I have a 400 modified in my 78 f250 I want to convert to efi the best way possible I was looking at the adaptors for using the 351 windsor intake on my motor I need to know more about what to expect when it comes to the computer,sensor, wiring harness and things like thathat I need the harness and computer to only control what is needed to run the efi system would appreciate advice on making this transition as cost efficient as possible

 

Funny thing about Fords, they have all sorts of things that don't make sense. Like the 3.5" stroke version of your engine is a 351M, modified, the 4" stroke version is just a 400. That's picking nits but I got here first this time.

I wasn't aware there were adapters to go from 351W intakes to 400s. So ZI had to go looking and found Price Motorsports. Thanks for the tip.

I'd say go with the earliest port fuel injection system for a manual transmission truck. I think the magic letters are EEC IV.
Check out this link: Fuel Injection Technical Library » EEC Computers

People I know say this is the starting point for the Ford FI swap.

R.

 

Thanks for the information my truck is a automatic tho I'll check out that website

 

I believe Tim Meyer can supply an intake for your 400 with ports for the injectors already drilled.

Assuming your auto is a C6, which is all Ford put behind them in the trucks, the manual tranny EFI program will work fine since the C6 doesn't have any electronics.

 

Alright do you have a link to the intake your talking about

 

Here's a link to the intake manifold offerings on Tim's site. But, I don't see those manifolds, so you should contact Tim. You'll probably have to leave a message, but he's pretty good about getting back with you.

 

I didn't see them when I went and looked making sure I didn't miss anything I may contact him soon

 

It may be that I dreamed it. Or, it may be that he does them on special order. Or, maybe it is on his new Track Boss intake, which is his own intake.

 

If you use the 351 EFI intake be sure to get the later Mass air style instead of the Speed Density used on the earlier trucks. I think the Mass air change took place in 94.

 

yeah tmeyer adaptor plates and stock 351w efi manifold parts is a start but if you are talking cheap those adaptors are a couple hundred so that is not a easy start vs using a performer 400 manifold and making it.

 

Have you considered some of the throttle body "carby" style injector systems?
Probably a bit more pricey over using bits from other cars but may be easier? don't worry, lots of things I haven't done to my ride coz of bucks, and we just don't have the available bits here in OZ that you can get in the US especially from the wreckers. merry xmas

 

Yeah, smiffy makes a good point - you might look into getting a used Holley ProJection system - aftermarket, stand-alone Throttle Bottle Fuel Injection system, my father has it on a '72 Bronco with a 302 that's been transplanted into the thing and it works well once you get the bugs worked out (fuel supply in his case).

 

I talked to Tim, and his manifold isn't, as yet, set up for injectors. But what he's done is to use a 351C manifold and the adapters, and drill the adapters.

 

I looked at piecing together a system using factory parts and I could never get the price below $1000 and you still need to do some custom tuning to get those to run correctly on a 400ci engine because those were optimized for 302 or 351ci. That cost money and you have to have a good tuning shop that is willing for tune a Ford EFI system.....good luck finding one of those, most guys want to only touch GM stuff.

I went with a FAST EZ EFI system, not the new 2.0 but the last generation. They still sell both and you can find the first gen systems for a more reasonable price online. These are designed for the average dumb ***, inbred Chevy driver to install so these go on quick and fairly easily. The most work for me was mounting the fuel pump and running a return line. Even then, it only took a long weekend....start Friday afternoon and fired it on a Sunday night (early, like 6pm). Worked like a charm and fired up on the first try. I would never recommend piecing together a system from factory parts after this....these systems work great on mild motors and on a motor like mine with a big cam work 100x better than a carb.

 

good to see you here 73XA.
Interesting to see some-ones point of view over the new systems. I did hear reports that some of the older styles from all brands could at times be problematic, but I am very interested one day to put one on my 400.
No buggering around with carbies coming out of tune, cold starts etc. and by the time you pay for 500+ bucks for a good carby over here, it is almost justifiable ponying up 1500 more for a cheaper throttle body system.