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Thread: Avenir Manifold w/ GT28RS

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Posts: 1-10 of 65
2009-09-09 20:27:38
Avenir Manifold w/ GT28RS
I just got my GT28RS in the mail today, bolted it up to the J pipe and manifold, and went to put it on the motor. The wastegate is hitting against the side of the block so I can't get a snug fit for the manifold. I shaved off a little bit into the block but I dont want to go too far. Anyone else have any ideas? I have about a 1/2" spacing until the manifold is snug.

I don't want to resort to getting a new manifold because that means I will have to get a new downpipe or something.... I would prefer to have everything line up the way it is right now, I just need to get it to fit a little better.
2009-09-09 20:31:38
Taken from Andreas Miko

Its very easy to make a small modification that stops the turbo from fitting the block. I have been doing this for about 10 years now.

All you have to do is shave the T25 flange side on the GTIR manifod by 3/8 inch. By doing this youy lift the turbo up and also away from the block. Not even the 3 inch inlet will touch.
2009-09-09 20:53:18
wow never knew that, so the actually t2 flange you shave down?
2009-09-09 20:59:33
yes that what it seems like
2009-09-09 21:00:40
How much do you shave it down though? And do you shave it down straight or at an angle?
2009-09-09 21:03:17
3/8 of an inch and if you do it on an angle I dont think it will seal correctly on the mani
2009-09-09 21:06:48
Plus that makes the downpipe and intercooler piping fit awkwardly. I still want everything to fit right, but I cant think of any ideas. I was thinking about cutting the bracket that the wastegate is on and moving it a little closer to the turbo. The wastegate I have on it is about 1/2" from the side of the turbo. If I did that, that would give me a little more rim.
2009-09-09 21:10:05
it will give everything more clearance actually. raise the turbo off the crossmember a bit more intake room dp will just go up a bit higher but i doubt it will have any clearance problems.
2009-09-09 21:13:05
downpipe can be adjusted, intercooler piping can be adjusted why hack the wastegate and all that when you can do it the correct way
2009-09-09 23:02:12
do you have the right wastegate and bracket for a fwd setup. most gt28rs come with the wrong waste gate and bracket. with the correct bracket very little modification is needed for the compressor housing to clear the block. I only had to remove 1/8" from the bellhousing for the turbo to clear.
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