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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Full Race Stock Location Turbos
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<blockquote data-quote="COBB Tuning" data-source="post: 1362197" data-attributes="member: 30143"><p>A big plus with this kit is that the factory electronic wastegate actuators are re-used. </p><p></p><p>Boost control on most other turbocharged engines that we've become familiar with uses a vacuum diaphragm and spring to open and close the wastegate. A boost control solenoid can take a frequency signal from the ECU to bleed off some of the pressure reference to the diaphragm to keep the wastegate closed for longer and build more boost pressure. These systems have a lot more nuance, but you can consider this a 10,000ft. view.</p><p></p><p>On the Raptor, you've got an electronic wastegate actuator per turbo that receives a commanded position signal from the ECU to open and close the wastegates and modulate exhaust flow through the turbo. Electronic wastegates offer super quick response, huge improvements in precision, and will hopefully be more reliable in the long term since you don't have to worry about leaking vacuum lines. </p><p></p><p>BUT, to my knowledge there does not appear to be any way to convert the signal delivered to the electronic wastegates in the factory harness to a signal that could be used by a boost control solenoid. This means that if you install turbos on your Raptor that do not use electronic wastegates, you lose the ability for the ECU to operate the wastegates. Ford boost control is super advanced and works really well in a wide range of environments, so I think you'd be hard pressed to implement an auxiliary, standalone boost control system that works anywhere near as reliably. As a calibrator, I definitely know which way that I would push a customer.</p><p></p><p>Just something to consider when selecting turbos!</p><p></p><p>-Sam@COBB</p></blockquote><p></p>
[QUOTE="COBB Tuning, post: 1362197, member: 30143"] A big plus with this kit is that the factory electronic wastegate actuators are re-used. Boost control on most other turbocharged engines that we've become familiar with uses a vacuum diaphragm and spring to open and close the wastegate. A boost control solenoid can take a frequency signal from the ECU to bleed off some of the pressure reference to the diaphragm to keep the wastegate closed for longer and build more boost pressure. These systems have a lot more nuance, but you can consider this a 10,000ft. view. On the Raptor, you've got an electronic wastegate actuator per turbo that receives a commanded position signal from the ECU to open and close the wastegates and modulate exhaust flow through the turbo. Electronic wastegates offer super quick response, huge improvements in precision, and will hopefully be more reliable in the long term since you don't have to worry about leaking vacuum lines. BUT, to my knowledge there does not appear to be any way to convert the signal delivered to the electronic wastegates in the factory harness to a signal that could be used by a boost control solenoid. This means that if you install turbos on your Raptor that do not use electronic wastegates, you lose the ability for the ECU to operate the wastegates. Ford boost control is super advanced and works really well in a wide range of environments, so I think you'd be hard pressed to implement an auxiliary, standalone boost control system that works anywhere near as reliably. As a calibrator, I definitely know which way that I would push a customer. Just something to consider when selecting turbos! -Sam@COBB [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Full Race Stock Location Turbos
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