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Discussion Starter #1 (Edited)
I have a JRSC, and I'm putting together a bbk.

I don't have a maf, supposedly the kit came with one.

I've searched all over the place to try and find answers .

Is the Maf from the 03 6.0L diesel the same as the bbk Maf?

I know someone running a stock svt Maf , with no issues.


I've read this online


" No Ford OEM MAF is calibrated for specific injectors. The MAF has a flow curve which is stored in the ECU as are the settings for the injectors."

Which I found on a mustang site, where people use cobra ecu and 24# injectors the cobra uses , instead of their stock #19 injectors. And they use stock mafs, because the flow curve and injector size is in the ocm




So is the bbk "ACTUALLY" different?

Is the bbk the same as the diesel Maf, right out of the box

Which is what's confusing me on if I actually need a different Maf. Or if ford sold one with the kit to make a few more bucks.
 

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EDM Specialist
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The quote you posted implies that the MAF itself is not tuned; rather the PCM is tuned for the specific MAF. Yes, the BBK/diesel MAF is different from the stock one in that it can read higher airflow and translate it to a variable voltage signal. A stock MAF has the potential to be clipped, which basically means that at some point it will be sending the max signal it is designed to send, despite more and more airflow entering the engine. This can lead to a lean condition.

Whether this actually happens on a supercharged SVT with a stock MAF, I don't know for sure. Someone else here may know.

There are three facts here:
-You're swapping the PCM to one with a JRSC+BBK tune.
-You're not dyno tuning.
-You don't have the BBK MAF yet.

The real question is whether or not the diesel MAF (which is identical to the BBK MAF by part number) can be used without affecting the tune in the PCM.

That is something I don't know, so hopefully someone else here can answer.
 

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Bacne..
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The physical MAF is simply a measuring tool.
All calibrations are stored in and controlled by the PCM, heater duty cycle, temperature, etc. etc.

When you see something to the effect of 'MAF tuned for 24#/hr injectors', this means the MAF has been opened up and the circuit board inside has been modified. This is done to 'scale' the output voltage so the fueling becomes correct. Which is a band-aid for a good tune, and should never be done,,, makes tuning that much harder.


So, if the DSL MAF is the same as the BBK MAF and you're using a BBK tuned PCM ... I don't see why it wouldn't work pretty well right off.
But I would datalog and have someone verify that the car is running well before putting it through it's paces too much.
 

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Discussion Starter #5
From what I've read. An OEM ford Maf is not able to be re calibrated.

Something such as an aftermarket pro M or sct Maf can be.
 

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how can this be true if people are using stock mafs running 60 and 80# injectors? the got to be calibrated through the ecu doesn't? I know they run a MAFia so the maf doesnt peg out but the tuning is what affects this overall isn't it?
 

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Discussion Starter #7
The point is the bbk Maf was an OEM motorcraft MAF sensor. The question is, is the diesel Maf the same.
 

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I could've sworn Steve had posted the part number here and I can't find it anywhere. I'm pretty sure you'll be fine getting the diesel MAF, though.
 

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Bacne..
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From what I've read. An OEM ford Maf is not able to be re calibrated.

Something such as an aftermarket pro M or sct Maf can be.
Pro-M uses Ford MAF's (I have 2 of them).


how can this be true if people are using stock mafs running 60 and 80# injectors? the got to be calibrated through the ecu doesn't? I know they run a MAFia so the maf doesnt peg out but the tuning is what affects this overall isn't it?
As I said, both can be done, opening the MAF and altering it and tuning through the PCM.
I'm using a MAF tuned for 24# injectors by Pro-M and the car has 42# injectors. I had to adjust the MTF in the PCM.



I could've sworn Steve had posted the part number here and I can't find it anywhere. I'm pretty sure you'll be fine getting the diesel MAF, though.
This.
 
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