i have a 92 bronco full size. What will i gain if a convert to MAF? It is completly stock now. I would like more power especially while towing. I plan to get bigger gears but will MAF add any horsepower?

 

MAF by itself dosen't add more power. Although sequential fuel injection is a plus. What happens is the Speed Density system is not real tolerant of equipment changes ie bigger cam, headers, big valve heads, large port intakes. Where a MAF is more tolerant. Simply changing rear gears to boost pulling power won't really affect a Speed Density system. You'll just be running higher rpms on the highway depending on what ratio and tire combo. So if all you need is a little better start off the line switching to different gears could help.

 

WOn't switching to MAF improve mileage as well?

 

I just saw a conversion wiring kit in the Jegs or Summit catalog for something like $60. I will have to take a look for it when I get home tonight. I meant to post it but I forgot.

 

if u find that link again try to post it ...i am thinkin about doin this swap too

 

I believe the kit to convert SD to MAF is close to $700.

I am rebuilding my 302 and have heard that Speed Density WILL WORK with certain engine modifications, you just have to be careful that the components you select are designed to work with the SD system.

 

Well I am looking at the Jegs catalog and it states that it's for 86 to 88 mustangs, not a truck. I am not sure whats different between the truck and the mustang. The cost is $79.99 and the part number is 467-81868801

Not sure if it could be used on a truck or not but it may be worth looking into.

 

You get into some issues with the truck versus the Mustang EEC, namely with the firing order and SEFI. There are some on the boards who have successfully swapped a Mustang MAF into their Bronco's, and then there are those (like myself) who've used a conversion kit. Sort of depends on how much you're comfortable with in terms of following wiring diagrams and making wiring changes. (Both can be done, though) You can make modifications to your engine and get away with having a custom chip burned for $200 - $300, but it will be specific to your mods, only, and usually can only be done for '88 - '89 and up.

With my situation, I tried to stay with speed density and make only what I considered to be "EEC-friendly" mods on my 302 rebuild, i.e. Crane Compu-Cam, E7TE heads with three-angle valve job, stock intake and injectors, and headers with high-flow cat. No such luck. The engine ran like a top at colder temps, but at 60F and above, when the EGR valve really started to work, it totally screwed up the fuel mix and caused the truck to surge, buck, etc. I tried to have a chip burned, but I guess an '85 EEC-IV is sort of the Commodore 64 of the family, and I was told that one couldn't be made. I determined that I could have retrofitted in an '89 and up EEC with some wiring changes, and then had a chip burned for it, but after all was said and done I used an '87 - '93 FRPP Mass Air Conversion Kit, slightly modified to work on my '85. The truck runs and idles like new, now, and at least if I want to upgrade heads, intake, cam, etc. in the future I can and the system will adapt.

As has been stated, Mass Air is more of a mod to complement other mods and allow them to work correctly, than it is an upgrade by itself. That said, it does lay the groundwork for some nice engine packages.