Maf placement after the intercooler

[Onalky87]

Anyone ever do this? Was talking to this guy who said that's where he puts it right on the bottom of up pipe when he tunes TB's He said"it only makes sense that u would wanna Tune using and monitor the air temps that are going into the motor, instead of air temps the car never sees"

does this theory hold water?

 

[1quick6]

I am no expert in this area, but it would seem to me that there would be far too much turbulence being in that location. Being that close to the throttle body doesn't really seem like a good place for it because of turbulence and the possibility of sending air back through when the throttle is closed quickly. Also, I can't see how the maf could read correctly since this air will be at a much higher velocity than pre-turbo air.

I'm interested now ... maybe an expert will drop by.

 

[Razor]

You mean air temperature sensor not mass air flow sensor. The MAF does not read temperature.

Next flaw is the chip on the Buick only reads the temperature and doesnt make any changes to the tuning based on that sensor. It does how ever make changes using the coolant temperature sensor.

Doesnt matter if the IAT(intake air temp) sensor reads 30 or 140 on a Buick with a stock computer. Unless you have a chip custom programmed to make changes.

 

[Razor]

Wanted to add to this quote "The MAF does not read temperature"

" on a Buick application" thats why it has three wires not 5 wires. MAF's that read temp are 5 wire.

 

[Onalky87]

Thanks razor. Remind me to not let this guy tune my car

 

[notacarlo]

Don't let that guy tune your car.

 

[TurboBob]

actually a 'blow thru' MAF can work really well.

You have to use one of the aluminum bodied MAFs, the plastic ones will shatter.

when installed after the intercooler, you usually have to use reducer hoses, which alters the calibration of the MAF.

So you will need the ability to tune around this, the MAFt Gen-2 or Translator Pro will do it.

TurboBuRick on this board has his car tuned this way and it runs excellently.

Bob

(note, backflow thru the MAF when the throttle is closed happens when the MAF is in the stock location, it does not happen in a blow-thru setup)

 

[delcowizzid]

all of us over here in newzealand and aussie use the maf in the cold side of the cooler when we do turbo conversions and we use the factory supercharged tune same gets done with the l67 when we go intercooled due to the maf being to far away from the throttle with all the pipework they work great.i know not a gn but similar setup and stock tunes.the bonus is the ecu actually sees the true mass of air when its cold and more dense we run our air intake temps sensors right there beside the maf cause its used in calcs for air density and timing as well

 

[Onalky87]

Hopefully we get more people who have done it to chime in Either way I don't think I can do it with my 4" ls1 z06 maf

 

[speedskills]

This should be interesting. Two experts with different opinions. Maybe Turboburick will chime in and give his explanation. Stay tuned folks.

 

[RmvBfrFlght]

Can find additional information on MAF relocating here:

MAF Relocation

Also note the IAT sensor in the plenum right behind the TB.

RemoveBeforeFlight

 

[Onalky87]

hMmmb after reading phase to I'm thinking about that if nothing else Im gunna shorten my 4 in intake pipe and re attach the filter. Doing this on the side in between the filter and maf not maf and turbo. This will put my filter right close to my maf.

What do the experts think?

 

[Onalky87]

hMmmb after reading phase to I'm thinking about that if nothing else Im gunna shorten my 4 in intake pipe and re attach the filter. Doing this on the side in between the filter and maf not maf and turbo. This will put my filter right close to my maf.

What do the experts think?

Anyone care to voice there opinions?

 

[TurboBuRick]

It's all trial and error. Give it a shot and see.

I can say that running blow through works well. I been running this way for a while. It's hard to beat the drive-ability. No throttle lift richness. Very responsive.

Like Bob says, you will need a way to tune. The calibration around idle will be different.

IMO blow thru is the best way to run next to speed density.

HTH