Pictures of Maf-T install

[Andrew Scott]

The original ugly beast! It's huge! And inefficient!


First, attach the new air filter to the inlet side of the gm-maf.
New one is much nicer looking!


and bigger too!


Next, attach the GM maf on the outlet side to your original intake. I'd suggest getting a 3" to 3.25" coupler from kinetic for this, as a straight 3" coupler is a BITCH to get on the MAF. It can be done though, as illustrated by the picture.


Mmmm purty electronics. Plug the GM side of the MAF-T into the GM MAF, and set the dip switches as illustrated in the manual. I only had to change the "Fuel Cut Defenser" switch to on, the rest were already set for 1gs. (NOTE: Fuel Cut Defenser DOES NOT WORK!). I'm also still using stock injectors (FOR NOW), and using an AFC so I didn't have to play with any of the dials.


Here it is installed.
The plug that goes into the original MAF plug isn't a perfect fit, and they suggest playing around with it a bit, but mine worked first time. I zip tied the connection together as suggested though.

Thats it, true plug and play! Now when I install my injectors, all I have to do is dial in the base setting in -5% increments (ie. 680s, which are 50% bigger than stock, you would dial to 10 for -50% airflow), and fine tune with the AFC.

With the GM maf, I notice WAY faster turbo spool, and after I remove the honeycomb in the GM maf (only used for filtering big particles I think), it should be even faster. I hit full spool (17 pounds) on my 14b at like 3000 rpm or somthing rediculious. I also hit fuel cut in first gear at about that time My blowoff valve sounds like its venting now too. All in all, VERY pleased with this upgrade.

[Mike Schmid]

Who's MAF-T is that and how much if ya don't mind.  

And can that setup also be mounted blow through, in the UICP for instance.  I've seen em like that, just curious about that translator.

[Andrew Scott]

Who's MAF-T is that and how much if ya don't mind.  

And can that setup also be mounted blow through, in the UICP for instance.  I've seen em like that, just curious about that translator.

It's a ramchargers MAF-T, and I know about the blow through, but Ryan Lore has enlightened me of some problems I may experience, and descided to put off going to a blow through setup until I can afford some time and parts (ie. HKS SSQ)

[Andrew Scott]

oh yeah, $320 CDN including shipping and taxes and all that stuff for the translator... the mafs can be found on ebay for a variety of prices

[Mike Schmid]

So what are the potential problems with a blow thru setup?

[Andrew Scott]

So what are the potential problems with a blow thru setup?

Hopefully Ryan won't mind me quoting him:

A few words of advice.... BLOW through BLOWS...
THe MAF takes up more room than you think. I'd be willing to bet that even if you could find a 2.25-3.00 coupler that the sensor wouldn't fit because the 2g elbow doesn't locate far enough to the front and you will end up with a humongo sensor crammed between your battery and cam angle sensor.
 
Any hose transition that I can sell you is going to be 3" long.
Add 2 hoses (6") to the middle part of the sensor width (2.5") so you now have something 8.5-9.0" long, and at it's fattest part 5" in diameter, that you are trying to locate in line with your old upper pie and elbow and you really start running out of room.
 
 If I still haven't scared you off here's the way I did it because "I can"
 
Reworked (probably would have been faster to remake) the upper I/C pipe to incorporate stainless transitions. Basically I got to cones (70.00Ea) that transtion from 2-3" over 4" of length. (I have 2.5" piping so keep this in mind) I then cut each cone in half and welded up transitions onto my throttle body elbow and upper pipe then added a 2" piece of 3" dia pipe so that I could clamp on straight 3" hoses ( we now have 3-3.25" hose which would fit everything beautifully) This of course added an extra foot or so of total length to my upper pipe which meant changing out some of the turns for sharper radiuses due to the fact everything ended up being pushed forward. That in turn screwed up my intake pipe which I also had to redo
 
With it all said and done!!!!!!!
 
Looks great!!!!
Cost a fortune....
 
Works marginally..........  Huh?
I'll say it again: Blow through BLOWS!
 
If you read dsmtuners much there's a few people that have been having issues with vented BOV's on non MAFT cars. The same issues that they have, I have and it drives me nuts!
Basically at part throttle slight load situations the BOV tends to flutter a  bit that flutter has the same effect as opening and closing the throttle rapidly and you get a mild jerking effect.
I also notice that rapid part throttle to WOT  the BOV causes similar issues but now that you're WOT the fuel is there and the air ain't so it burps and backfires more than other times.
IF you tighten the BOV enough so that this doesn't happen you get compressor surge....
 
The Solution: run a recirc hose back to the intake pipe and see if that fixes it..
Haven't done it yet....But I have a feeling that the engineers at Mits knew what they were doing when they recirced the BOV
 

[Mike Schmid]

Oh, okay, so it's mostly a sensor fitment problem.  As for the driveability... that kinda sucks... I wouldn't think a vented BOV would be a problem with the MAF upstream of the BOV.  

I know Jack Lee runs one, maybe he can throw in some input n the driveability issue.  Jamie too.

[Ryan Lore]

Actually fitment is not a major issue.

Those comments were purely directed at Andrew who worked very hard to build something and then was having to cut it up. ( I was trying to discourage him)

Yes, the MAF is upstream of the BOV so the mixture is correct, however drivability issues that I'm complaining about involve the fact that the BOV  UNCONTROLLABLY varies the amount of AIR getting into the motor and does give undesirable jerkiness feeling exactly the same way as somebody rapidly going open/closed/open/closed on the throttle.

That said I'm fairly picky about my car and I'm sure that you could get used to what it does and just change your driving style. I don't plan on changing the way I drive (It's auto for crying out loud!) so I will do something else to the car.  I do also suspect that the fact it's auto may amplify the drivability issue. Afterall, there aren't many A/T's running this setup.

[Andrew Scott]

Actually fitment is not a major issue.

Those comments were purely directed at Andrew who worked very hard to build something and then was having to cut it up. ( I was trying to discourage him)

Well it worked....

Plus Jovan did the actual welding so who cares  :laugh:

I may give it a try once I am able to purchase a BOV that it designed to be vented.