No mass air
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Freshman User
Joined: Jul 2003
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From: Golden CO
No mass air
My 1995 f-150 302 does not have a mass air but a S/D. Does this make intake upgrades less usefull as the computer will not be as capable of adjusting for them? If so can i get a MAF that plugs into the computer and solves this problem?
Post Fiend
Joined: Nov 2002
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From: Memphis, TN
No mass air
MAF isn't a plug-in. You have to rewire the engine compartment and buy several parts to convert.
But there are as many people doing heavy mods to MAP(SD) systems as MAF, so tell us exactly what you have in mind.
But there are as many people doing heavy mods to MAP(SD) systems as MAF, so tell us exactly what you have in mind.
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Freshman User
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From: Golden CO
No mass air
I am planning on adding a k and n system and i thought of incorporating ram air through the bumber holes. then i was going to add headers and a cat back. my consern was that with no MAF the computer might counter act my intake modifications.
Post Fiend
Joined: Nov 2002
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From: Memphis, TN
No mass air
That's not enough change to mess it up. Hvae you read Project MPG? There won't be enough ram effect to notice.
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Freshman User
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From: Golden CO
No mass air
The ram idea was more of a cold air idea, any other suggestions for a few cheap horses? and how much eo headers do i've hear the exhaust manifolds are not that bad on these and that headers may not amount to much. I also do not know how much backpressure i need to leave would headers to dual high flow cats and packs with 3 inch pipes take too much off?
Senior User
Joined: May 2003
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From: San Diego
No mass air
If you make changes to the intake manifold with the map system, you must make sure to have at least 20in vacuum at the map signal take-off point, otherwise your pcm will cause problems.
The map monitors intake vacuum which the pcm uses to calculate air flow. If you change the vacuum readings, hence the airflow calculations, you will alter and possibly destabilize the control loop used to run the engine.
Regards, Robert.
The map monitors intake vacuum which the pcm uses to calculate air flow. If you change the vacuum readings, hence the airflow calculations, you will alter and possibly destabilize the control loop used to run the engine.
Regards, Robert.
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Post Fiend
Joined: Nov 2002
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From: Memphis, TN
No mass air
Originally posted by mpmitche
any other suggestions for a few cheap horses?
any other suggestions for a few cheap horses?
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Thread Starter
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Freshman User
Joined: Jul 2003
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From: Golden CO
No mass air
is there a simple way i can put a vacuum gauge in to tell me my manifold pressure (attach it to the pcm maybe) and is that the same as the map signal takeoff point pressure. i would think all my mods would want to boost manifold pressure not decrease it.
Post Fiend
Joined: Nov 2001
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From: Topsfield, MA
No mass air
Any exhaust mods don't effect the fact that you have a speed density system. I have an actual ram air setup with K&N filter. If you changed intakes, cams, heads, etc then you need to be concerned about S/D. You'll be fine that way. If you planned on heads/cams/intakes and stuff, it is possible to get a chip burned for the computer to compensate.
Senior User
Joined: Feb 2002
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No mass air
Actually you can get a plug and play mass air conversion from Ford,but it's $700.You can do it cheaper if you scab the wiring in yourself.Take it from someone who has been there,if you add a cam or heads convert to mass air.Or you will have to get an adjustable fuel pressure regulator and **** on the fuel pressure to lean it out.The lower vacuum will make it run rich.
CB
CB
Lead Driver
Joined: Nov 2002
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From: Concord, NC
No mass air
I don't want to hijack the thread, but I'm interested in converting my 87 to mass - air (I've got a thread in the computer section of the board and have gotten good replies, but not all the info I am interested in). I'd like to know what parts I need to do the conversion myself. I'm good at figuring things out so that won't be a problem, and I'm up for a good challenge. I would like to know what the difference is between MAF meters for 89-95 and MAF meters for 96 and newer, and if they will interchange with slightly different wiring. I know early models are for the 5.0, and later ones for the 4.6, but don't know how or if that would change calibration. Thanks.
Post Fiend
Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
No mass air
There was no truck MAF before '94, so I'd advise collecting '94-95 EEC-IV MAF components so you can just bolt on stock parts. It'll make diagnosis & maintenance MUCH easier on you. Avoid '96 parts since they MIGHT be specific to OBD-II MAF.