Im 18 and i got myself into a big project my valves burned out on my truck so i decided to pull my heads myself and get them machined. while in the process i decided to switch my 88 f-250's EFI out for a carb. but what id like to know is if my transmission is linked to my trucks computer? Or if i even have to worry about my transmission at all if im switching to carb? I'm new to this and im learnig as im going along. Any usefull information is greatly appreciated.
-Andre-

 

question 1. What is the Transmission code in the drivers side door jam.

Question 2. of more significance do your local authorities require Emmissions testing.

Question 3. why in the hell would you want to retro/downgrade to carburetion over EFI you'll lose power/fuel economy/and driveability in that process + you'll then have an Eternal CEL-Check Engine Light on from then on.

IF the answer to Question 1 is Trans Code=E it is computer controlled and Yes it takes it's cues not only from the computer but from sensor input from the Throttle position sensor mounted on the throttle body and this will not work you'd have to downgrade to a AOD or run a power hungry C6 although the C6 is a excellent heavy duty transmission it uses alot of power to run.

IF the answer to Question 2. is they require Emmissions Testing all other factors are Null and Void because you will be voiding your year model and Engines emmissions controls and thus killing any chance you have of passing the emmissions test end result is a unstreetable truck.

Now if you A. don't have an E4OD Code E transmission and B. Don't have to pass an Emmissions test. although ill advised for the previously mentioned performance and efficiency impact reasons then Yes you could hypothetically do this Although I wouldn't

 

x2 on court's response... You'll need a high rise intake manifold and a good 4bbl carb to get any of the power back. If I were you and i was in this far... I would get a cam or converting to MAF... At least that way you can add power and keep drivability... If you tell us what engine you have we can advise you on some good power upgrade options!

 

He hasn't mentioned which motor it is, but if it's a 460, he's going to need new heads, intake manifold, exhaust manifolds, and the carb along with everything mentioned by court1100f since the carb'ed and EFI motors have different port configurations.

 

Guess I am more of a SB and inline guy myself so i didn't even know that would be the case... Good to know and thanks for adding DIYiT... Learn something new everyday... Rep point coming your way!

 

Lol you and me both bro you and me Both I keep ending up with 300 Straight 6 EFIs so I must be doing something right!!!! NOW!!! if only I could end up with a Mass Air Flow 351W and a suitable 5 Speed with Abestos/metalic clutch or any High Performance clutch regardless of materials used

 

Wow, i def didnt know this this is really helpfull. i greatly appreciate all the advice. i have a 351w 5.8l gas

 

LOL... well my old man was a ford sales guy from 90-96ish... so i knew to stay far away from a 460! They can pull but they will also need a rebuild every 100k and eat gas like a SOB! my 300 I6's have done right by me.

You've been looking for a 351w MAF with as ZF 5spd! LOL haven't we all... I want that setup with a crew cab! I just rebuilt my 351w but refused to put it back into it's origional rusty SD 1988 F250! I finally found a 95 F350 with MAF 351w... 2wd and auto though... which is fine by me since I have a spare 5spd zf and a dana 44 sitting around! I'd been looking for a year on www.crazedlist.org all around the midwest and south and i ended up finding that crew cab 1/2 a mile up the road! LOL!!!

 

I guess with my limited experience (only my 460), I'd disagree with the first half, and whole-heartedly agree with the second half of that statement.

I've got 120,000 miles on my truck and while some of the accessories are in need of some TLC, the engine itself is running like a champ with no signs of slowing down anytime soon. While it hasn't been abused, it's been a work truck its whole life and has spent time pulling farm equipment around until I started taking it to school. I think they're great motors, but expensive to feed.

Highway miles I can manage 11-12 when I'm trying (but who does in a truck?), but I usually average 10 mpg. For the first 14 years of it's life my dad used it and maybe averaged 6 mpg pulling wagons and such, so....

112,000 miles / 6 mpg = 18,667 gallons
+
8,000 miles / 10 mpg = 800 gallons
----------------------------------------------------yeah... it's eats gas like an SOB

 

well... I kinda live in Ford Hallow down here in Iowa... I know plenty of 460 owners that drive their trucks hard and can't think of one that made it to 150K before needing a rebuild... I hope you can prove me wrong! I just like staying with the 351w and 300 I6. They create enough power for anything i need to do, get good MPGs, and as long as their taken care of last a hell of a long time!

 

I have always been a 460 fan. They are great engines, but they do like fuel. Like any another engine, if they are maintained there is no reason they would not go 200K+. Just keep your wallet handy to feed it.