Is anyone using the Ford Racing mass air conversion kit on a 351W engine?
Part # (manual trans) M-9000-T50 or (automatic trans) M-9000-T51
Those kits are designed to for 5.0L and 5.8L engines. According to the instructions they work for both firing orders.
I'm currently replacing my 1991 5.0L and installing a 1989 5.8L engine.
My question is will this kit work with the new 5.8L engine, being that the firing order is different and I'm changing the injector pulses from bank-bank to sequential order?
Any advice would be helpful.

Thanks,
Jerry D.

 

Nothing huh!

 

I can't say for certain, but it seems that if the kit works with either firing order than it is still a batch fire (bank-bank) system and not sequential. You can swap cams and firing order, but I would tend to think they would mention that rather than say you can use it on either.

I know there are a few guys with stuff on using the car systems to swap to SEFI vs MPFI, but in the long run those that have done it say it wasn't worth it, and couldn't really tell any power differences. I would imagine for high end tunes on heavily modded engines it would be more of a difference, but even that might be hard to judge until someone does it and dynos the vehicle.

 

Why do you want to swap to MAF?

 

when i did my maf conversion i didnt buy the ford kit, i made one from junkyard parts, this can be better because if i am not mistaken the ford kit keeps the bank fire....and by the way if you are going with the maf conversion you will be using a mustang puter and they run a ho 302 which has the same firing order as the 351.

 

So, I just cut and soldered the wires for injectors 5 & 4 and 3 & 7, the idea is to create the 1 37 26 54 8 order from 1 54 26 37 8. I used a multimeter to identify which wire belongs to which injector.

 

I have a 92 F-150 and was curious, if I take the wiring harness from a 94 F150, do I need to cut any wires or change anything? I assume the computer would need to be changed, anyone know a good source for a E40D MAF computer?

Thanks.

 

If the 94 was maf...mine is not.

I was told at the dealer i needed ECU part# f5uz-12b579-aarm list 176.33 plus 75.00 core charge for a 95 5.8MAF E4OD.

Here's info for the swap I was looking at http://eecperformance.com/mafconversion.html

 

ketyokeinnor,

I think the majority of MAF trucks that are '94s are California emissions equipped. I've heard a lot of people claim there are no '94 or '95 MAF trucks, but I have a '95 that is mass air so I know that isn't true. That link you provided should answer the question from bigred92, good find on that one.



GTRider245,

Mass air systems calculate actual air intake more accurately than speed density systems, so they adapt better to mods without having to further tune them with a chip or programmer. If you do all your major mods at once and get a custom tune, speed density systems can do a great job. It's just that some people never quit adding more mods, so they for the most part prefer the mass air systems.

 

Yes I understand what MAF does, but if you do not plan on any mods that it would support, it is pretty pointless.

 

Check out his signature. With a blower and a stroker motor in the works, it seems he's going to take advantage of the conversion. He already has quite a few mods now, and it looks like build time again.

 

I wasnt refferring to him in particular, just people in general who want to do MAF conversions.

 

For most people I don't think it's worth it personally, and I say that with my truck being a factory mass air truck. Since most people either do more minor stuff or do their major mods at once, if it was me I'd just get a custom tune and stick with the speed density. There were plenty of very fast trucks including a lot of 1st generation Lightings that stayed with the speed density systems.

 

This is very true!
Before the blower and the mass air conversion is was running s/d.
I had 24# injectors,61mm T/B,Edelbrock heads, FMS A-312 cam,Long tube headers, Edelbrock Perfformer upper/lower intake,and a full MSD ignition.
It ran like a beast....with no chip.
You can really push the S/D system.