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MazdaSpeed 3/6 - Turbo Induction MazdaSpeed 3/6 - Turbo Induction - Have a turbo, intercooler, downpipe question? Anything turbo related belongs here!


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 Old 06-01-2010, 11:52 AM   #1
 
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Default Proper wastegate?

Which wastegate would you suggest for a GT3071r setup? what sizing is proper? what factor determines the size? sorry im not very adverse with wastegate knowledge, all i know is that they are of the most important parts of a turbo system but also most commonly overlooked...id like to learn about wastegates for the ms6 and the turbo setups so anyone who wants to share what they know please do so.


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 Old 06-15-2010, 07:35 AM   #2
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im not BT myself, but you should be able to search this i believe
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 Old 06-15-2010, 06:07 PM   #3
 
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yeah i did i was just trying to get an answer quicker haha
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 Old 06-15-2010, 06:10 PM   #4
 
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38mm Tial V band
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 Old 06-15-2010, 06:11 PM   #5
 
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listen to brian. i ran a 44mm... didnt hurt anything, just didnt need to have a WG that big.
your next question... which spring? i suck with that so im no help
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 Old 06-15-2010, 06:17 PM   #6
 
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depends on how much boost u plan on running and how u wanna control it. I personally just wanted to run spring pressure so i ran a 20 psi spring for constant 20psi. if u will have some sort of boost control get a spring the same or a few PSI less then the least amount of boost u wanna run, and up it with the boost controller to your desired setting
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 Old 11-04-2010, 09:04 AM   #7
 
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Sorry to wake up an old thread but when you are running on just spring pressure do you just bypass the wastegate actuator?

When using the wastegate actuator you get a spring for your min boost then use a boost controller to set it to a higher target?

What is the stock Wastegate spring set to anyway? I'm guessing it is around 10 psi (where stock boost is limited to in first and second gear).
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 Old 11-07-2010, 10:10 PM   #8
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Originally Posted by RichB View Post
Sorry to wake up an old thread but when you are running on just spring pressure do you just bypass the wastegate actuator?

When using the wastegate actuator you get a spring for your min boost then use a boost controller to set it to a higher target?

What is the stock Wastegate spring set to anyway? I'm guessing it is around 10 psi (where stock boost is limited to in first and second gear).
yup you're exactly right. stock spring 12lbs
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 Old 11-08-2010, 07:08 AM   #9
 
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Yea, I was looking at how the stock wastegate is plumbed and it makes a lot more sense now.

What are the pros and cons of doing straight spring pressure?

If I was doing a custom set-up I'd probably tune to 18 PSI and get a 15 PSI spring in the wastegate but I never thought about straight spring pressure. Which route is the better way?
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