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Wastegate Explained.
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<blockquote data-quote="speed2horizon" data-source="post: 3485987" data-attributes="member: 30831"><p>Boost consistency is just a term i used to describe about stability of the boost. I.e. no boost spike/fluctuation when full boost.</p><p></p><p><strong>INTERNAL WASTEGATE</strong></p><p>[ATTACH=full]665693[/ATTACH]</p><p></p><p>It's normally used by OEM's turbo. However, Internal wastegate is actuated by an actuator that is mounted on the turbo itself. The thing that looks like Popeye's pipe with an extended rod. As time goes by, there will be problem with actuator spring strength, diaphragm leaks and other issues. But new actuator is not easy to find and expensive, but secondhand actuator depends so much on the luck of buying... So, most of the people will prefer the <strong>external wastegate</strong>.</p><p></p><p><strong>EXTERNAL WASTEGATE</strong></p><p>[ATTACH=full]665694[/ATTACH] </p><p>or as the picture by sdf.</p><p></p><p>The boost is more stable due to better quality spring. And if there is anything wrong with the spring or diaphragm, those things are replaceable. Most of the ppl will have the wastepipe exposed to the environment to reduce the restriction within the exhaust piping. When external wastegate is actuated, the excess exhaust goes through the wastepipe and create sound like lorry/exhaust bocor. Some ppl call likes it. But I call it noise... Just personal preference.</p><p></p><p>However, the wastepipe can also be directed back into the main exhaust pipe unit. But will create minor performance loss that u may not even feel/realize.</p><p>And for most people, they install external wastegate is more for the "noise" and the look... But for me, i'll install it when my actuator goes to heaven...</p><p></p><p>Or maybe when i wanna upboost and boost stability is required...</p></blockquote><p></p>
[QUOTE="speed2horizon, post: 3485987, member: 30831"] Boost consistency is just a term i used to describe about stability of the boost. I.e. no boost spike/fluctuation when full boost. [B]INTERNAL WASTEGATE[/B] [ATTACH=full]665693[/ATTACH] It's normally used by OEM's turbo. However, Internal wastegate is actuated by an actuator that is mounted on the turbo itself. The thing that looks like Popeye's pipe with an extended rod. As time goes by, there will be problem with actuator spring strength, diaphragm leaks and other issues. But new actuator is not easy to find and expensive, but secondhand actuator depends so much on the luck of buying... So, most of the people will prefer the [B]external wastegate[/B]. [B]EXTERNAL WASTEGATE[/B] [ATTACH=full]665694[/ATTACH] or as the picture by sdf. The boost is more stable due to better quality spring. And if there is anything wrong with the spring or diaphragm, those things are replaceable. Most of the ppl will have the wastepipe exposed to the environment to reduce the restriction within the exhaust piping. When external wastegate is actuated, the excess exhaust goes through the wastepipe and create sound like lorry/exhaust bocor. Some ppl call likes it. But I call it noise... Just personal preference. However, the wastepipe can also be directed back into the main exhaust pipe unit. But will create minor performance loss that u may not even feel/realize. And for most people, they install external wastegate is more for the "noise" and the look... But for me, i'll install it when my actuator goes to heaven... Or maybe when i wanna upboost and boost stability is required... [/QUOTE]
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