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Topic: MAF conversion 5.0 HO (Read 8562 times) previous topic - next topic

MAF conversion 5.0 HO

I am working on a 1986 Cougar for a friend. We have installed a 5.0 HO from Jasper, (Windsor firing order, level 1 cam, 9.0 compression ratio) and a complete intake from a 1988 Mustang, (HO upper plenum, 19 lbhr injectors, etc.), and a ECM from the 1988. Have learned ( I guess better late than never) about speed density shortcomings and we're currently searching for  ECM, MAF setup we can use. Does anyone know offhand which vehicles might have the setup I need, what are the MAF parameters given the injectors, cam, etc.? Any help is greatly appreciated.

MAF conversion 5.0 HO

Reply #1 –
Hey guys, This is my "86" my friend is working on. I believe the compression is actually 9.2, and the engine is a "87" Mustang H/O. He bought the same ECM as the "88" Mustang that he pulled the upper plenum, injectors. and much larger throttle body set up it had. Then found out that ford switched to speed density in 1988 and of course my "86" has MAF. I went ahead and put a duel exhaust with high flow cats., electric fan, and an under drive pulley set. This should be the last hurdle, any help will be appreciated!

MAF conversion 5.0 HO

Reply #2 –
Ford ran speed density on the Mustangs from 86-88 with the exception of the California cars in 88 as they had MAF.  Do a search on here and you will turn up many threads covering the conversion and what EEC's will work.  I know there is a thread on the Corral that lists all the compatible EEC's.

Darren

83 351W TKO'd T-Bird on the bottle


93 331 Mustang Coupe - 368 rwhp

MAF conversion 5.0 HO

Reply #3 –
Aerocoupe,
                I've been reading up on this forum on engine swaps and conversions. I was still having the same problem as my friend, finding the correct part number for the EEC that would work. Jimmi said that every where he went there was someone trying to sell him something and claiming that it would work (too many opinions). Thanks for suggesting the link to "The Corral", it looks like it has all the information we will need. Hopefully soon, I will get to let you know how my car turns out after all the work that has been done on it this last year. I've put over 10k and a year of work into it so now all I should need is oil, filter and hi octane. Being that I am moving out in the country and I retired about a year ago, my insurance will go down (I don't have to drive to work every day and a lot less traffic) and no more paying for emissions or the hassle. There is a family that I am told I am related to who lives across the street from my new house and they have about four hot rods and many more come to visit them (you can hear them coming). I'm sure it will get there attention once I have a lift installed in my garage and I move my vehicles down there. I can't wait! Again, Thanks, for your help!

MAF conversion 5.0 HO

Reply #4 –
A9l a9p
87 TC
HO Swap, T5 Swap, Mach Springs, CHE Upper and Lower control arms, Mach Chin spoiler, soon to be Procharged.

:evilgrin: Nitrous is like a hot chick with an STD you want to hit it but are scared of the consequences. :evilgrin:

MAF conversion 5.0 HO

Reply #6 –
Quote from: bigbada1;412579
A9l a9p

What?

88Turbo,
              Yea, I saw that. Eric has a lot of good imfo.!

MAF conversion 5.0 HO

Reply #7 –
Quote from: bigbada1;412579
A9l a9p

 
Quote from: 86cougar;412591
What?

88Turbo,
              Yea, I saw that. Eric has a lot of good imfo.!


A9L and A9P are the codes for the computer that will work for a MAF swap in your car.

Just wondering but why do you need to do a MAF swap? A basically stock HO engine runs fine on speed density.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

MAF conversion 5.0 HO

Reply #8 –
Oh, I got it. The reason I need to do a conversion, is because I have an "86" cougar that came with a stock 5.0 engine and MAF. I just put a "87" Mustang HO engine and got the upper plenum, throttle body and EEC from a "88" Mustang HO engine and it used speed density. So, if I understand where we are now, I just need the mass air sensor and MAF cable harness adapter and it will be done.

MAF conversion 5.0 HO

Reply #9 –
Quote from: thunderjet302;412599
A9L and A9P are the codes for the computer that will work for a MAF swap in your car.

Just wondering but why do you need to do a MAF swap? A basically stock HO engine runs fine on speed density.

 

A stock HO actually runs better on a speed densety setup... In the real world the mass air Stangs were down about 15-20Hp from the SD and is basically why the '93 was down rated...

MAF conversion 5.0 HO

Reply #10 –
TurboCoupe50,
Hang on a minute.  If mass air was across the board on these cars starting in 89 why was the 93 the only year to be "down rated" because of mass air?  Here is one of many good threads that this is debated on and a few guys post up some good tech that disproves that:

http://www.stangnet.com/mustang-forums/threads/90-93-5-0-hp-factory-hp-rating.709173/

While SD cars typically make more power at the track, it is done by tuning the car run by run (basically being the mass air for the car).  The mass air cars will out perform a SD car on the street as they can adapt to the atmospheric conditions, learn more aggressive cams, and take advantage of more air in and out of the motor.  They also have their limitations but a quick tune and they once again perform very well and continue to adapt.

86cougar,
To my knowledge no Fox 5.0 T-Bird or Cougar came with an MAF factory.  What I am gathering from your posts is that the car came with the stock SD 5.0 and had been converted to mass air as it had an mass air meter (MAF)?  Then you removed that setup and installed an 87 5.0 out of a SD Mustang (they started mass air in the Mustang's in 88 but only in the California cars) and installed a SD computer and the car is currently in this configuration.  Now you want to covert the current combination over to mass air.  Is this all correct?

Darren

83 351W TKO'd T-Bird on the bottle


93 331 Mustang Coupe - 368 rwhp

MAF conversion 5.0 HO

Reply #11 –
Aerocoupe,
                The best way for me to answer that is have you read the first post here by jimmi. All I really know is that the car was completely stock when I bought it. The MAF has never been changed. The EEC he took off the "88" Mustang is for SD. He bought the EEC because of the difference in size of the upper plenum, throttle body and injectors (19 lbs.) that he took off that car. Like he said, he was unaware of the change from MAF to SD. That is what he told me. I hope that answers your question.

MAF conversion 5.0 HO

Reply #12 –
Okay, only mass air cars have an MAF which look like this:

http://www.cjponyparts.com/product.aspx?p=MAM1&utm_source=google&utm_medium=merchant&utm_campaign=shopping&gclid=CKiaocy1srYCFQvnnAodU1IAxw

This is an article out of MM&FF which talks about converting a SD Mustang over to a mass air car.  Look at the two pictures about half way down the page showing the engine compartment.  You will see in the second picture the MAF mounted in between the air filter housing and the throttle body:

http://www.musclemustangfastfords.com/tech/mmfp_0910_mass_airflow_conversion/viewall.html

Found this article on a random search and had to post it:

http://www.hotrod.com/pitstop/hrdp_0705_pitstop_ford_thunderbird_mass_air_sensor/

Anyhow, if your 86 had a SD EEC in it and the MAF then I would assume that the MAF was never wired up to the EEC and the air was just passing through it or they attempted to wire it up and the car either ran like  or did not run.

Darren

83 351W TKO'd T-Bird on the bottle


93 331 Mustang Coupe - 368 rwhp

MAF conversion 5.0 HO

Reply #13 –
From what I read on the link you sent me, my car came with a MAP not a MAF. I really need to get jimmi on here to let us all know where he's at with it. Last time I talked to him he was going to buy a sensor for the SD set up. I think it is all he's missing along with a MAF harness adapter.

MAF conversion 5.0 HO

Reply #14 –
Quote from: Aerocoupe;412618
TurboCoupe50,
Hang on a minute.  If mass air was across the board on these cars starting in 89 why was the 93 the only year to be "down rated" because of mass air?  Here is one of many good threads that this is debated on and a few guys post up some good tech that disproves that:

http://www.stangnet.com/mustang-forums/threads/90-93-5-0-hp-factory-hp-rating.709173/

Darren

There was really no big difference in any of the '88-'93 Mass air Stangs, all were slower than the '87-'88 SD versions, just took Ford five years to get around to admitting they made less HP...

I converted a '86 to Mass Air that I was planning major mods but never did... Running SD with underdrives, 1.7 rockers & a 2.5" cat back system it'd run a traction less 14.50 all day long... After I converted it to MA it felt slow and the best it ever ran was a 14.72, lost MPH as well... Pissed at the MA, I converted it back to SD at the track that same night and it picked up the missing .22...

Of course if the engine is modified the Mass Air is the way to go... Using the same ECM I had in the Stang, the Bird went 13.11 & 12.23 with the blue Smurf in the trunk.... Of course it had a 76mm MAF meter, 65mm TB, 24lb inj, Trick Flow heads & cam, 1 5/8" headers with full 2.5" exhaust system, etc, etc...