Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: mmmm billet

+ Reply To Thread
Posts: 31-40 of 66
2010-05-19 21:23:02
#31
Originally Posted by Cliff
You need to read the post right above yours. All AFM's are designed with draw thru configuration in mind, not blow-thru. OF COURSE it's glued together. Throw 15psi at it and I GUARANTEE you're going to pop the top, Just like I did.


I want to give up on them, but ignorance pisses me off.

That square is ~ 2x2" so with just 15psi you are putting 60lbs of force across the surface. If you want I can start calculating point loads between screws for the amount of deflection. (If you want to claim it won't 'pop off' I'd calculate for at least 40psi minimum for margin of safety which would be 160 lbs, I don't see those 4 screws doing that without burping the lid)

The stock maf has complete perimeter attachment around it with friction from tongue in groove and perimeter sealant. Failure is due to thin lid and poor attachment method tensile strength.
2010-05-19 21:35:01
#32
The pressure is not going to be on the screws. It is going to the hole where the sensor goes into see air. How do you think the circuit board stays in place on the oe when people go blow through. The only thing that pops is the oe lid. turbotank's doesn't have the little hole the OE has so the lid to the circuit box SEES NO PRESSURE.

Even if it did all you would need is a smear of rtv big deal.
2010-05-19 22:20:41
#33
Originally Posted by jere
The pressure is not going to be on the screws. It is going to the hole where the sensor goes into see air. How do you think the circuit board stays in place on the oe when people go blow through. The only thing that pops is the oe lid. turbotank's doesn't have the little hole the OE has so the lid to the circuit box SEES NO PRESSURE.

Even if it did all you would need is a smear of rtv big deal.


I see a giant hole where the sensor sticks through. And picture of fitment with said sensor shows gap around it. So WTF are you talking about?

Speaking as somebody who went blow through years ago for years... I know a little about it.
2010-05-19 23:32:49
#34


I took a pic of one I had in the garage. There are two holes on the OE piece. There is the big one and then a smaller one for cooling of the board. The small hole is the reason the lids blow the bubble gum lids on the stock MAF. I could be wrong but my guess is the billet pieces aren't going to have that small hole

The sensor that sticks through the hole has an o-ring and red rubbery stuff that keeps it in place an leak free in the black housing. That along with the four screws that hold the board to the housing.
2010-05-19 23:47:34
#35
Originally Posted by jere
I took a pic of one I had in the garage. There are two holes on the OE piece. There is the big one and then a smaller one for cooling of the board. The small hole is the reason the lids blow the bubble gum lids on the stock MAF. I could be wrong but my guess is the billet pieces aren't going to have that small hole

The sensor that sticks through the hole has an o-ring and red rubbery stuff that keeps it in place an leak free in the black housing. That along with the four screws that hold the board to the housing.


Dude I understand that... that small hole is there for a reason. It looks like he has the air going around the sensor.

You don't want to seal it off. I repeat you do NOT want to seal it off all the way. I am not going to hold your guys' hands on this, that hole is there for a reason.
2010-05-19 23:47:34
#36
wow this got out of hand real quick. yes jere you are correct. there isnt a bleeder hole in the new housings. the only way for boost to reach the chamber is to breach the oring. in the case that happens the oring would need to be replaced with a better one or i need to hold a closer tolerance on my id. i will weld one to a pipe and pressure test it with a boost gauge to make sure. im not opposed to changing the design at all to make it better or the best, thats why i posted it here for feedback from you guys. thanks for the input so far soon well have something well all be happy with
2010-05-19 23:48:57
#37
keep in mind i made maf housings about 4 years ago(that were ****ty in comparison) that worked very well also.
2010-05-19 23:50:40
#38
Sweet that should sell really good. It's kinda like the adapter I use for my lightning maf.

makes life so much easier for the blow through world.
2010-05-19 23:50:59
#39
Originally Posted by wnwright
Dude I understand that... that small hole is there for a reason. It looks like he has the air going around the sensor.

You don't want to seal it off. I repeat you do NOT want to seal it off all the way. I am not going to hold your guys' hands on this, that hole is there for a reason.


lol
2010-05-20 00:16:53
#40
I've run 26psi through my Z32 maf. It never blew up.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top