Mass Air Conversion
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Mass Air Conversion
Guys I know this has already been asked before I know it has, but I was wanting to know in a hurry how wild you can go with Mass air after converting from Speed Density?
Thanks
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Hotshot
Joined: Jul 2002
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From: Bend,OR
mass air is great but still requires tuning as well. Mass air is not the saving grace of efi, it just gives you more range of motion in cam selection and displacment. but you throw a f cam in a 5.0 stang and it will run but still not perfect, thats when a tune is needed.
you can go wild with SD, just get the proper ecu, a tweecer and you can run basicly anything you want.
you can go wild with SD, just get the proper ecu, a tweecer and you can run basicly anything you want.
Senior User
Joined: Jun 2006
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From: Murfreesboro, TN
Quick question concerning ECUs: Has anyone run a H.O. Computer from a Mustang on a non-H.O. engine (old 302 firing order)? I'm looking at doing at least SEFI and was wondering if I needed to add an HO camshaft to the grocery list.
Lead Driver
Joined: Nov 2002
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From: Concord, NC
I ran an 89-93 mustang mass air computer on my 87 truck for a while. I just rearranged the injector order to match the engine firing order. This is exactly what the Ford Motorsport mass air conversion kit does.
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Senior User
Joined: Jun 2006
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From: Murfreesboro, TN
Originally Posted by EPNCSU2006
I ran an 89-93 mustang mass air computer on my 87 truck for a while. I just rearranged the injector order to match the engine firing order. This is exactly what the Ford Motorsport mass air conversion kit does.
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Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
Originally Posted by EPNCSU2006
I ran an 89-93 mustang mass air computer on my 87 truck for a while. I just rearranged the injector order to match the engine firing order. This is exactly what the Ford Motorsport mass air conversion kit does.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
I have the FMS mass air kit on my 351 and it runs great. If I'm not getting full potential from my combination I wouldn't know it, there are no codes or any indication the motor is limited.
And you will need the mustang injector harness to run a mustang computer on an early truck. The trucks are batch fire with only 2 injector wires, the mustang computer has 8 seperate injector wires, which is what you need to make it sequential.
And you will need the mustang injector harness to run a mustang computer on an early truck. The trucks are batch fire with only 2 injector wires, the mustang computer has 8 seperate injector wires, which is what you need to make it sequential.
Lead Driver
Joined: Nov 2002
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From: Concord, NC
Right, not to confuse anyone, I re-wired my original truck harness to include the sequential injection, canister purge, mass airflow sensor, and other couple of changes to match the mustang computer. As for the out of sequence cylinder fire, it shouldn't be a problem with how I had it setup because I was using only one O2 sensor in the stock location to feed both of the O2 sensor inputs on the mustang computer. The FMS kit does the same thing with the O2 sensor inputs, so it should be fine if they do it that way. Sorry for any confusion by not going into detail earlier.
Senior User
Joined: Jun 2006
Posts: 388
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From: Murfreesboro, TN
Originally Posted by EPNCSU2006
Right, not to confuse anyone, I re-wired my original truck harness to include the sequential injection, canister purge, mass airflow sensor, and other couple of changes to match the mustang computer. As for the out of sequence cylinder fire, it shouldn't be a problem with how I had it setup because I was using only one O2 sensor in the stock location to feed both of the O2 sensor inputs on the mustang computer. The FMS kit does the same thing with the O2 sensor inputs, so it should be fine if they do it that way. Sorry for any confusion by not going into detail earlier.
Lead Driver
Joined: Nov 2002
Posts: 9,555
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From: Concord, NC
You're right. I just took that one signal wire and split it into two, running one wire to each of the two inputs on the mustang computer. I used the mustang computer wiring diagram from Bjorn Brembs' webpage: http://brembs.net/cars/maf_conversion/ . The link to the mustang wiring diagram is about half way down the page.