Contour Enthusiasts Group Archives Forums Modifications Forced Induction I'm LIVID ... the saga begins!!!

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http://cgi.ebay.com/ebaymotors/GARRETT-T3-Turbocharger-Wastegate-SWING-VALVE-assembly_W0QQcmdZViewItemQQcategoryZ33742QQitemZ8018468113QQrdZ1QQsspagenameZWDVW

I think an external is a better solution. If the internal didn't come with it you have to worry about it fitting correctly so the boost builds as quickly as possible and that it will be big enough that there won't be any creep.

Definitely designing for external. I'm thinking about optimal flow here ... how would I "block" that port so that the exhaust gas doesn't think about "rounding the corner" and then SMACK into a block off plate?

I would weld it shut (with the housing OFF the turbo!).

The flapper on my GT28R and now my newly aquired GT3071R have the flappers welded shut. Keyser can attest that it didn't stop the both of us from getting ~300whp from the GT28R with that setup.

Weld it shut and bin the actuator.

It's a completely flush hole about 3/4" in diameter, how would I weld it shut? Are you suggesting I get the external flapper assembly and block that shut or actually weld something into the hole AND block the assembly ... Sorry, just looking for some clarification.

Cut out a "coin" of steel and tap it into place then weld it.

Yeah just get some metal over the hole and weld it. A point of interest though is that in your photos of the hot side it doesn't appear that this turbo was balanced. Do you have a photo of the compressor wheel?

Actually Chris I don't think it's even a real Garrett. Garrett's have a "wankel rotor" shaped end on the shaft.

I'll post up an image of the impeller tonight when I get home.

As for cutting some plate to size and welding it in the opening, what really would be difference between that and a flange ... the plate might be what ... 1/8"-1/4" at most ... that's going to do nothing to smooth the internal flow through the housing.

Anyone know of any good online links to learning how to rebuild your own turbo? Rebuild kits are not that expensive and I'm capable, just don't know how and don't want to "learn on the job" with something like this.