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View Full Version : swapped MAF (V6 N/A) for a VR4 MAF: better! (or just in my head?)



MarkSanne
08-08-2015, 12:57 PM
At some point in time I must have accidentally swapped in V6 N/A MAF in my VR2. It drove without issues but... when I found out I had the wrong MAF, I was curious to see what the difference would be. If any at all. So today I received a clean VR4 MAF, and besides the obvious difference in the air stream honeycomb flow mesh (V6 N/A) vs the square mesh (VR4) it all looks pretty much the same.

So I swapped the VR4 in, did a proper test drive (even quickly hit the 200km/h mark) and drove it around for some time in various speeds and varying in driving style from lazy, normal to sporty and I could not suppress the feeling that it all felt smoother, quicker, less jerky when suddenly letting go of the loud pedal.

Could very well be in my head, but... that counts as a win too, one less thing to 'worry' about :)
The correct MAF for this engine, so all is well.

Would be interesting to learn if anyone could relate to this, has the same experience or could think of reasons why this would be either non-sense or has ground for proof :)

Grid
08-08-2015, 04:32 PM
At some point in time I must have accidentally swapped in V6 N/A MAF in my VR2. It drove without issues but... when I found out I had the wrong MAF, I was curious to see what the difference would be. If any at all. So today I received a clean VR4 MAF, and besides the obvious difference in the air stream honeycomb flow mesh (V6 N/A) vs the square mesh (VR4) it all looks pretty much the same.



Some reading I recently did on the subject:
http://www.clubvr4.com/forum/showthread.php?51334-The-difference-between-NA-and-TT-MAFs
https://www.revvolution.com/auto-forum/mitsubishi-maf-sensor-information-p-354
http://www.club3g.com/forum/3g-eclipse-general-discussion/162687-all-you-ever-wanted-know-about-our-maf-s.html
http://www.club3g.com/forum/3g-eclipse-general-discussion/222305-dissection-501-maf.html#post4105649

Bottom line is that the MAFs are designed for different airflows, and scale Hz differently. Swapping in a different model MAF may work but also may result in lean or rich operation, power issues if the MAF saturates and the engine keeps going. The ECU has a map which goes with a particular MAF model. When changing the model you should change the ECU map as well.

In your case since your VR2 has a 6A13TT engine and ECU (I'm assuming) you should also use the proper MAF, or reflash your ECU to match. But the proper mappings may be hard to find...

Can you share some photos of the casings of your MAFs? The N/A and the TT one.