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Bleed Valves Rant

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Old 02-02-2011, 10:04 PM
  #121  
series_one_rst
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Originally Posted by chaffe
with the wastegate being set soo soft it can actually be opened by the exaust pressure itself ya
causing the turbo to over work, I'm guessing? so if I use the bleed valve to raise boost will this still be picked up by megasquirt and the fuelling adjusted to meet it.

sorry for the post hijack by the way. lol
Old 03-02-2011, 01:23 PM
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chaffe
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Originally Posted by series_one_rst
causing the turbo to over work, I'm guessing? so if I use the bleed valve to raise boost will this still be picked up by megasquirt and the fuelling adjusted to meet it.

sorry for the post hijack by the way. lol
NO, just causing the turbo to slow down as the back pressure that drives it has dropped. MS uses MAP sensing and so will always fuel to the manifold pressure, regarless of a boost leak or how you have raised/lowered the boost.
Old 03-02-2011, 02:35 PM
  #123  
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Originally Posted by chaffe
NO, just causing the turbo to slow down as the back pressure that drives it has dropped. MS uses MAP sensing and so will always fuel to the manifold pressure, regarless of a boost leak or how you have raised/lowered the boost.
yes but wont it work twice as hard to get up to pressure if the exhaust gas is opening the waste gate or would it just not reach the boost level?

i thought that ms would`ve picked it up. so really if i set the base on the actuator to open around 15psi then use the bleed valve to hike up to 20psi with ms mapped properly at these pressures and rev ranges there shouldn`t be a problem??

then there`s the matter of the boost leak, is it such a bad thing as the wideband and map are keeping tabs on it? starting to seem like an easier option to just keep it set at 20 psi and done with it. lol
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