O2 Housing Project

[Kevin 1G Drummer]

it does. By like 1-1.5"
Better put some header wrap on it, otherwise you'll be cooking an alternator every couple months.

[blageo23]

Im going to make a heatshield for the alternator and it will not be that close once I get the new pipe and make it better.

[FattyBoomBatty]

Instead of buying an expensive buscher oil filter housing, couldn't you just go get one off a mighty max in a junkyard?

[Archertsi]

Looks good so far, too bad you couldnt have gotten a tighter u-bend. Here is a couple pics of mine that I built. 3 inch all the way. I have a few tips listed below.


You dont need much room to clear the oil filter. One thing that I did was belt sand the side of the v-band flange that goes to the down pipe. I sanded it at a slight angle, then sanded the end of the pipe that met it at the same angle so they were slightley oval, this gave it more angle for a sharper bend immediatley off the turbo. But you do not want to "pie cut" the pipe to make sharper bends. This creates "steps" on the inside of the bend. When the exhaust goes over these "steps", it start to tumble or "roll" back over itself. This inturn creates turbulance and slows exhaust flow.

[blageo23]

Looks good! Thanks for the tips!
I ordered a new Piece that is 120 degrees and looks to have a better radius. That should be here on thursday!

[Pushit2.0]

...You dont need much room to clear the oil filter. One thing that I did was belt sand the side of the v-band flange that goes to the down pipe. I sanded it at a slight angle, then sanded the end of the pipe that met it at the same angle so they were slightley oval, this gave it more angle for a sharper bend immediatley off the turbo. But you do not want to "pie cut" the pipe to make sharper bends. This creates "steps" on the inside of the bend. When the exhaust goes over these "steps", it start to tumble or "roll" back over itself. This inturn creates turbulance and slows exhaust flow.

But sanding the flange and pipe makes it a pie cut. That is a little to much thought and insight for the average DSMer who just says "get'er done", as cheap and easy as possible of course. I would guess the slip connection makes a few people ask, will that leak?

~Jon

[Archertsi]

It shouldnt leak, its been done coutless times, the exhaust is flowing the other direction. Even if there is a small leak, I dont care, most people dump them to the ground and that is way louder. I'll never hear a small leak.

Yes I guess I would consider it a slight pie cut, but it's immediate. You hafto sacrafice somewhere. Look at an fp o2 housing, they pie cut it like crazy! And they dont even purge weld it. Also the v band flange that I used was from fp, it flares from 2.5 inch to 3 inch, so the angle that it made matches the angle of the curved pipe on the inside of the radius so there is no step. Ill try to snap a pic of that today so you can see what I mean, it's what really helped me make the difference between clearing and not clearing.

I did nothing in my build with a "git er done" thought of mind, that's what makes dsmers look bad in the import crowd.

[Archertsi]

Actually you can kinda see it here. Look at my first weld to the v-band flange.




Click on this pic and then click on the full size image, you can really see the inside of the bend.

Here is my first sad attempt at an 02 housing. I pie cut it, because I didnt know what I was doing. Tried to copy fp's 02 housing. There is one thing you could try that I did do with this. I angled it forward first, then turned it down. This gets it away from the alternator and oil filter.

[sleepydsm]

Is the purpose of the slip fit for the dump tube to aid in removal of the wastegate?

[Goat Blower]

I did nothing in my build with a "git er done" thought of mind, that's what makes dsmers look bad in the import crowd.

Amen. I look at some of the stuff out there and just shake my head. I suppose that's what happens when you can buy a DSM for $1500 these days.

BTW, I absolutely love your downpipe. It's almost exactly what I ended up with when I had 3" Hahn Racecraft dowpipe/02 housing and routed the external into the pipe, but yours is nicer. That Hahn was a nice piece, just needed something a little bigger. :spin: