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I would like to do the same thing on mine as well. Not to rain on foreman400x's parade, but I have a 95 F150 5.8L w/ auto tranny (hopefully we have the same truck). I really don't have any experience working with the EEC and computer and all that so this parts swap seems a bit intimidating. My brother has the same truck with the MAF and he has his eye on a newer 6.0L powerstroke and there is a chance that he may let me swap my speed density system for his MAF system. If I do this, what parts do I need to to get from him?
I reason this has come about is I finally decided to break down and get a K&N Fuel Injection Kit but then I realized if I was going to get the kit I might as well get the kit that supports the MAF. For some reason, I can't find any decent instructions for a 95 F150 with a 351, only an older 302 with a mustang parts swap.
why do you need maf? are you planning to modify your motor heavily? the cost and minimal gains you would get from maf dont warrant the cost. Speed Density will handle head,header,intake,cam (114*+lobseperation) just fine. ask any lightning truck owner running 13's with speed density.
but if you dead set on this fordfuelinjection.com has the answers for sure
MAF conversion was the best thing I did to mine. True, not a lot of HP gain from the conversion by itself but the improvement in drivability alone made it well worth it for me. No more high idle, sputtering and bucking at launch, puking on hills and way better throttle response.
I went with the Ford kit because I didn't feel confident enough to get the right parts on my own. It was the easiest way and took me a day to install. I've added a few minor upgrades before and after MAF and it all adds up.
I've used SD and MA systems for naturally aspirated as well as forced induction engines in the past, with great success with each combination (Ford or GM bits grafted onto whatever engine I'm playing with at the time).
As long as the cam overlap isn't too wild, speed density is fine. Since it measures vacuum, a lumpy cam will confuse the heck out of the SD system, as the vacuum will fluctuate more with a lumpier cam.
MA systems on the other hand measure air flow, so whatever the engine sucks in, it sucks in and the computer reacts accordingly. More of a hassle to graft on but you gain a smoother idle and a quicker throttle response, partly because of what the system measures, partly because the ford mass air system prioritizes sensor monitoring differently than with the older, SD system.
I suppose it's possible, and don't think that hadn't occured to me, but I'd already spent countless hours trying a lot of the different, excellent advice this forum has and the MAF conversion truly worked. It may have been the new computer and simply replacing it with an original SD computer may have cured it. It could have been the gasket I replaced at the time, but I probably would have figured that one out. No test or code ever made me suspect it was the computer.
Anyway, there were other reasons I wanted to convert. I do plan on some upgrades that would require a conversion or would be better applied with one. It doesn't hurt that it's sequential fire now, either.
All I know is, I doubt I would ever have gotten my truck to run like it does now by fiddling blindly with the old SD system. I spent considerable time before hand, reading many of the arguments for SD, and they were compelling, but not as simple or future proof as MAF was for me. Trust me, I debated this for a long time before I just dropped $600 and was biting my nails until I installed it, at which time I let out a sigh of relief when it exceeded my expectations.
My old ecu checked out fine and intake gaskets was new but I swaped everything to Maf . I didn't change plugs or wires . The timing was right on the nose on old set up . After the swap and checking timing it was good . Truck drives like new one and gets 15+ MPG compaired to the old 13 if luckly set up. I had less than $300.00 in use parts to swap over . 2 gallons saved or 30 miles . I drive 300 miles + a week. I paid for swap in under 4 months . Did 3 others with same 2 mpg improvement . But whats 3 trucks to the couple million out there. Find truck take everything out and swap I have a 94 the was Maf from factory . So they are out there.
why do you need maf? are you planning to modify your motor heavily? the cost and minimal gains you would get from maf dont warrant the cost. Speed Density will handle head,header,intake,cam (114*+lobseperation) just fine. ask any lightning truck owner running 13's with speed density.
but if you dead set on this fordfuelinjection.com has the answers for sure
I saw the cam you mentioned on comp cams website for speed density cams, how does it sound. When I rebuild my 93 351W would like to try that cam with headers and some better heads.
MAF conversion is a good investment. I had a 93 lighting that was my project for about 2 years, the truck had 39000 miles on it when i bought it. I ran the truck bone stock and the best time it ever got was in the high 14's. I started doing simply bolt ons and nuttin seem to make a big difference. So i decided to start doing alot of major mods to the truck and i swap it over to mass air. Just from the swap i dropped to low 14's. After that i added heads, long tube equal lenght headers, bullet mufflers, a c-6, 4.10s, stock intake ported, throttle body, cam, and a kenny bell supercharger with a stand alone programable fuel management system, and it went 11.20's on drag radials. But i think MAF conversion is the best thing if you have anykind of future mods in mind cause speed density just isn't realiable and the driveability isn't good. I mean if it was, would they still be using it????
If the speed density is programed and tweaked right for your engine, mass air wont gain you very very little. The problem with speed density is its calibrated for a production run and enery engine is different coming down the assembly line due to variations in castings etc.
I have an 88 bronco, and im swapping an 88 HO mustang moter into it, im goin to use GT-40 P heads, ford-racing shorty headers, and im hoping to use an Edelbrock truck intake, and step up to 24lb injectors. i want to convert to MAF, if i get the intake and MAF sensor, would it be benificial to get a mustang computuer?