What Is This? And Advice on How to Add GM/MAF - Pics!

[mikeyVR4]

Hello,

Please help so I can get some work done

I just wired/soldered/butt-clamped/soldered again my SAFC II and MAFT 2.02. Now it is time to hack the throttle body pipe and add in the GM/MAF.

I have two questions.

1.) What is this threaded screw insert? I do have the wire/screw for it but not sure what it is for. Also, can I re-arrange that screw to be BEFORE the GM/MAF? Curious to know if that will affect any readings. I can keep it AFTER the GM/MAF but it would be easier to have it before.



2.) Where should I cut my ETS Throttle Body IC pipe to add the GM/MAF? I know its recommended to have at least 6" of straight pipe for the air to stabilize itself before entering the throttle body.

One more Q. Can I weld an aluminum BOV flange to a stainless steel TB pipe? I know to add the flange BEFORE the GM/MAF.


Thanks!!!

Mike

[Hard AttacK]

Are you going blow thru? That bung might be for meth or iat sensor?

[TurboSinceBirth]

Originally Posted by Hard AttacK

Are you going blow thru? That bung might be for meth or iat sensor?

This.

I also think that you probably won't want to run the GM MAF sensor there. It's definitely important to have straight air before it 6-8". I was only able to accomplish this placing it below after the bend out of the FMIC core on the cold side right before it turned to come up. I had a different FMIC setup so I don't know how much straight pipe is in that area. For lower power levels you can probably get away with it in that original spot you were talking about but it's definitely not idea. You will notice some erratic/weird airflow readings if you dig into it in more depth. It may not be hard enough to tune around until higher boost. I'm not sure. IMO that original spot would be my last choice.

[mikeyVR4]

Thanks guys!

Yes I am going to be running blow through and I am glad I asked. I had it backwards thinking the 6inch straight needs to be AFTER the gm/Maf. So you guys are saying I need it BEFORE the gmmaf? The Bov does need to be before the Maf right?

[mikeyVR4]

I will take some more pictures but now I am thinking I can add the GM/MAF lower at the end of that pipe (behind the radiator). It's very straight (up and down) where the coupler is at. I can just cut a few inches off that end and add it there. As for the BOV...where should I Add that?

[Keyan]

it fits but you gotta cut the pipe and couplers, and cram it in there.

the bung is for the wastegates. the ets kit comes with a threaded vac adapter.

[mikeyVR4]

Originally Posted by Keyan

it fits but you gotta cut the pipe and couplers, and cram it in there.

the bung is for the wastegates. the ets kit comes with a threaded vac adapter.

Hey Keyan,

Thanks! So you have that vac adapter before the gmmaf? Can you post a picture from a side view?!

[mikeyVR4]

Keyan ? Lol where did you go

[TurboSinceBirth]

It looks like you have a different GM MAF than Keyan. His would work and I've seen them installed like that. Yours is a little longer and the sensor part looks wider. You would probably be better off installing it in that straight section after the outlet of the FMIC.

If you run the BOV before the GM MAF it will let out air the MAF won't meter and thus the car won't run rich between shifts, hang rich when you go out of gear then slowly go back to stoich after a second or two, and the car will run more like stock. With the BOV after the MAF or in other words between the MAF and throttle body it will be the same as running open atmosphere with the conditions described above. You can run open atmosphere with the BOV before the GM MAF.

[mikeyVR4]

Originally Posted by TurboSinceBirth

It looks like you have a different GM MAF than Keyan. His would work and I've seen them installed like that. Yours is a little longer and the sensor part looks wider. You would probably be better off installing it in that straight section after the outlet of the FMIC.

If you run the BOV before the GM MAF it will let out air the MAF won't meter and thus the car won't run rich between shifts, hang rich when you go out of gear then slowly go back to stoich after a second or two, and the car will run more like stock. With the BOV after the MAF or in other words between the MAF and throttle body it will be the same as running open atmosphere with the conditions described above. You can run open atmosphere with the BOV before the GM MAF.

Ok thanks. Just so we are clear I will install the GM/MAF on a straighter pipe (6" before the GM/MAF), I will then install the BOV flange BEFORE the GM/MAF

Throttle Body > GM/MAF > Atleast 6" of straight pipe (to smoothing air), BOV > FMIC Core.

Yeah not sure why my GM/MAF is different. I purchased that and the MAFT 2.02 brand new from Pampena. The GM is 3" to match my IC pipe.