Need Advice: GT25R Wastegate & Bracket - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-05-2007, 11:41 AM   #1
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Default Need Advice: GT25R Wastegate & Bracket

I just got a friend of mine to source a GT2554r from a MSP. I'll get some pictures up as soon as the dorm internet decides to start working. I do NOT have a wastegate or the wastegate bracket for it which presents a slight problem. I'd like to be running ~12 psi once I get it tuned...and there seem to be a couple of different wastegates for sale at ATP turbo, as well as a really expensive bracket. $50 for the bracket...

Should I try to source a used MSP wastegate (set at 6.5 psi) or buy a new wastegate and then try to find a used bracket from an MSP? From pictures they appear to be the same, the wastegate bracket attaches to the rear of the compressor housing rather than the front like my T25 that I sold did.

EDIT: Getting a new wastegate...what psi spring should I run?

Last edited by miatamania; 02-05-2007 at 10:00 PM.
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Old 02-05-2007, 01:53 PM   #2
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I may have something that bolts up, I'll let you know once you post the pictures.
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Old 02-05-2007, 02:38 PM   #3
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I have a wastegate bracket which I don't need, but it is holding turbine housing. I'd like to trade bracket to normal double washer plate.

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Old 02-05-2007, 09:53 PM   #4
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Quote:
Originally Posted by PAT! View Post
I may have something that bolts up, I'll let you know once you post the pictures.
thanks

Anybody have any opinions on what psi wastegate I should buy?
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Old 02-06-2007, 12:09 AM   #5
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Whatever psi lets you run a MBC. Maybe 8 or 10? You don't want it to be too far below your desired boost.
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Old 02-06-2007, 12:11 AM   #6
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Originally Posted by UofACATS View Post
Whatever psi lets you run a MBC. Maybe 8 or 10? You don't want it to be too far below your desired boost.
Thats what I was thinking...seems anything in that area is hard to find.
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Old 02-06-2007, 10:12 AM   #7
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I've got 5-10 psi springs.
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Old 02-06-2007, 09:44 PM   #8
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Here is where I need to get a bracket for...
Name:  IMG_0442-1.jpg
Views: 5
Size:  7.0 KB



looks similar to this one I guess?
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Old 02-07-2007, 12:22 AM   #9
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Any wastegate actuator can be made to work really, just drill and tap the compressor housing, you can bolt-on whatever you desire.

Find an actuator that has bolt-on capability and you're good to go.
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Old 02-07-2007, 12:25 AM   #10
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Old 02-07-2007, 12:51 AM   #11
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or get a alumium bracket welded on.
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Need Advice: GT25R Wastegate & Bracket-1fe3_1.jpg  
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Old 02-07-2007, 10:38 AM   #12
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What sort of room are you working with? Would it be possible to reposition the body of the WGA more like the one that turbopezz posted?
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Old 02-07-2007, 10:43 AM   #13
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Quote:
Originally Posted by PAT! View Post
What sort of room are you working with? Would it be possible to reposition the body of the WGA more like the one that turbopezz posted?
huh, I'm not really sure if I could...I need to check how tight it is.

kinda a dumb question, but I assume that it can be clocked the same as a T-25?
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Old 02-07-2007, 10:58 AM   #14
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Usually all that prevents you from clocking a turbo the way you want it is the wastegate. So clock it how you need it and go from there.
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Old 02-08-2007, 12:40 AM   #15
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Quote:
Originally Posted by miatamania View Post
huh, I'm not really sure if I could...I need to check how tight it is.

kinda a dumb question, but I assume that it can be clocked the same as a T-25?
I can see the snap-ring in the first picture you posted, on the cold side. Unhook that sucka and you'll be able to clock the housing. If you need to adjust the center section, loosen the bolts on the hot side too.
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Old 02-08-2007, 01:15 AM   #16
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kk...I thought so, I just didn't want to mess anything up x.X
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