I have a 1989 F350 FI (460ci) can it swapped out for 2bbl intake manifold, and would it help with its gas Guzzling?

 

lotta work. you would have fuel pressure issues. cause carbs use about 7lbs of pressure. you would have tons of ignition woes with the computer.
you would really have to repower the ignition old school with coil,dizzy, and use block mounted fuel pump. I thought about this too on my 88 w/460 and after studying all the b/s decided to just fix my fuel injection properly. if your fuel injection setup is working properly it will outdo a carb setup by miles per gallon. alot more efficent, think about it ford didnt just decide to go with injection for giggles. good luck

 

Thanks for the input.

 

Fuel Injected 7.5L heads have a unique port spacing as well. A factory carb. manifold will not fit. I thought someone posted an aftermarket 4 barrel manifold version a few months ago.

 

Price Motorsport makes an adapter plate that fits a Holley 4 barrel and replaces your upper manifold.

Go to their site and look under carb spacers for part# CS460EFI or something like that.
The kit comes with plugs for the injector ports.
Otherwise all you really need is a recirculating fuel pressure regulator to get to 7#.
You don't want to dead head it or you will kill the pumps.

 

Boots,
I don't see where 460 EFI gets any better mileage than a carb.
NOTHING is going to help Big Block mileage with a rear ratio that keeps the motor spinning.
Stay off the highway and don't gun it.
When you get tired of that accept the reality that aerodynamics and displacement are NOT something you can change.

The fact that they introduced The ZF-42 overdrive 5 speed and an OD automatic to replace the C6 at the same time they went to FI in '88 made the difference.

The change over is very simple.

 

In short the answer is no, that's a massive truck with the biggest gasoline engine ever produced so if it gets 8mpg you should consider yourself lucky.

 

My 96 460 gets better than that. I get 11 around town & 13-14 on the highway-and I'm at 6500 ft above sea level! It's a 4x4 5spd.
Having said that, I think if you're looking for mileage out of a full size pickup, especially a big block, you're barking up the wrong tree. I've owned a lot on trucks over the years & they all guzzled gas.

 

9 & 12 with a Holley 0-80457s, ZF5, 4.10's and stock 235/85 R16's

 

I politely disagree. fuel injection is more efficiently monitered, you would have to be carb master to ever get a carb to compare to fuel injection. and most guys really dont understand how to meter a carb, or fine tune them. Im sure somewhere there is whole article posted on just this argument, and would lay cookies to donuts that the injection wins when both are equally tuned well.

 

+1

A carb system is static, set up ideally for one temp, one set barometric pressure and one paticular throttle plate setting. Anything outside of this "ideal" setting means less efficiency.

The single biggest proff of this is go up to 5000 feet with a sea level jetted carb and see what happens. It cannot dynamicly adjust and thus overfuels.

A EFI is a dynamicly adjustble system, able to accont for differing temps, air pressures and throttle plate / loads. Go up to 5000 feet and you get a perfectly adjusted feul / air mixture due to the dynamic nature of EFI.

Its a whole new world out there. carbs have been dead for twenty years now - unless we have a EMP, but then there is a whole bunch of other stuff to worry about as well!

David