blow or suk MAF ?

[Jes]

i did some searching, and though i didn't read all the posts, i didn't find info on this, though i know its here somewhere .

i'm adding a PowerStroke FMIC to my ride. i don't know where i should put the maf. should i suk through it, or should i put it after the cooler ? pros/cons of each ?

thanx, happy t-day

 

[TurboDave]

bruce on this site, I think has the blow through setup pretty much down to a science. Hopefully he'll pipe in here.

 

[bruce]

Originally posted by Jes

i'm adding a PowerStroke FMIC to my ride. i don't know where i should put the maf. should i suk through it, or should i put it after the cooler ? pros/cons of each ?

To go blow thru means using a translator or T+, and using an late model MAF. The stock plastic ones, won't take the forces of being pressurized.

The late model MAFs have there own temp compensation in them, so by going blow thru the system automatically compensates for the I/C heat saturating.

Turbos are better at pushing air then drawing it in. Going blow thru increases the flow potential. In low situations air turbulence just around the filter can lead to erratic MAF signals.

There are no downsides to it.

Well, if you have an problems they might become more apparent. ie being out of injector, and with the increase of air flow you have to back the boost down due to being lean.

 

[Jes]

this translator or T+, is it to adapt the late model ls1 type maf's to the GN computers ?

"air turbulence just around the filter can lead to erratic MAF signals. " yeah, i know what you mean there.

thanx

 

[Dan Thompson]

Yes

 

[BJM]

The only possible problem is if your intake air temp rises anywhere close to the operating temp of the little resistors in the MAF. The closer the air gets to that temperature the more sluggish the MAF response will be. If the air temp exceeds the MAF operating temp then the MAF will be totally messed up with its output.

In a previous thread someone alluded to the fact that the resistors operate at 70C or so and that they had never seen intake temps go that high before. I hope whoever that was might chime in to this thread.

 

[blackbuick87]

Bruce I smell a marketing idea here. The first GN MAF relocation kit

 

[bruce]

Originally posted by BJM
The only possible problem is if your intake air temp rises anywhere close to the operating temp of the little resistors in the MAF. The closer the air gets to that temperature the more sluggish the MAF response will be. If the air temp exceeds the MAF operating temp then the MAF will be totally messed up with its output.

In a previous thread someone alluded to the fact that the resistors operate at 70C or so and that they had never seen intake temps go that high before. I hope whoever that was might chime in to this thread.

It's not a concern.
The sensor operating temps are much hotter then that.
The sensor's resistors run hot enough to burn small carbon accumulations off of them. Maybe they're just hot enough that the carbon doesn't stick. Either way they're really hot.

I've seen actual MAT temps of 190dF and the MAF's response looked just the same as in lower temp logs.

 

[TurboTommy]

Hey, that's exactly what I was concerned with in my posting!

I'll say it again...thanks Bruce, you're awesome!

 

[boostcreep]

I just noticed some stars in the upper right corner of this thread. Does anyone know what this means? Some threads have them and others do not.

Nick

 

[Jes]

that means someone "rated" this thread.

...............

it looks like i'm going to blow it. i really don't think the intake temps are going to be much higher than ambiant, after all, the idea of using the cooler is to lower temps.

 

[boostcreep]

Ah, I see..thanks. I wonder why this thread was rated so low...and a few others? Maybe someone knows something they're not telling us??

Nick