Mass Air Conversion on '92 5.8L for my F-250?

[95GTS]

One big question is what tranny do you have in the 92? IF it's a 5 speed then you got it good. You can use a mustang mass air with the A9L computer. If you have the E4OD forget it unless you've got alot of cash to throw around. A mass air conversion kit for a 351W will run you around $1000 and the only one of the few that are even out there that's worth anything is the one by Pro-M. The motor and the tranny are controlled by two different computers so it makes it hard to do a mass air conversion and so the Summit 5.0 mass air conversion kit will not work.

FYI the 5.8 also uses a EEC4. Anyways, it's pretty hard to make your own but it is possible. There's a guy on the NLOC board that used to make them and has a list of everything needed to do it. If you REALLY want it I can email to you as I think I still have it from when he emailed to me. Also you'd have to rig up your own air inlet tube going from the MAF to your dual throttle body set up (we don't have to worry about that on our Lightnings as they come stock with the GT40).

Save yourself the hassle and money and stay with the SD setup. The mass air really won't help. Alot of the GEN 1 guys that have done it actually lost ET with it. You don't need mass air, period. You can change anything on that motor, except the cam and the injectors, and the SD will be just fine. If you change the cam just stay with a speeddensity friendly cam (keeps enough vaccum to let the SD work) and you'll be fine. Check out mustangman65_79's post in this forum about his bronco where he and I have been talking about this. You can change the 19 lb injectors to 24 lb without major problems, but you'll some power because the computer doesn't know you changed injectors and still runs them as 19 lb'ers.

If you ever get to where you would need something like mass air, say you want a really healthy cam in a N/A application (higher compression, stroker, etc.) a big blower, turbo, or alot of nitrous oxide then you need to get the EEC tuner or the new one called the twEECer. This lets you completely program/tune your trucks computer COMPLETELY (any parameter) as many times as you want to for what ever mod, etc. Basically like burning a chip over and over and over......... And you'll still never need mass air. And the EEC tuner only costs about $360 (can't remember exact figure) compared to a mass air conversion of $1000. Go over to the National Lightning Owners Club site (link in my sig below) and go do a search for topics on mass air in the GEN 1 forum and you'll find all you need to know about it there. I don't know how much the twEECer is. It's a new one (basically a updated EEC tuner that's a little easier to use from what I hear). We have a dealer/tuner for the EEC tuner and twEECer on the NLOC site. You can scroll down to Performance Specialties on the Supporting Vendors section and talk to Raymond B. He's the MAN for that stuff. It's just crazy what you can do with those things (both motor and tranny by the way).