Contour Enthusiasts Group Archives Forums General General I Need a SVT MAF

Anyone selling their stock SVT MAF (from a 1999 if it makes a diff), I'm intrested. My e-mail is Britskw@hotmail.com
THanks!

They're all the same. SE/SVT. I've got a used one off my SE if you want it. Nothing wrong with it. Just wanted a new one. I'll let ir go cheap.

todras@yahoo.com

Not true.

MAF's are calibrated to the injectors.

SVT MAF = 19lb
Non SVT = 16lb

SVT MAF's can be found at Fordpartsonline.com for ~$90
Pro-M 75mm for twice that (and well worth it IMO!)

Yea, calibration is ENTIRELY different... hate to break it to you. If you don't think so, then try one out

That's right. Same size though.

Yeah, Physically there the same size.

Here's how the OEM MAF specs work (I can't talk to aftermarket units).

For a given year, the MAFs ARE the same between SE and SVT. In fact, the same unit (part #97BB-12B579-AA) is used for all 98/98.5/99 V6s. The injector calibration diffs are internal to the EEC.

For 2000, things changed. The Contour got a new fuel system, with a new injector type. So the MAF changed for all 2K V6 models, part # F6DF-12B579-EA. But again, it was a global change.

So you don't have to worry about SVT/non-SVT, just don't mix 2000 and pre-2000 MAFs.

Clear as mud?

If the PCM controls the MAF's calibration.

Why do aftermarket MAF's need to be calibrated to the injector size???
Why would it matter if the PCM controls the injector sizing?

Wouldn't the aftermarket MAF's need to be calibrated to the PCM then???

My understanding of this from the Mustang 5.0 world is that if you increase your injector size, you can use an aftermarket MAF specifically designed to "fool" the PCM into working with the larger injectors.

Alternatively, you can leave the MAF alone and use the EEC-tuner or something similar to edit the tables in the PCM relating to injector size. (This is by far the better way of doing it, assuming that the stock MAF flows well enough).

The MAF by itself has little to do with injector size--so long as it can handle the flow rates required by the engine it's attached to without maxing out. The injector size is determined by the PCM programming.

As a point of reference, the MAF used by the 89-93 Mustang 5.0 was also used in a number of different applications, including the 3.8L V6.

So, to recap:

1)In aftermarket applications, the MAF does determine the injector size, but only when you want to fool the PCM and are using larger-than-stock injectors.

2)In stock applications, the MAF has nothing to do with injector size, it is handled by programming in the PCM.

3)It is possible to reprogram the PCM with eec-tuner or similar devices for larger injectors without changing the stock MAF, assuming that it is adequate OR I think if it is not you can buy a larger MAF that has the same curve (??) as the stock one.

Brian

The differece is aftermarket vs. OEM. Aftermarket will send out a lower signal meant to correspond with the injector size difference from stock to bigger. OEM takes care of the calculations in the PCM software. Makes sense, so you can use one part number over a variety of applications interchangably. The fewer individual part numbers you need to manufacture, the cheaper it will be. Flashing the PCM software is a much easier way of controlling that variable, instead of putting it in hardware. I know for sure that Ford doesn't manufacture anywhere near the number of MAF P/N's required to have a different setup for each engine/injector configuration.

I'm not sure if this is totally correct, but it is my understanding of the situation. If any Ford types (like Rara or someone else in the know from an OEM standpoint) wants to tell me I'm off base, then I'll believe them no questions.