Contour Enthusiasts Group Archives Forums Modifications Forced Induction MAF location

just making sure here...

the maf is placed in between the air filter and the compressor.....right?

why wouldnt it be after the compressor just before the intercooler?

It depends upon what your software is set up for. Suck-through or blow-through.

For the Contour, because we have a hot wire MAF, it is a better idea to use a bypass valve with a suck-through system.

That way all of the air is being metered. If you try to use a BOV with a suck-through system, you run in to a temporary rich situation. Your PCM thinks your engine is using a bunch of air, when you're actually just venting it.

HTH,
BP

Blow through with a Hot-Wire MAF is not a good idea as it'll slowly coat the wires in oil giving you worse and worse MAF readings.

I have an ADC chip and im doing further tuning with greddy E-manage. I also am going to use a HKS SSQV blow off valve.

I planned on placing the maf just before the compressor, and having the BOV 12-24" from the TB (i was told this is ideal BOV placement)

i dont mind the temporary rich reading...unless it has long term damaging effects....

Who told you 10-24" away and why? I don't have a problem with it but i was just wondering why. I would put mine on the short side of that since you won't have 24" to play with considering your compressor discharge to the throttlebody distance will be like 24" TOTAL, including the path through the intercooler.

Also, I put my MAF in the fender with the filter. I have a pic somewhere.
It keeps everything cool and it gives no driveability issues. You have to lengthen the MAF wires by cutting the plug with a few inches of wire and then adding in about 12" of wire. Make sure to solder the ends of the wires so no corrosion builds up. Also there isn't that much room and you will do better not to have it in the way if it isn't necessary.

That's what I was thinking. I don't even have 24" of pipe between the Turbo and TB.

My BOV sits about 5-6" from the TB and works perfect.

he said in another thread somewhere that he is going with a front mount so he will have alot of piping

Still, why would you mount it so far from the origin of the reversion pulse? I would stay with 12" for the fastest, most effective, venting.

Yes, I'm going with front mount. I don't feel like bothering with water lines and pumps for a water-air intercooler. Front mount looks badass and im very aware of the pressure drop along the length of the pipes. My Spearco core I got has a .2 pressure drop, so that isnt too bad.

I know a tuner here in town, and from his general experince he told me that the best BOV placement is 12-24" from the TB.

Now, I am going to put the maf as close to the fender as possible. And the BOV will be close to the TB, i didnt want to place it more than 12-14". I'll show you guys in pics once i finish putting this thing together. Hopefully in the next 3 weeks.

Thanks for the help guys.

I'll post up a pic of my current setup tonight