt system will have a slight advantage over the stock efi system in that it can be leaned out beyond 14.7:1, this should net impressive hwy cruising milage for the motor, but probably won't make any difference around town driving. If the aftermarket system on the 351 is not the miltipoint version(individual injectors for each cylinder) it will have no advantage over the stock EFI system.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Anyway...fuel injection beats carburetors any day of the week. The only reason to stick with a carburetor is if the engine already has one. The only real advantage of a carburetor is that you can do pretty much everything on it with a flathead screwdriver. Fuel injection typically takes more advanced tools to diagnose problems, but the problems are few and far between.
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Sequential EFI (SEFI) like on the Mustang 5.0 fires one injector at a time just as the intake valve starts to open. Very efficient.
EFI on the earlier trucks uses a batch fire injector program which fires 4 at a time.
Both are still better than a carb in mileage and torque.
EFI on the earlier trucks uses a batch fire injector program which fires 4 at a time.
Both are still better than a carb in mileage and torque.
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