Plans are in the works for my EFI 460 to soon become a 514cid stroker motor. Its in an '88 F-250, 5-speed tranny, running a EEC-IV Speed denisty system which cannot support this as well as several of the other mods I'm planing. What I'm needing to do is convert over to Mass Air.

I talked to a guy that was running MAF on an EFI 460 and if I'm not badly mistaken he was using a 5.8L EEC-IV MAF module that also provided sequential fuel injection(which is another nice addition). If this is correct, thats one part done, but I still need a mass air sensor, jumper harness, and any other parts that are needed for this application.

I'm planing on converting over to mass air right now with the 460. I'm doing this so I can get any problems ironed out before the new motor build-up, one less thing to worry about. Any details on exactly what I need would be great. Thanks in advance for any help.

 

If the firing order is the same, then the SEFI will work. I was thinking that the trucks were batch fired though (except 93-95 Lightnings).

 

I'm not exactly sure how the modules are programed to work, but I do know that the 302 and 460 have the same firing order. With this in mind, the module I was refering to was the one included in the 87-93 F-series 5.0L/5.8L mass air conversion kit, offered from ford racing, P/N M-9000-T50. Apperently this module will work on either the 302(and 460) firing order as well as the 351.

IF this is the case, I believe that it would work. However, I still need to find a MAF sensor that will work. I was looking at the 90mm Mass air meter for a 2003 lightning, also offered from ford racing, P/N M-12579-L54. It can be recalibrated for use in other applications, however I'm not sure if a single 90mm would flow enough air to support a 514cu in motor. Is there anyhting else that I'm over looking for this conversion?

Also, I have heard that in the '95? and up calif. emmission models MAF was used instead of speed density on the 460. I'm not sure if this is true or not, but if it is it might be an easy swap if I could find a donor vehicle. Thanks for the help so far.

 

All the trucks were batch fired, although I'm not sure about the first gen lightning. It wouldn't matter, because the MAF conversion kit would convert it to SEFI regardless. The 90mm MAF would probably be big enough, but I don't know that for sure. One thing to be aware of is there are different plugs on the MAF electronics on different years - check to make sure the wiring harness will match the MAF meter. www.pro-flow.com would have the sizing information you need.

I don't know if the 460 ever got MAF or not, but if they did, then that might make for an easier swap. I'm sure if they exist, they are very rare, and so you might have a hard time finding the parts you need.

 

I haven't heard of using a GEN 2 Lightning MAF on a N/A application since they are cal'd for boost. I'm sure the transfer function in the PCM could be modified to accomadate it though.
Have you considered using a Pro-M Univer or SCT air meters for that monster?

 

I just ordered that kit for my 5.0L. I decided to take the "easy" way out since after a lot of reading on the subject, here and elsewhere, there were too many things to (for me) keep track of.

From what I've read the kit comes with a 90's mustang computer(I forget the exact years). The harness provided adapts the different firing order of the mustang 5.0L HO to the trucks firing order since it also converts it from bank firing to sequential. I think the 351 has the same order as a mustang and is easier to convert from scratch. My 302 would require me to swap around pin connectors and re-arrange the harness if I were to do it from the parts yard.

The main issues are MAF sensor/injector sizes, firing order, cubic inches and O2 sensors (1 or 2 sensors and 1 or 3 wire sensors).

All said and done you will probably have to reprogram any ECM you use, for the new engine size and whatever MAF sensor/injector combo you use.

 

514 CI? Holy crap batman. That would be a deadly motor in a 1/2 ton. Put a supercharger on that and peel yourself off the seat! Man. deadly.

 

I'm in a similar situation with my 521 EFI build. I decided to go with an SDS system:

http://www.wmsracing.com/wmsweb/sds.htm

SDS is a fully programmable speed density system which basically replaces your EEC-IV computer. It plugs directly to your EEC-IV harness and comes with a handheld programmer. It's not a MAF setup, and it's not SEFI... but simplicity is a bonus for me. It costs about $1100, which may be reasonable once you add up the cost of converting to MAF.

Even if you don't want the SDS system, the web site contains a lot of discussion regarding speed density vs. MAF, batch fire vs SEFI, etc. I have found it very helpful during my engine build.

Scott

 

That's cool. I would have liked to have had a chance to see that option before my MAF conversion.

It wouldn't have changed my choice. I'm overjoyed with the results of my conversion and the price would have put the SDS out of my range anyway.