how difficult is it to "port the wastegate"?
Joined: May 2006
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From: Dodging bullets in L.A. Calif
Originally Posted by S2Kart,Apr 29 2008, 10:41 AM
....... You can even buy larger 304SS flappers online if needed. ....
I was looking at the WG opening and there is a good 1 - 2mm that can be milled/ground off and still have 2-3mm of flapper overlap for sealing.
However it would be better to get a larger flapper.
One other issue that may result from porting is that there will be a larger area for the exhaust gases to apply apply pressure on the WG flapper. If the WG actuator is too weak, then the flapper may open prematurely (premature flapping - sounds like a medical impotence condition lol ) If that is the case, then a stiffer spring actuator would be needed or use the ghetto fix "helper spring". I'm hoping the WG actuator is strong enough.
Where exactly did you see the SS304 flappers online? I googled for flappers a couple of days ago and had no luck finding any.
It'll be interesting to see if anyone who ports these turbos is able to avoid the boost creep issue. I'm still a good month or so away from porting / installing / and tuning. Too damn busy working on the Subaru GT35R setup, the S KW suspension, alarm, stereo..... grrr....
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Joined: Nov 2006
Posts: 748
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From: PDX west
Originally Posted by EngineerX,May 1 2008, 09:26 AM
I plan on doing the WG porting at my friend's shop. He has a mill and a die grinder. I split the turbo apart, removed the trubine housing which is easy to do by loosening the clamp.
I was looking at the WG opening and there is a good 1 - 2mm that can be milled/ground off and still have 2-3mm of flapper overlap for sealing.
However it would be better to get a larger flapper.
One other issue that may result from porting is that there will be a larger area for the exhaust gases to apply apply pressure on the WG flapper. If the WG actuator is too weak, then the flapper may open prematurely (premature flapping - sounds like a medical impotence condition lol ) If that is the case, then a stiffer spring actuator would be needed or use the ghetto fix "helper spring". I'm hoping the WG actuator is strong enough.
Where exactly did you see the SS304 flappers online? I googled for flappers a couple of days ago and had no luck finding any.
It'll be interesting to see if anyone who ports these turbos is able to avoid the boost creep issue. I'm still a good month or so away from porting / installing / and tuning. Too damn busy working on the Subaru GT35R setup, the S KW suspension, alarm, stereo..... grrr....
I was looking at the WG opening and there is a good 1 - 2mm that can be milled/ground off and still have 2-3mm of flapper overlap for sealing.
However it would be better to get a larger flapper.
One other issue that may result from porting is that there will be a larger area for the exhaust gases to apply apply pressure on the WG flapper. If the WG actuator is too weak, then the flapper may open prematurely (premature flapping - sounds like a medical impotence condition lol ) If that is the case, then a stiffer spring actuator would be needed or use the ghetto fix "helper spring". I'm hoping the WG actuator is strong enough.
Where exactly did you see the SS304 flappers online? I googled for flappers a couple of days ago and had no luck finding any.
It'll be interesting to see if anyone who ports these turbos is able to avoid the boost creep issue. I'm still a good month or so away from porting / installing / and tuning. Too damn busy working on the Subaru GT35R setup, the S KW suspension, alarm, stereo..... grrr....
has 34mm flapper for TD05,
atpturbo.com should have them also
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From: Phillips Ranch 909!
Originally Posted by JoeyBalls,Jul 20 2008, 06:43 PM
thinking about doing this again, seems to be in the process with some other member, what do you guys think?, has anyone done it yet on the Greddy kit?
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Joined: Jun 2004
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From: Phillips Ranch 909!
Originally Posted by brilliant,Jul 20 2008, 11:49 PM
yayy you guys can do my hw for me 
.
keep us all posted, esp me. because i am very interested in the results!
we should have a greddy turbo s2k meet for us socal guys.
. keep us all posted, esp me. because i am very interested in the results!
we should have a greddy turbo s2k meet for us socal guys.
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Joined: Apr 2007
Posts: 512
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From: Huntington Beach, CA
Originally Posted by JoeyBalls,Jul 21 2008, 09:15 AM
I cant wait for the fall, finally take my car to the track. It will be my 1st time ever so I am sure I will run 14+, but they tell me MPH is a better indication of what the car can do