Festy VAF in a B6?

[TominMO]

I have a B6 swap in my blue 1990 Festiva, courtesy of Greg. He also seems to have replaced the muffler with something else. Anyway, recently the VAF went out in it, and I found a good 323 one from the JY. But I am wondering if a Festy one can be used. Since the B6 is the same motor as the B3, only bored out, and all my ignition parts are stock Festiva anyway, could I just as easily use the Festy VAF? Has anyone done this with a B6, and if so how did it run?

BTW, according to Rockauto, the following VAFs are the same:
Kia Sephia, 1994-95
Mazda 323, 90-95.....323 DX, 92-94.....323 SE, 90-93
Mazda Miata, 90-93
Mazda MX-3, 92-93
Mazda Protege, 1994

These VAFs are the same as each other too:
Chevy Nova (Corolla), 1988
Ford Festiva, 1989 (EFI auto obviously)
Mazda 323, 1986-89
Mercury Capri, 1991-94
Mercury Tracer, 1988-89
Toyota Corolla FX16 and FX16 GTS, 1988
Toyota MR2, 1987-89

Guess I answered my own question, sort of. So now my question is, has anyone used the Festy VAF with a 90-95 B6 motor, and how did it run?

[iceracerdude]

Yes, I've run a festy vaf with my b6, and I'm running an aspire maf on it right now.

[Pu241]

What about the 90-93 VAF's, are they the same as the '89 then?

[Safety Guy]

One would think a B3 VAF would optimize the B3 performance, and the B6 VAF would optimize the B6, etc. Methinks only swapping VAFs/MAFs and recording several tankfulls of gas will tell the real world differences, if any. To eliminate weather and driving conditions, I'd swap back and forth at least three times each VAF and try to drive the same way for the entire test period, keeping an eye on tire pressure and other variables to ensure they don't mess up the results.

Karl

[TominMO]

Yes, I've run a festy vaf with my b6, and I'm running an aspire maf on it right now.

And it runs fine with all of them? What year was the Festy VAF?

What about the 90-93 VAF's, are they the same as the '89 then?

According to Rockauto, the 90-93 Festiva VAFs are unique to Festys, and apparently different from the '89.

One would think a B3 VAF would optimize the B3 performance, and the B6 VAF would optimize the B6, etc. Methinks only swapping VAFs/MAFs and recording several tankfulls of gas will tell the real world differences, if any. To eliminate weather and driving conditions, I'd swap back and forth at least three times each VAF and try to drive the same way for the entire test period, keeping an eye on tire pressure and other variables to ensure they don't mess up the results.

Karl

Great idea. Too much work for me tho.

[blkfordsedan]

The VAF is just a sensor with a variable voltage output. It doesn't care what year or size engine is behind it. The main thing is that the ECU will work with the input voltage range from the VAF and can correlate the signal to the proper air mass. There may not even be any operational differences. With the Rock Auto interchange, the differences could be physical and not operational (but I could be wrong).

[iceracerdude]

The VAF is just a sensor with a variable voltage output. It doesn't care what year or size engine is behind it. The main thing is that the ECU will work with the input voltage range from the VAF and can correlate the signal to the proper air mass. There may not even be any operational differences. With the Rock Auto interchange, the differences could be physical and not operational (but I could be wrong).

This is correct, the part numbers are the same on some of the mazdas.

And it runs fine with all of them? What year was the Festy VAF?

1990

[sketchman]

Yes, I've run a festy vaf with my b6, and I'm running an aspire maf on it right now.

Could you elaborate on this? According to my Haynes manual, VAF vs. MAF(hot wire) output is totally different. What did you have to do to make this work?