So far I have been reading everything under the sun from the forums, tech articles and the Ford fuel injection site, I understand the difference between MAF and SD AOD v.s. E4OD as well as 5.0 v.s. 5.8.
I have a 90 F150 Extended Cab 4x4 with a perfectly good 5.0 w AOD. I need more power, period. I know that the 5.0 just can't devlop enough torque to be a really useful engine in this heavy of a truck. I want to build a 5.8 (I have a complete 90 5.8 from a Bronco), Stroke it to 393, edlebrock emission heads, edlebrock intake, custom cam, MSD ignition. I also already have just about all the parts I need for the MAF conversion. I have an A9P computer, Sensor, the necessary ducting, I'm just working on parts for my own harness or trying to find the old Pro-M overlay harness. This is what I would like some advice on..Sequence of the conversion.
Should I do the MAF on the 5.0, get it dialed in and then drop in big motor and tweek computer or should I drop in big motor with SD in place, scrounge a 5.8 SD computer to help work out any bugs with the motor install and then do MAF conversion and computer tweek for the 5.8.
For that matter what about staying SD get a cam ground with 114 deg lobe sep and tweek an SD computer?
I want to build a good usable truck with plenty of power for towing at altitude and gets pretty decent milage (14mpg or better). I know I could get this by buying a new truck but I'm looking at 4-5K versus 30K, pretty easy math.

 

Can't run a 393 w/ stock SD. Run it with MAF and pick a cam that is more appropriate for your engine. Trying to choose a SD friendly cam is restricting. Part of the reason why you want MAF is for more cam choices.

Don't mess around with doing something now and trying to switch it around later.

Run what you have until you've got all the parts you need to put in a 393 properly. Do it once and do it right.

 

Is it a good idea then to go ahead and do the MAF conversion with the 5.0 in the truck, work out the bugs if any develop. Build the 393 and then drop in. Then tune the mustang computer for the larger demand of the 393?

 

Well...I guess you could do that but it's alil more work/effort.

Why not leave it as it is and do the MAF conversion w/ the 393?

You will need larger injectors, and a larger than stock MAF sensor calibrated to that size injectors.

The wiring can be done either by you modifying the harness or getting another harness, check fordfuelinjection.com.

 

The 393 isn't built yet, and I need the truck to have as little down time as possible. I also need to milk as much power and usefullness as I can out of the 5.0 until the 393 is ready to go in. I have found in the past that when you are doing any kind of conversion there are always unforseen problems that bug the crap out of you, having two conversions going at the same time can lead to a real big pain in the butt. I had planned to go with 24lb injectors and have the stock air sensor recalibrated, if I need a bigger sensor what do you suggest?
I have decided to go with the new overlay harness that Professional Mass Air Systems is making. By the way they say they are going to have a complete plug and play conversion for trucks with E4OD trannies in about 2 months, it will be pricey because of the included extra computer for the trans (about 1400).

 

Well, I personally would just swap everything in all at once but either way can be done. There's going to be problems, always will and are pretty much unavoidable. Ya gotta have the knowledge to get around the problems in order to do this kind of stuff.

I'd suggest a larger MAF than a stocker for a 393, esp w/ what you're looking to do. I picked up a 75mm Pro-M for short money on eBay.

So you're running this with an E4OD instead of the AOD? Yeah that's difficult to run w/ MAF.

 

Took the 5.0 out of my 94 F-150 4x4 put lighting 351 in and other mods.big difference My truck is already mas air with E4OD trans. Took a lighting mass air conversion kit from ford racing and used the AKC0 computer and air meter calibrated for 30 LB injectors. the only down side right now is i can't use my 4-low right now but that ok.so this set up is working verry well. Now my brother took his 94 lighting converted over to mass air using that same kit and he prefer that over SD if this helps.

 

You don't need a 5.8 (mass air) PCM, once you do all of your mods, then get a chip and the programer will change the engine displacement.

If you have an AOD, then you can get a conversion kit from Ford, simple as that.