MAF Translater- Blow Through or Pull Through

[crvttc5r]

i'm getting a gm maf translator and wanted to know is it better to make it a blow through after the intercooler or a pull through which means leave it in the stock location? Any help would be swet thanks.

-matt

 

[Tallen]

depends on whether you want to vent to the atm or not. theres not much of a diff, if any.

 

[LightningGSX]

I think it would be more accurate at lower pressures

 

[kpt4321]

Blow-through allows you to vent to atmosphere (good aftermarket BOV's like the Tial do not have provisions for routing back to the intake) and also allows you to push a greater mass of air through the smaller 3 inch MAF.

Also, it will allow you to run, even if you blow off a pre-MAF IC pipe.

....Kyle T.
93 TSi AWD "TURBO4"

 

[crvttc5r]

not to sound like a laymen, but whats a pre-maf IC pipe?

-matt

 

[Tallen]

Originally posted by LightningGSX
I think it would be more accurate at lower pressures

you thought wrong


if you blow an IC pipe off, your car will still run ok and let you limp home (i know this)...thats what he means.

 

[LightningGSX]

Originally posted by Tallen

you thought wrong


if you blow an IC pipe off, your car will still run ok and let you limp home (i know this)...thats what he means.

How does that make me wrong?Whats so good about venting to the atmosphere?

 

[DSM mechanix]

Originally posted by crvttc5r
not to sound like a laymen, but whats a pre-maf IC pipe?

-matt

When using the MAF blow-through style, a pre-MAF IC pipe would be an IC pipe that is before the MAF.

Anything from the turbo to IC or IC to MAF can be takin off and the car will still run because the air is still being metered.


LightningGSX,

like kpt4321 said, the benefit from venting is that you can use any BOV you choose, including some of the better quality units like the Tial, that dont allow the use of a recirculation kit.

 

[LightningGSX]

But my comment was about accuracy of the MAF,not about BO valves.My first comment that is.

 

[DrZiplok]

There is no accuracy difference.

Blow-through is great if you feel like spending more money on custom intercooler piping. Draw-through works just fine, and it's a cheaper and simpler approach if you're cheap like most DSM owners. 8)

 

[crvttc5r]

well i have to build custom intercooler piping anyway so i'll make it a blow through.

-matt

 

[kandt]

blow through also allows you to use an cold air intake which helps spool up time.

 

[Bd1000Eclipse]

Originally posted by kandt
blow through also allows you to use an cold air intake which helps spool up time.

a cold air intake effects spool up time?

no...

 

[Defiant]

Originally posted by LightningGSX
Whats so good about venting to the atmosphere?

It makes noise that are angrily snug, you.

 

[gsxstac]

puttin it after the maf is def better. turbos arent meant to suck, they are meant to blow (no jokes) runnin a ram air into the turbo or even just puttin a filter on it and taking the filter off at the track will def reduce spool up and lag. and its also easier to tune when u have the maf after the bov. i'm eventally gonna run some sort of ram air into the turbo with a filter so when moving is just forces air into ir. that way my turbo wont work as hard and it will def spool up way quicker. instead of pulling air and then pushing it, it will be having air pushed into it. but for now i'll just put a filter on the turbo itself

 

[talontsi01]

I just got my MAFT. I'm still deciding which setup I should go with. I know that if you do the blow-through setup, your blow off valve swoosh noise will be louder, but if I do the draw through setup, will my blow off valve sound be louder than it is without the MAFT? Also, are spool up times quicker on either one of the setups?

 

[Bd1000Eclipse]

Originally posted by talontsi01
I just got my MAFT. I'm still deciding which setup I should go with. I know that if you do the blow-through setup, your blow off valve swoosh noise will be louder, but if I do the draw through setup, will my blow off valve sound be louder than it is without the MAFT? Also, are spool up times quicker on either one of the setups?

the bov sound with the maf might be a tad bit louder, but not like it is when its in blow through.. everything is louder in blow through.. people say that it does change spool up time, but im not sure how since spool up time and lag is decided by the size of the turbo and the exhaust.

 

[Tevenor]

Originally posted by Bd1000Eclipse


the bov sound with the maf might be a tad bit louder, but not like it is when its in blow through.. everything is louder in blow through.. people say that it does change spool up time, but im not sure how since spool up time and lag is decided by the size of the turbo and the exhaust.

And if I put a block of wood in my intake tract BEFORE the turbo, that shouldn't affect spool time either right? Air restriction pre turbo, length of piping post turbo and various other things all add or subtract from spool time. Yes the turbo characteristics are base setup but there are lots of small things that add up. Pre turbo restriction is one of them.

 

[DCJ98GST]

Has anybody had any problems with the MAF getting oily from running the blow through yet? If it is not a self cleaning MAF you may eventually have problems.

 

[Tallen]

I'm still good after some 5 months of owning it (bought it 2 weeks after release). I was doing the 1G TB mod, and I checked the MAF while I was at it. It's completely oil free! I do not have my breather recirc'd either.

As long as the metal piece in the middle isn't removed, I forsee no trouble.

 

[Car Cannibal]

I would go blow through mainly due to the elimination of leak problems.

Problem is, where do you get a 3.5 to 2.5 reducer for the bigger mafs?

 

[Bd1000Eclipse]

Originally posted by Car Cannibal
I would go blow through mainly due to the elimination of leak problems.

Problem is, where do you get a 3.5 to 2.5 reducer for the bigger mafs?

from RRE or from ramchargers