How is my porting?

[IslandTSI]

Pics are kinda crappy I know. And dont mine the sheen of rust on the o2 housing. I wiped it down a couple hours ago but I still have to smooth everything out and polish so its a non issue.

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[CanadianTSi]

Looks good. You can get a flap wheel and smooth it all out totally if you feel like it.

 

[1gcrazy]

Holy no lip on your 02 housing batman!

 

[IslandTSI]

Its gasket matched to a 2.5 inch exhaust gasket. Theres still plenty of material there though. And I was gonna pick up a flapwheel today, but all they had were 3" ones which are to big to use

 

[CanadianTSi]

If you have a Brafasco near you they should have some smaller ones.

 

[romeen]

Personally I have a few reservations about excessive pre-turbine porting that I won't get into right now. Having said that you're port job should be very effective at reducing boost creep.
One other thing you can consider for the final polish are cross buffs as seen here:
http://store.summitracing.com/egnse...1&Ntt=crossbuffs&searchinresults=false&N=+115

I'm not saying that they're necessary but they really do create a true mirror finish with much less time and labor than other methods. I use them on all my porting. Medium grade then finish with Very Fine. They are used with light oil (WD-40) at medium speed.
Just something to consider.

 

[ndsti]

www.eastwood.com sells a port and polish kit and the carbide bits for steel and aluminum.

The kit works great i used it on my evo III and now I have a mirror shine and very smooth steel. Looks almost professional and it only took about 1hr to do.

 

[Boosted98gsx]

Looks like you could open up the wastegate merge tube.

 

[arash15]

check out my thread. i was on the same boat as you a whle back. good luck. the 02 housing looks good, but you need to work on the other items. http://www.dsmtuners.com/forums/showthread.php?t=191447

 

[daren_p]

That must be an extra large 2.5" O2 gasket , I don't remember mine being that large & was gasket matched as well. Overall looks pretty good, a few sanding drums & then finishing it off with a flapper wheel will give you a nice smooth polished finish. Only area I would consider if you want to help prevent boost creep (if you think it will be an issue for your setup) is remove materal where the WG passage enters back into the exhaust flow on the O2 housing. If you take some of the wall back it allows a larger WG outlet passage.

 

[IslandTSI]

Well i got off my ass finally and did some more work. Some more porting and a bit of polishing. Heres the final result. The porting isn't mirror smooth but its all smooth as hell to the touch so its good enough for me.

Removed some more material around the wastegate merge area.

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Turbine housing inlet

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Turbine outlet

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And the manifold. I didn't bother to port the runners as I wasn't going into the head.

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Heres an idea of how much material was removed from the manifold and turbine inlet. The black gasket is the stock piece.

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[IslandTSI]

And I finally fixed my broken manifold stud which is the reason i pulled all the hot side in the first place. I re tapped all the holes, new studs and new gaskets everywhere on the hot side. If nothing fixing that broken stud will help with gas mileage and maybe let me make a little more power.

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[Apeximprt2nr]

Looks nice. Just get rid of that turbo-mani. stud.

 

[blcknspo0ln]

Looks good to me