Just for giggles where did all the boosted people put their MAF meters? Did you put it on the charged side or the non charged side of the turbo/supercharger?
She drives like crap till it warms up, I think its the distance the air has to travel before it reaches the TB. What are your thoughts? Don't hold back.
Choray

 

Charged side for me. As long as the piping is straight going into the MAF, there shouldnt be any problems.

 

That was quick!

 

I've run a Z32 maf both ways. When I had it on the non-charged side, it was not far enough away from the blower inlet and it would detect back flow whenever I lifted off the throttle. The pressurized air in the boost pipe has to go somewhere when you lift off the throttle, so it goes back out the inlet. The maf would detect it and the ecu would trigger the injectors. I sooted up a set of plugs in a couple hundred miles. Moving it to the pressurized side fixed that problem. And despite JWT's warnings about running a Z32 maf on the charged side, my maf has been working fine for over two years now.

 

Mines Not charged... works fine for me, Z32 MAF

 

Charged for me. Not bad at all.

 

Non-charged side. It seemed to give me better readings but that could be because I hacked one maf and stuck it in the metal pipe. There were size changes and small stupid problems everywhere (basically a very poorly designed intake pipe). My whole setup could be a lot better though. I just need some lights in the garage and some time to work on it... oh yeah and some money... and I could probably make it all much better.

 

Charged side. No isseus.

 

I'm curious if you have datalogs or can remember what changes occured with the maf voltages when moved it. I'm considering a blowthru on my turbo to clean up some piping issues. The mustang guys find that the maf voltage goes up higher when it's on the charged side.

 

It would. The maf measures the heat dissapated by the resistor by measuring the voltage drop across it. Your car would think the ambient temp is hotter than it actually is because of the heat transfer from the turbo to the incoming air.

 

I may have had some comparisons, but the computer I had all that data stored on suffered a hard disk failure recently. I don't remember a significant difference in maf voltage, though.

Why would the Mustang maf provide more voltage with hotter air? Seems like it should be the other way around, since hotter air cools the resistor less than cold air, resulting in less voltage.

 

I noticed when my MAF was on the charged side the S-AFC would read percentages well over 50% all of the time at only 7-8 psi. On the non-charged side I've not been able to bring it past roughly 45% at the same 7-8 psi. This could easily be due to piping and such and most likely is the reason but I'm not positive.

 

Of course this shouldn't be a reason, but in my case it was: I was glad I had my MAF on the downstream side of the blower because my MAF screen acted as a secondary (primary?) filter after my SC ate a sock that I had over the inlet.

 

Yeah, if you blow out the guts of your setup, that will keep most of the stuff out of your engine.

 

yeah the voltage does seem to read higher on the charge side. Im on the non charged side with z32. Seems to work fine with me

 

Yup, it can't hurt to have an extra line of defense. Sure, the sock thing was my fault. But a similar incident happened, which was out of my control. The rubber gromet that fits in the stock pancake filter which connects the crankcase hose to the filter, got sucked into my blower. I found small chunks of black rubber and powder at my MAF screen.

 

charged side

 

No MAF .. MAP only . When I ran a MAF it was on the non-boosted side. There are arguments both ways though.

MAF on charged side -
Advantages:
Accurate airflow - If BOV before MAF then don't worry about stalls or setting S-AFC or emanage "dec-air" function.
More accurate inlet temp to intake manifold.

Disadvantages:
More difficult(not impossible) to prevent leaks between MAF and piping after the MAF.
MAF was not really meant to run boosted so questionable whether or not it is less reliable. You now have boosted air through it. Many have run fine for long periods of time. Mine has not yet given up on the unboosted side though.

MAF on non-boosted side:

Kind of the opposite to that listed above.

 

Hey Nigel can you please give me a call when ever you get this(832)814-8868,I have some thing to ask you,but your email doesn't seem like working,thanx!


Mine was on the non charge side,stall when ever I left off the gas quickly(I know I need to hook my emanage up,LOL),but car seem to run fine.

 

Mine is on the non-charged side and don't have any problems. Have have noticed that some people that run it on the charged side will pop check engine codes for some reason for MAF but all and all either way will work.