wastegate plumbing
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Wastegate Plumbing
The manifold is a new factory Mazda part from I believe from an 88 year model. should I be using a factory wastegate? if an aftermarket wastegate is required with the OEM Mazda manifold should I use a 38mm or 40mm? And what's the difference between the two?
#4
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A T4 turbo will require an aftermarket manifold, so if that's what you really have, it's not going to be using the stock exhaust manifold off of an FC. If that's the case, you should already have an external wastegate.
If you really have a stock FC turbo or a hybrid turbo (stock exhaust side, upgraded compressor), then yes, you could still have the stock manifold on there. If that's the case, your wastegate is internal, and will be 13mm (S4) or 31mm equivalent (S5).
Take a picture of your manifold and both sides of the turbo, and I can tell you what it is.
If you really have a stock FC turbo or a hybrid turbo (stock exhaust side, upgraded compressor), then yes, you could still have the stock manifold on there. If that's the case, your wastegate is internal, and will be 13mm (S4) or 31mm equivalent (S5).
Take a picture of your manifold and both sides of the turbo, and I can tell you what it is.
#5
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Tial 40-50mm is your friend.
Too expensive?
Go on ebay and buy a no-name. They work just the same. I've taken apart a turbonetics evo 38mm gate and one of the chinese 38mm gates and they are basically identical. Shouldn't have anything to worry about. If the supra forum guys trust them and guys use them for years without problems on their civics and whatnot, it should be fine for you.
Too expensive?
Go on ebay and buy a no-name. They work just the same. I've taken apart a turbonetics evo 38mm gate and one of the chinese 38mm gates and they are basically identical. Shouldn't have anything to worry about. If the supra forum guys trust them and guys use them for years without problems on their civics and whatnot, it should be fine for you.
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http://www.fc3spro.com/TECH/HOWTO/KWG/kwg.html
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Okay, so do I need a wastegate? What am I missing that connects to the wastegate flapper door? Can you send me pics or refer me to a site that illustrates what I need to move forward?
#10
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There are lot of pictures of the internal wastegate in the link I provided. The wastegate is there, but you're missing the wastegate actuator. It would normally be attached to the compressor housing and have a linkage attached to the wastegate arm. Buy a stock FC turbo and take it off of there. I doubt someone will sell you the actuator by itself.
Last edited by RotaryRocket88; 10-26-08 at 08:25 PM.
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