MAF Sensor Location Question - Boosted 7GC only!

[compsciboi]

Turbo Kit from C2 Power.

Car used to have serious idle issues so I took off the MAF and cleaned the connectors. Car idles a little better - but I am going to redo the hot side of my I/C setup and was looking at my setup.. Wouldn't it make sense to have my MAF on the intake BEFORE the turbo or is it causing issues right before the throttle body intake after the I/C on teh cold side of hte piping?

Should I relocate it to the intake before the turbo?


I recently had a guy redo my oil feed line on my car and he thought it was odd to see the MAF there. He has a MKIII 600 HP Supra. Toyota Certified and all.


Any input, I would greatly appriciate it.

Also, small ? What A/F are you other boosted celicas running? Does anyone have a video of them inside the car while going through gears and showing the RPMS and wideband numbers?


thx!

[cool2miketlu]

I had problem when I had my MAF before turbo on the intake side, but once i put it after the BOV everything works great.
Do you have recirculating BOV? If it vents to atmosphere then you need your MAF after the BOV. Reason is the MAF measure the specific amount of air when it passes the MAF, if the BOV is behind the MAF and it vents to atmosphere the MAF reads a lot of air but engine is not getting that air when BOV vents extra pressure meaning engine inject too much fuel... You can have your MAF before the turbo if you recirculate the BOV after the MAF so the measurement of air is accurate.
I know it sux to clean your MAF often, but having a car running great is worth that small inconvenience.

[compsciboi]

The MAF is located right before the throttle body AFTER the BOV and not it's not recirculated. So should I leave it be?

[blinding-gts]

Leave it where it is then. It's in the most ideal location to measure an accurate amount of air flow before combustion occurs. You can still recirculate the BOV to keep the air trims more linear but it most likely won't be needed.

[cool2miketlu]

You only recirculate it if you do change the MAF onto the intake pipe before the turbo, if your MAF is after turbo and after BOV then you are fine the MAF is getting accurate readings.
Now the more space you put between your BOV and MAF the better.

[compsciboi]

Thanks cool2miketlu.... :)

[compsciboi]

Ok, so recently re-did the hot side of intercooler piping with all new I/C, high temp silicone couplers and t-bolt clamps.

The routing is SOOO much better!


Question:


I have a e-manage blue. If I go to a MAP ECU, I can remove the MAF and redo the cold side of the I/C piping - do you think my car will perform any better?

[compsciboi]

Anyone? Recommend going to a MAP ECU and removing the MAF? Smay?

[cool2miketlu]

All this has been talked about before.
MAP do not have temperature sensor, if you use that then when atmosphere change the management would not know it. Your car will run lean or rich every time temperature changes, so your car would run like crap or run dangerously.
BTW this is what I read not sure if it is right because I never tested this but it was from good source...

[Boosted2.0]

Anyone? Recommend going to a MAP ECU and removing the MAF? Smay?


Just get the Hydra if you want to go that route - it runs off MAP (speed density) not MAF. FWIW every 2ZZ making over 400 HP that I've seen still has the MAF in it.

[Smaay]

i have looked into the MAP ECU and the Supra guys love it. i would have jumped on the bandwagon but i dont think it will control the VVT or lift. so i shined it. you can get the temperature reading from the MAF if you wanted still. what i did on my Supra and All-Trac is install a GM MAP and intake temperature sensor in the manifold right after the throttle body. but on the celica, i dont think it will work out again cause of no VVT and lift support