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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 03-09-2008
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Aftermarket MAF?

I was just looking around this morning at stuff and I found an aftermarket (Jet) mass airflow sensor for my truck. Is there any point to getting one of these? I mean I have an intake and a throttle body, but I have a feeling they are just selling the product when they say that it optimizes a CAI. Anybody had any experience with them?
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Old 03-10-2008
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I'm not sure if you'd gain much at all on a stock long block.

I'd maybe go look into what the mustang guys are doing.

Rich
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Old 03-10-2008
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Visit Waynes site UnderdogPerformance. He and Fred have developed a replacment MAF that allows you to convert the older style "pillar" MAFs to the newer style "wafer" MAFs.

If you don't know Wayne is a vendor here. You can find posts on this in the Vendor area of the board.
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Old 03-10-2008
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those are for the 3.0's right now John.....


unless you need/have a need for a lot of incoming air, then you wont need an upgraded MAF........remember, you need to be exiting as much air as you are taking in....
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Old 03-10-2008
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Ya I mean I know it prob. wouldnt help much but the thing is that I have the throttle body (66mm) and I was just thinkin it may not be letting as much air as it could if the MAF is holding it up. But I guess the engine can only take in but so much air anyways..thats the things I really dont know
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Old 03-10-2008
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if you have a full exhaust (headers on back) along with the larger TB, then i would get a MAF....
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Old 03-10-2008
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i am looking for 1 to fit a 08 4.0 to improve gas miliage,also the more air in the more power it can make,the maf is very constrictive
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Old 03-10-2008
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All I did was a CAT back, and the MAF mod made a huge difference. An aftermarket MAF would do similar. There is significant restriction in the factory MAF, though less so in the 4.0 over the 3.0.
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Old 03-10-2008
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Quote:
Originally Posted by nickster View Post
i am looking for 1 to fit a 08 4.0 to improve gas miliage,also the more air in the more power it can make,the maf is very constrictive
From what I understand, the 4.0 MAF is high flow. 1/2 shafting the throttle body or an aftermarket TB would probably do more than an aftermarket MAF in your case.
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Old 03-10-2008
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Quote:
Originally Posted by nickster View Post
i am looking for 1 to fit a 08 4.0 to improve gas miliage,also the more air in the more power it can make,the maf is very constrictive
you are 1/2 correct....

your engine will only take in as much air as it can put out through the exhaust.....a larger MAF or TB will not do any good until you upgrade your exhaust system (headers, cats, muffler)....

even after an exhaust upgrade, the stock 4.0 MAF is sized well.....a larger MAF is hard to tune on the 4.0's from what I have heard......


But if you are looking for one, any Mustang 4.0 throttle body will work on a 4.0 SOHC Ranger with small modifications to the throttle cable mounting points (i believe that is where the mods need to be done are)...


Quote:
Originally Posted by n3elz
From what I understand, the 4.0 MAF is high flow. 1/2 shafting the throttle body or an aftermarket TB would probably do more than an aftermarket MAF in your case.
you sir are correct....

the 4.0's MAF is sized well for the stock 4.0...even for a 4.0 that has a good exhaust system, it is a good size.....
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Old 03-10-2008
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And you're right about the exhaust. I don't think the pipes are any bigger on the 4.0 than they are on the 3.0. Definitely a candidate for some improvement I imagine.
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Old 03-10-2008
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any larger exhaust piping than 2.5" on any Ranger is a waste......you would lose too much back pressure....
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Old 03-10-2008
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we should be moving forward with a 4.0 maf soon. The holdup is dollars from the wiring harness. Because of the qty's, the dollars for the pigtail to hook up our MAF Housingto pre 2004 vehicles is significantly more than the MAF housing itself.

getting an aftermarket maf/maf housing means the same amount of money if it goes bad. Our system uses the newest sensor from Ford. The good part is replacement can be as little as $10-$20 from a wrecking yard if the sensor goes bad. I;m not sure that is the case with Jet.
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