You have two other downsides with this setup: IAT and BARO. Those two sensors are integrated into the MAS. You put it in blow-thru, now you have that sensor in an environment that alternates between pressure and vacum. This will throw your BARO reading off every time the throttle moves. If this is in a 2G car that uses OBD2, I wouldn't be surprised if the ECU thinks something isn't right and throws a CEL.

Depending on the quality of the intercooler you're using, once it heat shoaks, you've thrown your IAT reading off. This makes for an even more inconsistent tune than if you have the MAFT setup since the translator locks the IAT and BARO readings.

If they're doing this for all show and no go, that's fine, but you're not going to see a performance benefit from trying to use the 2G mas in a blow-thru setup.

Hey Quasi, just out of curiosity what about this setup on a 1g? With the 2g mas of course.

Thanks for the FACT on this. It makes a lot of sense for people to go to he MAFT setup rather than trying this approach, because of the other sensors incorporated into the MAS, also, You say the MAFT Locks the IAT and BAR readings??? As in it keeps it at a constant level, and does not change through changes in temperature??? If so, do you know what Temp it locks it at??? thanks! I do understand that the Stock MAS is Karman vortex, and obviously is a different type of reading.


thank you.

Mark Padilla

adiffrentcity said:

Hey Quasi, just out of curiosity what about this setup on a 1g? With the 2g mas of course.

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You need a maf-t setup to do blowthrough. It won't be right on a 1g either. I thought that the 1g and 2g are karman vortex type sensors and wouldn't work like this.

Yea I was looking for something else after making this post and saw the answer is no.

I do wonder If you could make a simulator for the BARO like they do for oxy sensors?

MarkAngelo05 said:

Thanks for the oppinion on this. It makes a lot of sense for people to go to he MAFT setup rather than trying this approach, because of the other sensors incorporated into the MAS, also, You say the MAFT Locks the IAT and BAR readings??? As in it keeps it at a constant level, and does not change through changes in temperature??? If so, do you know what Temp it locks it at??? thanks!

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What mondo said are not opinions, they're facts. Furthermore, it will not read correctly as wv have pointed out, do a search on "karman vortex".

Interesting idea, never thought of this. If you have DSMlink, you can lock the IAT/Baro readings. This might just work then.

eclipsegsx1736 said:

Interesting idea, never thought of this. If you have DSMlink, you can lock the IAT/Baro readings. This might just work then.

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Did you not read the link above? Karman vortex type air metering systems will not read correctly under pressure, everything else aside.

People stop being cheap and trying to find ways around this. Pick up a gm maf or go stand alone. I got a gm maf and the difference in flow was a huge difference.

wvturbo2 said:

People stop being cheap and trying to find ways around this. Pick up a gm maf or go stand alone. I got a gm maf and the difference in flow was a huge difference.

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, I was just asking if anybody else has tried it. I had my doubts and thoughts about it, and got some people to back it up too.

So, lets say I dynoed around 300HP with the stock MAS, and then I swapped it out for a MAFT GM MAF blow through setup, I should see some horsepower difference? same setup and everything else, just using the MAFT and GM MAF instead of the stock MAS...??

Thanks,

Mark

At 300WHP, no, I doubt you will see a noticeable HP gain from switching at that point. The 2G MAS would be fine upward of 400WHP with no problem. The advantage is that you will get a little better throttle response/spool, a bit more accurate of a tune, and you can vent your BOV.

you can vent your bov, tuning wont be pie. you need to calibrate the sensor, and thats not a walk in tha park. its easier to tune your setup through the stock mass and not make things complicated with another figure to tune for (MAF sensor calibration).

arash15 said:

you can vent your bov, tuning wont be pie. you need to calibrate the sensor, and thats not a walk in tha park. its easier to tune your setup through the stock mass and not make things complicated with another figure to tune for (MAF sensor calibration).

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I hope you're not suggesting venting with stock MAFs.

arash15 said:

you can vent your bov, tuning wont be pie. you need to calibrate the sensor, and thats not a walk in tha park. its easier to tune your setup through the stock mass and not make things complicated with another figure to tune for (MAF sensor calibration).

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oldman said:

I hope you're not suggesting venting with stock MAFs.

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I'm going to "assume" he meant with a GM MAF and MAF-T setup as his description is accurate for that configuration. While I agree that tuning is a little more involved than with the 2G MAS, the tune will be more accurate as far as airflow goes once you're done.