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turbo related..waste gate

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Old Apr 1, 2004 | 08:15 PM
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cochese's Avatar
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Default turbo related..waste gate

35mm...38mm...40mm...50mm????

is it the more boost the bigger????
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Old Apr 1, 2004 | 08:52 PM
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From Tials site:

Flow capacity. Contrary to popular belief, larger higher HP applications do not necessarily require the largest wastegate available. The lower the boost pressure you are gunning for the larger your wastegate needs to be. An engine/turbo combination that is set to 25+psi has a smaller wastegate flow requirement than the same application set to 7 psi. This is because the wastegate is used to lower the boost not raise it, the lower the boost pressure is set the more flow the wastegate must allow.
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Old Apr 2, 2004 | 06:40 AM
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Originally posted by Vapor
35-38mm is more than sufficient to 450whp
what about 450-550
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Old Apr 2, 2004 | 07:41 AM
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Originally posted by mtber
From Tials site:

Flow capacity. Contrary to popular belief, larger higher HP applications do not necessarily require the largest wastegate available. The lower the boost pressure you are gunning for the larger your wastegate needs to be. An engine/turbo combination that is set to 25+psi has a smaller wastegate flow requirement than the same application set to 7 psi. This is because the wastegate is used to lower the boost not raise it, the lower the boost pressure is set the more flow the wastegate must allow.
Exactly, except for the fact that you have to add engine displacement and compression into the equation. The more exhaust gas energy you produce the larger the wastegate may need to be.
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Old Apr 2, 2004 | 09:25 AM
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sooo...where's the turbo?
 
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p1v1=p2v2, pressure and volume are inversely related, so it would make sense that a larger wastegate is better for low boost. if you're only boosting 7 psi, then alllll the excess pressure must fly down the wastegate, whereas if you were at 30 psi, there would be less pressure going to the wastegate and more to the engine. right?
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Old Apr 3, 2004 | 12:27 PM
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since you're doing such a high hp setup you should just get a a 35mm cause you dont need a 40. but if the price isnt much different then i guess it doesn't matter. but im sure money isn't an issue.
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Old Apr 6, 2004 | 12:23 PM
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whats this going in?
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