how to set boost?
25-07-2007, 11:28 AM
#1
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how to set boost?
iv put a new turbo on..how can i set he boost as i messed around with the actuator.. just basicall need to know how to..as its going for a dyno run on friday and iv gota drive the car down there
cheers
cheers
25-07-2007, 01:19 PM
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25-07-2007, 01:40 PM
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dont you need to make sure your car is fuelling ok for the boost setting on your new turbo? You'd need a wideband to make sure you dont melt it.
Then use your gauge to set it up.
Then use your gauge to set it up.
25-07-2007, 01:45 PM
#7
Originally Posted by R5FORD
but how do i know how much boost its going to be running? and can anyone suggest how far i need the rod to be to get around 340ish on a t34.48?
maybe more - whatever your map requires I supposeBut you'll need your gauge in there first
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25-07-2007, 02:17 PM
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Originally Posted by boXXer
dont you need to make sure your car is fuelling ok for the boost setting on your new turbo? You'd need a wideband to make sure you dont melt it.
Then use your gauge to set it up.
Then use your gauge to set it up.
25-07-2007, 03:48 PM
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just connect everything up to how it was and let them set it up for you....you'll never get it right by guessing.
just drive off boost most of the way there, and also if it's been overfuelling then have an oil change when you arrive
just drive off boost most of the way there, and also if it's been overfuelling then have an oil change when you arrive
25-07-2007, 10:26 PM
#19
i dont know just know my boost is control through my amel valve they set my actuator to a certain load then programmed my chip to make the amel valve control the boost plus they adjust the holes in the valve but that was when they was live mapping it
but that was when they was live mapping it
25-07-2007, 10:29 PM
#20
the spike is controlled by the amal valve, and the resrictor port is removed so the valve can get rid of enough air as it will be much more than it was designed for, but the boost(hold fig) is adjusted by the pre load on the wastegate actuator arm
25-07-2007, 10:35 PM
#23
Amal valve,or boost control solenoid as its sometimes called, this is how the ecu controls the amount of boost the turbo makes ,like an elactronic bleed valve in effect.
it also allows the boost to have a peak and hold figure, as the boost will spike when the valve is opening, then return to its hold figure when it closes off at the top of the boost range.
some people do away with them and just fit a bleed valve in between, but then you can only run the hold figure of boost and not have a nice spike to give a tad more torque where its needed
the amal valve basicly stops the wastegate actuator seeing the full amount of boost pressure coming from the compressor housing ,it does this by opening and closing a electronic valve, which bleeds some of the boosted air to atmosphere
take this example ,your wastegate actuator is set with a small pre load, and will open at 15psi.
the turbo is making 15 psi, so the wastegate should open preventing the turbo from making any more boost, BUT the amal valve is opening and closing very quickly allowing 5 psi to escape to atmosphere, all of a sudden your turbo is making 20psi before the wastegate actuator can see the 15psi it opens at. HERE IS YOUR PEAK FIGURE,
Then as the rpm climbs ,the ecu tells the to valve stop opening and it stays closed, the wastegate actuator can now see the full amount of boost made by the turbo and only allows 15psi before it opens the wastegate to prevent any more, HERE IS THE HOLD FIGURE.
__________________
it also allows the boost to have a peak and hold figure, as the boost will spike when the valve is opening, then return to its hold figure when it closes off at the top of the boost range.
some people do away with them and just fit a bleed valve in between, but then you can only run the hold figure of boost and not have a nice spike to give a tad more torque where its needed
the amal valve basicly stops the wastegate actuator seeing the full amount of boost pressure coming from the compressor housing ,it does this by opening and closing a electronic valve, which bleeds some of the boosted air to atmosphere
take this example ,your wastegate actuator is set with a small pre load, and will open at 15psi.
the turbo is making 15 psi, so the wastegate should open preventing the turbo from making any more boost, BUT the amal valve is opening and closing very quickly allowing 5 psi to escape to atmosphere, all of a sudden your turbo is making 20psi before the wastegate actuator can see the 15psi it opens at. HERE IS YOUR PEAK FIGURE,
Then as the rpm climbs ,the ecu tells the to valve stop opening and it stays closed, the wastegate actuator can now see the full amount of boost made by the turbo and only allows 15psi before it opens the wastegate to prevent any more, HERE IS THE HOLD FIGURE.
__________________
25-07-2007, 10:38 PM
#24
Originally Posted by JTECHSAFF
Amal valve,or boost control solenoid as its sometimes called, this is how the ecu controls the amount of boost the turbo makes ,like an elactronic bleed valve in effect.
it also allows the boost to have a peak and hold figure, as the boost will spike when the valve is opening, then return to its hold figure when it closes off at the top of the boost range.
some people do away with them and just fit a bleed valve in between, but then you can only run the hold figure of boost and not have a nice spike to give a tad more torque where its needed
the amal valve basicly stops the wastegate actuator seeing the full amount of boost pressure coming from the compressor housing ,it does this by opening and closing a electronic valve, which bleeds some of the boosted air to atmosphere
take this example ,your wastegate actuator is set with a small pre load, and will open at 15psi.
the turbo is making 15 psi, so the wastegate should open preventing the turbo from making any more boost, BUT the amal valve is opening and closing very quickly allowing 5 psi to escape to atmosphere, all of a sudden your turbo is making 20psi before the wastegate actuator can see the 15psi it opens at. HERE IS YOUR PEAK FIGURE,
Then as the rpm climbs ,the ecu tells the to valve stop opening and it stays closed, the wastegate actuator can now see the full amount of boost made by the turbo and only allows 15psi before it opens the wastegate to prevent any more, HERE IS THE HOLD FIGURE.
__________________
it also allows the boost to have a peak and hold figure, as the boost will spike when the valve is opening, then return to its hold figure when it closes off at the top of the boost range.
some people do away with them and just fit a bleed valve in between, but then you can only run the hold figure of boost and not have a nice spike to give a tad more torque where its needed
the amal valve basicly stops the wastegate actuator seeing the full amount of boost pressure coming from the compressor housing ,it does this by opening and closing a electronic valve, which bleeds some of the boosted air to atmosphere
take this example ,your wastegate actuator is set with a small pre load, and will open at 15psi.
the turbo is making 15 psi, so the wastegate should open preventing the turbo from making any more boost, BUT the amal valve is opening and closing very quickly allowing 5 psi to escape to atmosphere, all of a sudden your turbo is making 20psi before the wastegate actuator can see the 15psi it opens at. HERE IS YOUR PEAK FIGURE,
Then as the rpm climbs ,the ecu tells the to valve stop opening and it stays closed, the wastegate actuator can now see the full amount of boost made by the turbo and only allows 15psi before it opens the wastegate to prevent any more, HERE IS THE HOLD FIGURE.
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