cant control boost
05-22-2009, 02:10 PM
#1
Drifting
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cant control boost
I have a LR duel port waist gate and a MBC and i cant control the boost. got into the the othre day and it climbed to 20 and i let off the gas. Any idea what might be the problem? I have all the hoses hooked up according too the LR web site.
05-22-2009, 02:22 PM
#3
Burning Brakes
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Dude. Why have you been asking such n00b questions lately? Boost control is a very simple system. Your waste gate could be seized, MBC adjusted wrong, vacuum leak.
05-22-2009, 02:54 PM
#4
Burning Brakes
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First thing to check is to see if the MBC has the hoses going in the correct direction, usually there is a arrow or something to show the flow direction from the manifold to the wastegate. Mixing this up will reverse the operation of the **** or at least it did for me one time when I didn't look carefully.
The other is a blown diaphragm or frozen valve in the wastegate. For the Lindsey unit if you clamp off the lines to the wastegate and the diaphragm is good and the valve not stuck, then I believe the wastegate should start opening around 10psi, contact Lindsey for confirmation.
The other is a blown diaphragm or frozen valve in the wastegate. For the Lindsey unit if you clamp off the lines to the wastegate and the diaphragm is good and the valve not stuck, then I believe the wastegate should start opening around 10psi, contact Lindsey for confirmation.
05-22-2009, 05:34 PM
#5
Drifting
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thats what i was looking for reguarding the waist gate. The hoses arent switched. the MBC is bran new and the waist gate i assume is in good condition but i will check it like you said.
05-22-2009, 06:10 PM
#6
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Disconnect the hose from the side fitting of the wasegate and drive the car. It should result if far less
boost. If so, then it's a control issue. Either plumbing or the MBC.
boost. If so, then it's a control issue. Either plumbing or the MBC.
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Mike or Dave Lindsey
www.lindseyracing.com
U.S. 1-877-943-3565
Other 1-405-947-0137
Mike or Dave Lindsey
www.lindseyracing.com
U.S. 1-877-943-3565
Other 1-405-947-0137
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05-22-2009, 10:25 PM
#8
Drifting
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ok thats what ill do then. Thanks Mike. BTW with LRs softwear the car is amazing. Just need to change the fuel maps on idle a little but its purly amazing.
05-24-2009, 01:41 PM
#10
Drifting
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So i clamped off the hose going too the side of the waist gate and the boost dropped to around 15lbs. maybe ill tighten the clamp and see if it drops more. All the plumbing is correct so this would lead too the MBC not working correctly
