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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
bov block off plate
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<blockquote data-quote="JMEngineer" data-source="post: 1446284" data-attributes="member: 24125"><p>Removing the BOV completely is a BAD idea. Closed-throttle surge may not be as bad as open-throttle surge but it will still cause damage.</p><p></p><p>Going VTA may not be great for the truck either - I don't know enough about the Raptor to say for sure. The 2.3L Mazdaspeed engine (EcoBoost predecessor) tuning was based primarily on mass air flow. If that's also the case for the Raptor, switching to VTA will cause it to run very rich momentarily any time the BOV opens. This isn't necessarily "bad" for the engine but it could contribute to issues developing long-term. It can also cause some hesitation if you let off and then immediately get back on the gas.</p><p>I run turbosmart 50/50 BOV's in my high power cars. At lower boost it recirculates everything. VTA only happens when the recirc is too much of a restriction. It still sounds good and the air that does get recirc'd helps a lot with the rich condition.</p><p></p><p></p><p></p><p></p><p>Your powerstroke doesn't have a throttle body either - power is managed by how much fuel is injected. When you let off, fuel is cut but the pressurized air continues to flow through the engine so surge is not an issue.</p><p>Some newer diesel engines do have throttle bodies but, as far as I know, they're only used for improved emissions and are not required for normal operation like in a gas engine.</p></blockquote><p></p>
[QUOTE="JMEngineer, post: 1446284, member: 24125"] Removing the BOV completely is a BAD idea. Closed-throttle surge may not be as bad as open-throttle surge but it will still cause damage. Going VTA may not be great for the truck either - I don't know enough about the Raptor to say for sure. The 2.3L Mazdaspeed engine (EcoBoost predecessor) tuning was based primarily on mass air flow. If that's also the case for the Raptor, switching to VTA will cause it to run very rich momentarily any time the BOV opens. This isn't necessarily "bad" for the engine but it could contribute to issues developing long-term. It can also cause some hesitation if you let off and then immediately get back on the gas. I run turbosmart 50/50 BOV's in my high power cars. At lower boost it recirculates everything. VTA only happens when the recirc is too much of a restriction. It still sounds good and the air that does get recirc'd helps a lot with the rich condition. Your powerstroke doesn't have a throttle body either - power is managed by how much fuel is injected. When you let off, fuel is cut but the pressurized air continues to flow through the engine so surge is not an issue. Some newer diesel engines do have throttle bodies but, as far as I know, they're only used for improved emissions and are not required for normal operation like in a gas engine. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
bov block off plate
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