[moses Black 89]

Alright i have a 92 302 e4od and yes i did search. i am planning on going with a 393. I have a maf set up off of a 93 302 e40d. i have the sensor and the wiring harness. the only thing i lack is the computer. what computer will it take to make it work. And what else am i missing. Also what aftermarket intake is everyone running other than the edelbrock truck intake.

Arren

 

[Bronco4Life]

The VEX1 is what came with a MAF 302/E4OD.

You have the entire wiring harness off the old 302? Injectors, second O2, the whole thing?

 

[moses Black 89]

yeah from the computer all of the way around the firewall. Will the vex1 work with a 351 or will i have to run the 302 firing order.

 

[jgaytan]

The easiest way to get mass air into your truck if you want to keep your E4OD would be to use a 1988 - 1993 mustang A9L or A9P computer. They all had mass air with 19lb injectors and 302 engines, and the A9L is the most sought after computer. But you still need something to control your Electronic E4OD transmission so you need something like the Baumann TCS transmission controller that costs $425.00.(http://www.becontrols.com/pricing.htm)

Some people were able to run the mustang computer in parallel with your stock computer, meaning the mustang computer would run the engine and your stock computer would run the transmission but I have never done this so I couldn't tell ya how to do it. The fact of the matter is this can still be done, it just may cost a little more money to do it. Get yourself a hanes wiring manual for the mustang and wire your harness exactly like the mustang wiring diagram. Hope this helps

 

[95_G&W_XLT]

95 California trucks and I think 94 had MAF. That would be an easier way to get MAF, in my opinion. I think the 94 federal trucks w/302 also had MAF.

 

[jgaytan]

I forgot to read the fact that you were planning on a 393 and probably bigger injectors and bigger Mass air meter also refered to as an MAF. You will need a bigger MAF and injectors because the bigger engine sucks in more air and thus needs more fuel so you also need a bigger fuel pump. The easiest way would be to get a company to burn a custom chip for you. Even if you use the VEX1 computer or WHATEVER it still cant make up for the larger engine and larger injectors or a different mass air meter other than a stock one. It just wont work if you dont get a custom chip for the computer!!!!! Alot of bad things can happen if you dont do it right!!!

 

[Bronco4Life]

Yeah, there are computers for the 351, I don't remember their codes off hand, search for it under MAF conversion and you'll find it from Fireguy50.

You'll have to get a TwEECer for that computer to make up for the bigger meter, and bigger injectors I think.

I wouldn't bother with the A9L, considering that to do it right, you're going to need a TwEECer, and you'd get the same results. The Baum would be the only reason to go that route (not that you couldnt do that with the truck computer)... The Baum is a pretty cool little tool, and you can tweak everything on that E4OD, the main thing I like is the "paddle shifter" function... Makes your cruise control off/coast buttons a gear control, pretty slick.

 

[moses Black 89]

Ok so from what i can gather the harness and setup i have out of the 302 MAF truck will work, i just have to come up with a 351 e40d maf computer is that correct. I assume that means there is no feasable way to make the 302 computer work. Yes i understand i will have to tune it. Im just trying to find a way to make this combo work without spending a tremendous amount of money.

 

[Gacknar]

Lots of real good info in here.
As long as you own a lightning or a Mustang or are going to try to dragrace your Bronco.

Lots of misleading info if you want a low reving high torque truck engine.

For your MAF conversion using a 93 MAF tuck harness any one of the following computers will work with a 393 and E4OD.

HUG2 5.0 Bronco, F-x50 E-x50 MAF / E4OD (see note 1)
VEX1 5.0 Bronco, F-x50 E-x50 MAF / E4OD / F5TF-12A650-HB (see note 1)
WAY1 5.0 Bronco, F-x50 E-x50 MAF / E4OD / F5TF-12A650-JB (see note 1)
BIO0 5.8 Bronco, F-x50 E-x50 MAF / E4OD / F5TF-12A650-BYA (see note 1)
AKC0 5.8 93-95 Lightning MAF / E4OD / F8TF-12A650-NA (see note 1)

Note 1: Can be tuned by a chip into the J3 service port.

If you plan on keeping the RPMs down you may be able to get away with 19lb hr injectors and the stock MAF. (even with a 393) This also depends on what heads intake, etc, etc. A 393 with the factory heads and intake will have no problems functioning to any achivable rpm with 19lb hr injectors.
(this is becoue the heads and intake will choke the engine)

At the same time the exact same short block with diferant heads and intake may need 30lb hr (or greater) injectors.

Injector size is determaned by H.P. you need a basic idea of the engines hp before you decide what injectors you need.

http://www.superstallions.com/tech/eng/inject/injector.html

If you need bigger injectors then you need a bigger maf. The cats a$$ of MAFs is the 90mm Lightning unit from Ford racing.

To run either bigger injectors or a differant MAF you will need either a custom chip burned by a company like SCT or a programable chip system like a twEECer.


Somthing else to consider.
The following S.D. computers can also be tuned.
C3P1 5.8 93-95 Lightning SD-Bank / E4OD / F3TF-12A650-AB (see note 1)
C3P2 5.8 93-95 Lightning SD-Bank / E4OD / F3TF-12A650-AC (see note 1)
C3P3 5.8 93-95 Lightning SD-Bank / E4OD / F3TF-12A650-AD (see note 1)
ICY1 5.8 93-95 Lightning SD-Bank / E4OD / F5TF-12A650-XB (see note 1)

Note 1: Can be tuned by a chip into the J3 service port.

 

[moses Black 89]

Perfect. That is exactly what i was wanting to know to start off with. Also with size is the stock 93 MAF sensor. I was just going to ask about the L computer. Will the L computer work with my stock harness. The only problem i have with the L computer is the cam limitations. Where can i find some good cam limit info for either the L computer or the maf. All im looking for is something to run a flat top 393 with a small cam and a set of DOOE heads. Thank you for the info, you have been a tremendous help.


Arren

 

[blksn955.o]

the cams with SD limit is the lsa or lobe seperation...You will want to stay away from cams that are lower than 112lsa.

If your going to build a 393 your going to need a tune of some kind no matter what. IF you want it to be plug and play you will need to stick with a preaty close to stock setup...or stock to what computer you end up running for the least PITA install and no tune. Now you can run a H/C/I 351 and not go to radical and make some good low end and some good hp higher than a stock 351 will make. #1 you need to sit down and think about what the trucks use will be, #2 what your budget is, #3 how much of the work you will be doing yourself.

as far as MAF's and flow data...I actually am putting together a list/graph of the larger 4.6 mafs v. the 94-95 5.0 mustang mafs on stangnet.

her is a link http://forums.stangnet.com/showthread.php?t=628617

 

[derrick36]

Since he has the entire harness, is he going to run into any other wiring issues?

I've been looking for someone who has done this same swap, but I havent found a whole lot of info.

I've come across an entire harness, and WAY1 ecm for(what I consider) a great price, and am thinking of taking this same route, instead of using the lightning ecm I picked up.

Sorry to hi-jack

 

[jgaytan]

derrick,

as long as you have the entire truck harness and the WAY1 computer to go along with it, it is just a matter of connecting all the stock sensors up to it. If you dont have the stock MAF sensor, stock 19lb injectors, and or stock 302 engine, tunning is a must!! It can be a costly mistake, if things are not done properly. If you do your homework and reasearch this whole process can be quite fun!!!!

I did this whole process on my 351W 1988 ford bronco and modified my stock wiring harness so I could use the A9L computer along with an 80mm 1996 cobra MAF and 24lb injectors. I also used an "El Chepo" J3 service port chip and tuned it myself using the EEC Editor software from Paul Booth and the F1 Ford EEC Memory Adapter & the BURN1 Flash-n-Burn USB-Based Chip Programmer from Craig Moates (http://www.moates.net/). The link to Paul Booths software is in the software link at Craig Moates' web page and its free!! I just dont know how good support is for the software these days.

If this is over your head, please just pay for a custom chip and do it right. Otherwise ask questions and do it right the first time!

 

[derrick36]

derrick,

as long as you have the entire truck harness and the WAY1 computer to go along with it, it is just a matter of connecting all the stock sensors up to it. If you dont have the stock MAF sensor, stock 19lb injectors, and or stock 302 engine, tunning is a must!! It can be a costly mistake, if things are not done properly. If you do your homework and reasearch this whole process can be quite fun!!!!

Just to make sure we're talking about the same thing. You are talking about the complete engine harness, arent you? ECM all the way down?

I found whats being advertised as the complete engine harness, and a WAY1 from a wrecking yard, for cheap. They were closed so I didnt get a chance to actually call them...I'll work on that tomorrow.

As of this moment, I do have a stock 302, so I was thinking of going this route, and at least get it running, then since this is far more tuneable than what I have, it would make things easier when I go to swap in my bigger motor...I'm using the term "easier" lightly.

It just seems that there is more support for the WAY1 and VEX1 than there is for the C3P1 lightning ecm that I bought.

 

[jgaytan]

Yes, I am talking about the complete engine harness

 

[derrick36]

Yes, I am talking about the complete engine harness

Ok.

I just wanted to make sure. I'm gonna look a little more into the harness today. I found some at a few wrecking yards.

 

[Gacknar]

If you dont have the stock MAF sensor, stock 19lb injectors, and or stock 302 engine, tunning is a must!!

I disagree with regards to engine size. There is no reason a stock 302 Mass-Air computer with stock MAF and factory 19lb hr injectors cant run a stock 351W.

H.P. determines injector size, not C.I.
Ofcourse once you need bigger injectors, you need a bigger MAF and ofcourse then you need to tune the computer so it can use the new equipment.

 

[derrick36]

I disagree with regards to engine size. There is no reason a stock 302 Mass-Air computer with stock MAF and factory 19lb hr injectors cant run a stock 351W.

H.P. determines injector size, not C.I.
Ofcourse once you need bigger injectors, you need a bigger MAF and ofcourse then you need to tune the computer so it can use the new equipment.

Whatever.

That doesnt concern me at this point.

Getting it installed and running is the first step.

 

[blksn955.o]

A common "myth" on the web and other places started in part by the aftermarket MAF companies that "fool" the eec for inj. is that the MAF ONLY tells the eec how much air is coming into the motor, NOT what size inj. there is.

You will only need to change the maf if you
1. want to run bigger inj. and dont want to get a tune to change the inj. size in the eec's programming.
2. your "pegging" the maf at 4.8-4.9volts or your motor is taking in more air than the MAF can read.

#1 is for use with a aftermarket MAF that will "fool" the signal to the eec to make up for the inj. size. However, if you want to tune or get a tune made to the eec they can just change the inj. size in the eec.

In all reality...it may be a better idea to see if any tuners in the area near you can tune SD? SD is a good power making setup, it just gets into the realm of needing a tune sooner than mass air. What I am saying is if someone is good and can tune your stock SD computer there realy is no need to make the change to mass air. Esp. if your biggest problem is getting a larger inj. to work.

 

[derrick36]

A common "myth" on the web and other places started in part by the aftermarket MAF companies that "fool" the eec for inj. is that the MAF ONLY tells the eec how much air is coming into the motor, NOT what size inj. there is.

You will only need to change the maf if you
1. want to run bigger inj. and dont want to get a tune to change the inj. size in the eec's programming.
2. your "pegging" the maf at 4.8-4.9volts or your motor is taking in more air than the MAF can read.

#1 is for use with a aftermarket MAF that will "fool" the signal to the eec to make up for the inj. size. However, if you want to tune or get a tune made to the eec they can just change the inj. size in the eec.

In all reality...it may be a better idea to see if any tuners in the area near you can tune SD? SD is a good power making setup, it just gets into the realm of needing a tune sooner than mass air. What I am saying is if someone is good and can tune your stock SD computer there realy is no need to make the change to mass air. Esp. if your biggest problem is getting a larger inj. to work.

I'm not sure if that was directed at me or not.

It would be awesome if I could stick with the Lightning ecm that I picked up. I like the fact that it would plug directly into my existing harness.

Finding a local tuner, is turning up zero leads thus far. I've been emailing, and calling various places b/c I would be willing to take it somewhere outside of the general area, if it meant getting it to run right, but so far I've been getting the cold shoulder as soon as I mention SD.

I know it's possible. I see tons of guys over on NLOC that are going with crazier engine combos than I would ever run, but it just seems like it is going to be a ton easier to find help when a problem arises, if I switch to MA.

I just called on a MA ecm(WAY1), and it's exactly half the price I paid for the Lightning ECM. I might just buy it, so I have a back up plan, if something doesnt work out. I've also come across a few options for the MA harness. I just wanna find a little more info b4 I buy.