Custom O2 Housing - Mazda MX-6 Forum
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post #1 of 341 (permalink) Old 6-22-12, 19:26 Thread Starter
 
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Custom O2 Housing

I have a friend making me a custom O2 housing for my '89 GT and it's actually coming along nicely.

The custom O2 housing looks very similar to the ones made in the past with a divorced wastegate pipe. This will bolt up in the OEM location and enable me to keep my A/C if I still had it and will be 2.5" vs the stock 1 7/8".

Here are the bends being used:


Here is the jig made off the OEM O2 housing:





Here is the start of the new custom O2 housing:


All it should need now is some clean up and an O2 bung. The wastegate tube isn't as graduated as I anticipated, but I think it looks really good.








What do you guys think?
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post #2 of 341 (permalink) Old 6-22-12, 21:19
 
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I think it looks great

1990 mx6lx 13.5@102.9 on 87shot
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post #3 of 341 (permalink) Old 6-22-12, 21:55 Thread Starter
 
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I'm pretty excited to get it installed and feel the difference. I'm getting a 2.5" downpipe too, so I'll have 2.5" turboback.

Do you think others would want one too? He's considering making more if there is a demand for them.

Last edited by mjspiess; 7-12-12 at 16:07.
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post #4 of 341 (permalink) Old 6-22-12, 22:15

 
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Looks good. I like that you made up a jig for it.

Teh Telstar can NEVAH lose!
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post #5 of 341 (permalink) Old 6-22-12, 22:49
 
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Looks good.

Don't forget to add a divider to sit inside the exhaust housing and separate the gasses into the 2 pipes.

VF12 - VJ11 hybrid http://www.mx6.com/forums/1g-mx6-for...ic-inside.html 5 1/4" VDO splits in custom door trims http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 12" sub in custom boot/trunk http://www.mx6.com/forums/1g-mx6-app...cs-inside.html 2.5" cat back, 18"x12"x3" FMIC.
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post #6 of 341 (permalink) Old 6-22-12, 23:01 Thread Starter
 
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Yes, thanks for the tip. I let my friend know to add that.
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post #7 of 341 (permalink) Old 6-22-12, 23:06
 
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He'll need a turbine housing and gasket on hand to get it right.

It doesn't need to be airtight just snug inside the turbine housing.

VF12 - VJ11 hybrid http://www.mx6.com/forums/1g-mx6-for...ic-inside.html 5 1/4" VDO splits in custom door trims http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 12" sub in custom boot/trunk http://www.mx6.com/forums/1g-mx6-app...cs-inside.html 2.5" cat back, 18"x12"x3" FMIC.
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post #8 of 341 (permalink) Old 6-22-12, 23:58 Thread Starter
 
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What sucks is I used to have a turbine, but scrapped it... If I get measurements, do you think he could fabricate the divider that way? How important is the indention/flat edge around the wastegate port on the flange? Like this one pictured. I assume it's for the the wastegate to fully open. With the larger hole of my setup, do you think it'd be fine without the indention?
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post #9 of 341 (permalink) Old 6-23-12, 0:31
 
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If you get him measurements he should be OK.
He can make it a little bigger than the measurements indicate and then you can adjust the divider to suit upon assembly.
BTW, It really only needs a couple of decent tack welds to attach it to the flange, allowing you plenty of room to adjust it to fit.

The milled area next to the Waste-Gate port is to allow the wastegate flapper to open fully.
Depending on the size of the WG port on the flange you have there it might not be neccessary.
You'll have to check the WG range of movement upon assembly and possibly grind with a burr if required.

VF12 - VJ11 hybrid http://www.mx6.com/forums/1g-mx6-for...ic-inside.html 5 1/4" VDO splits in custom door trims http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 12" sub in custom boot/trunk http://www.mx6.com/forums/1g-mx6-app...cs-inside.html 2.5" cat back, 18"x12"x3" FMIC.
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post #10 of 341 (permalink) Old 6-27-12, 23:56
 
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OH MY GOD.

Please make more, and put them up for sale.

If the price is below $200, or even well below...I'm hella down.

89' 626 GT ATX to MTX
Fast stuff: P-ECU/T-Bird Hybrid/Dual valve springs/Fidanza FW/Maas O2 housing/Mjspiess 2.5 Downpipe/side exit/Walbro 190/Bosh DRI injectors/NGK plugs/wires/MSD B2 coil/ATX TB
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post #11 of 341 (permalink) Old 6-30-12, 14:04

 
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Quote:
Originally Posted by mjspiess View Post
What do you guys think?
Quote:
Originally Posted by mjspiess View Post
Do you think others would want one too? He's considering make more if there is a demand for them.


I have access to make my own(and have), but I wouldnt have an issue in buying a piece to support a new venture like this to help get it off the ground.

Gavin
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post #12 of 341 (permalink) Old 6-30-12, 20:23
 
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I would be up for one as well, go for it and make up a bulk buy.

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Last edited by gbilski; 7-1-12 at 1:21.
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post #13 of 341 (permalink) Old 6-30-12, 20:51
 
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I seriously can't stop looking at these pics. I have an mx6 that needs one, and a 626gt that could use one lol.

I've shown this to my PGT friend and he is down too.

This is some serious stuff if it actually gets off the ground. (not holding my breath though...)

89' 626 GT ATX to MTX
Fast stuff: P-ECU/T-Bird Hybrid/Dual valve springs/Fidanza FW/Maas O2 housing/Mjspiess 2.5 Downpipe/side exit/Walbro 190/Bosh DRI injectors/NGK plugs/wires/MSD B2 coil/ATX TB
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post #14 of 341 (permalink) Old 7-1-12, 3:11

 
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post #15 of 341 (permalink) Old 7-9-12, 13:30 Thread Starter
 
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I was able to pull a turbine housing and sent it off to my friend. The wastegate actuator moves the flapper roughly 1/2" and once fully open, does break the surface where the flange would meet the turbine housing. So he'll know for sure now if the area next to the waste gate port needs milled or not and will be able to get the divider just right.

Once he makes mine, sends it to me & I get it installed to see if there are any bugs to work out, he intends to make more if there is a demand for them. He thinks he'll be able to sell them for ~$150.

Gavin, I sent my friend several links with examples of what I wanted and he basically combined your waste gate pipe design to Jake's final design and that is what he came up with. It looks great! Thanks for the link to that other thread. I had not come across that one yet. Lots of great info!

I'll keep you guys posted!
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