Do I need 1g or 2g MAF-T?

[the_red_pooch]

Ok, I'm looking at buying a MAF-T with the GM 3" MAF included. I found a pretty good deal but it says the MAF-T is for a 1g DSM. What is the difference in the 2g MAF-T compared to the 1g and how do I know which one I need. I have a somewhat mixed motor setup and I'm unsure as to what I need. I have the 1g 6-bolt motor but I don't know if that matters or not? I'm assuming I still have a 2g ECU? How can I tell?

 

[donmagicjuan]

It matters in the translation of the GM MAF signal. The 1G and 2G stock MAS units are not calibrated the same. If you are switching from a 2G MAS, get the 2G MAF-T, and vice versa.

 

[the_red_pooch]

Any way to tell visually maybe? Also, if I did get the 2g setup and I have a 1g MAS right now how hard would it be to switch whatever is needed to put it back to a 2g MAS? I'm not so knowledgable with the ECU system yet . Thanks much so far tho!

 

[donmagicjuan]

The 2G MAS is more oval-shaped, and the 1G MAS is more circular. You can take a look in the engine photo gallery to get a better idea of the differences. If all else fails, post a pic of your sensor and I'll tell you. I'd say chances are you have a 2G MAS in your car, but here's the vfaq link for the swap, just in case.

http://www.vfaq.com/mods/2GMAF-1G.html

 

[the_red_pooch]

Thanks alot! You've been a huge help so far. I think I have the 2g, it looks like it to me anyways. How hard will it be for me to convert so I can vent to atmosphere? I'm buying the MAF-T brand new and a 3" GM MAF. Now is it as simple as I just install the MAF right before the TB in my UICP, un-hook the recirculation hose from my BOV and and plug in the MAF-T? Or is tuning required through the MAF-T?

 

[donmagicjuan]

No problem. You should just have to install the MAF in a blow-through configuration (after the BOV) and hook up the translator. I'm not very familiar with MAF-T tuning, but I believe you can dial in your injector size and the target AFR, depending on the version of the unit, and you're good to go.

 

[the_red_pooch]

Ok thanks again. It is supposed to be the version 2.01 or something, the newest it says. Also here is a pic of my engine bay, maybe you can confirm. Also I now should be able to replace my air filter and completely remove that MAS for a more free flowing setup right?

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[donmagicjuan]

Yes, that's a 2G MAS. You are correct that you will be able to remove the stock MAS entirely and fit a regular filter to an intake pipe without the return stub for the BOV. Have fun!