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SportTrac Discussion
Engine & Drivetrain
STS Remote Mount Turbo Systems
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<blockquote data-quote="Tom Schindler" data-source="post: 897367" data-attributes="member: 56140"><p>You said a Blow Off Valve was used in racing aplications to dump exhaust gasses into the atmosphere. That is completely wrong.</p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p>This is a perfectly correct, but worthless answer. All engines dump exhaust into the atmosphere. Even Mercedes-Benz vehicles do too. How do they do this? It is called an exhaust pipe. Race cars use open headers, but stick a converter and muffler onto that same vehicle, and it is street legal. Your point?</p><p></p><p></p><p></p><p>Wastegates are designed to limit boost. If there is no wastegate installed, the turbo would continue to boost until the turbo is maxed out.</p><p></p><p></p><p></p><p>A BOV was designed to vent the intake charge when shifting gears. That keeps the turbo spinning freely helping to eliminate lag.</p><p></p><p></p><p></p><p>What is boost lag? Boost lag is the time between the exhaust system starting to spin the turbine to build pressure. At idle, there is little to no boost being produced. When you punch it, the turbine spins, the boost builds and then you get power.</p><p></p><p></p><p></p><p>How would eliminating a wastegate eliminate boost lag?</p><p></p><p></p><p></p><p>Since you are the expert, please explain.</p><p></p><p></p><p></p><p></p><p></p><p>Tom</p></blockquote><p></p>
[QUOTE="Tom Schindler, post: 897367, member: 56140"] You said a Blow Off Valve was used in racing aplications to dump exhaust gasses into the atmosphere. That is completely wrong. This is a perfectly correct, but worthless answer. All engines dump exhaust into the atmosphere. Even Mercedes-Benz vehicles do too. How do they do this? It is called an exhaust pipe. Race cars use open headers, but stick a converter and muffler onto that same vehicle, and it is street legal. Your point? Wastegates are designed to limit boost. If there is no wastegate installed, the turbo would continue to boost until the turbo is maxed out. A BOV was designed to vent the intake charge when shifting gears. That keeps the turbo spinning freely helping to eliminate lag. What is boost lag? Boost lag is the time between the exhaust system starting to spin the turbine to build pressure. At idle, there is little to no boost being produced. When you punch it, the turbine spins, the boost builds and then you get power. How would eliminating a wastegate eliminate boost lag? Since you are the expert, please explain. Tom [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
STS Remote Mount Turbo Systems
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