Hows my port job?

[dsmzoom]

Alright well after getting horrible creeping problems, I ported it once and came to the conclusion that I needed some more, so this time I went to town. After re installing it, My creep issues was about 80% fixed, I'm looking for that extra 20% that I missed. I think that it lies in the o2 housing, but you be the judge.

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[cruisintalonawd]

its most likely the O2 housing not the sensor because you should be porting that too

 

[dsmzoom]

That was a typo, I meant the housing. Does the hole looking big enough in the o2 housing or is it still restrictive?

 

[dsmzoom]

I'd hate to bump this, but I really need some insight..

 

[Mr Peepers]

How bad is your creep? Desired boost/what it creeps to near redline/rpm it starts to creep.

Sometimes you can only go so far with porting, it really depends on how low of boost you want to run and your exhaust setup. Open 3" downpipe for example makes it a PITA.

That looks like a 2g o2 housing from the pics. 1g and 2g o2 housings have basically the same wastegate passage and the wall can be knocked down a bit and ported for a better transition back into the main exhaust path. Evo3 o2 housings have a much better WG passage and transition which may help with creep; the o2 housing isn't usually a major factor in boost creep though. That does look larger than the stock 2g WG passage transition in the pics, it's hard to tell.

 

[dsmzoom]

I want to run 12psi, possibly 14psi once I rewire my fuel pump. My dp is 2.5" from the inlet to the flex section, then opens up to 3". The wg passage transition has been ported a little bigger then stock. I am so close to solving this. My creep was horrible, completely uncontrollable, now it holds 10psi up to 5k then creeps up to 19psi.

 

[Mr Peepers]

I'd check to make sure the wastegate actuator arm doesn't have to be pulled more than 1/16" or so to get on the flapper lever. You could be loosing some travel by having it too tight on there to begin with. While it's off you might as well pressurize it with ~10 psi and see how far it opens. Normal is ~1/3 of the way, with the WGA arm moving ~3/8" total.

If there is extra material left, I would port some more directly above the wastegate passage since this is most likely the biggest help in any port job for creep. More exhaust gas will be caught by the bottom of the WG passage and sent through it.

 

[dsmzoom]

I have to pressurize the WG just to get it onto the flapper lever, You wouldn't happen to have on of those custom wg your notorious for laying around would you? As for the material above the wg passage, you can almost directly see the flapper itself from the inlet

 

[gsxeclipse97]

yeah i have a creeping issure to with my 14b and it holds 15psi until about 5500 rpms and then it starts to slowly creep up. It is also ported and i still have the factory down pipe on just with the apex cat back on. I may have to pull off my o2 housing to port it as well.