more boost?
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Registered User
Joined: Aug 2009
Posts: 7
From: Hawaii
Car Info: 2002 impreza wrx
more boost?
Can i get more boost out of the stock turbo, without buying anything? Had a friend that made a bigger hole in a diaphram (think it was for the wastegate) and got more boost. Is it posible?
Last edited by kingk; Aug 8, 2009 at 02:47 AM.
Registered User
Joined: Sep 2009
Posts: 13
From: Erie, PA
Car Info: WRB Stage 2 Bugeye
they only way to saefly get more boost is a tune, our cars ecu's control the boost. TBE, intake, gutted or catless UP, then open source stage 2 map or cobb AP will up your boost and keep smiles on ur face. or just take ur car to a tuner, but do NOT get a manual boost controller for more boost our cars are not engineered for those. so you want more boost, buy parts or go get tuned.
Da Brit.
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From: Bay Area, CA
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they only way to saefly get more boost is a tune, our cars ecu's control the boost. TBE, intake, gutted or catless UP, then open source stage 2 map or cobb AP will up your boost and keep smiles on ur face. or just take ur car to a tuner, but do NOT get a manual boost controller for more boost our cars are not engineered for those. so you want more boost, buy parts or go get tuned.
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Joined: Nov 2002
Posts: 65
From: Elizabethtown, Pa
Car Info: 2003 sonic yellow WRX, Vishnu Stage 1, Perin Inter
I have a question for Johndabrit, just for curiosity sake....why would you install a MBC then have the car tuned to run with the boost controller? Why wouldn't you have the factory ECU tuned to increase the boost pressure? That way you would still keep the factory ECU safety features? Seems to me the MBC in unnecessary. Is there an advantage to this?
Da Brit.
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From: Bay Area, CA
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I have a question for Johndabrit, just for curiosity sake....why would you install a MBC then have the car tuned to run with the boost controller? Why wouldn't you have the factory ECU tuned to increase the boost pressure? That way you would still keep the factory ECU safety features? Seems to me the MBC in unnecessary. Is there an advantage to this?
improved consistency with rock solid peak boost numbers
faster spool times. (getting an up-pipe will help this also)
provide a boost level which simply will not be exceeded to prevent spikes and overboost. (overcharging)
It's more about efficiency over capability. The downside in a MBC setup is that should something go wrong with your setup, your ECU has no way of controlling your boost. It might be trying to cut boost, but since it has no control, it can't and you can end up blowing things up. There is also a theory that for example, 18psi on mbc is 18lbs no matter where the throttle is and can lead to motor issues as peak boost on partial throttle can be bad. I don't have enough experience on this to make a verdict. Your thoughts?
Last edited by johndabrit; Sep 4, 2009 at 09:57 PM. Reason: adding more detail
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the perks are:
improved consistency with rock solid peak boost numbers
faster spool times. (getting an up-pipe will help this also)
provide a boost level which simply will not be exceeded to prevent spikes and overboost. (overcharging)
It's more about efficiency over capability. The downside in a MBC setup is that should something go wrong with your setup, your ECU has no way of controlling your boost. It might be trying to cut boost, but since it has no control, it can't and you can end up blowing things up. There is also a theory that for example, 18psi on mbc is 18lbs no matter where the throttle is and can lead to motor issues as peak boost on partial throttle can be bad. I don't have enough experience on this to make a verdict. Your thoughts?
improved consistency with rock solid peak boost numbers
faster spool times. (getting an up-pipe will help this also)
provide a boost level which simply will not be exceeded to prevent spikes and overboost. (overcharging)
It's more about efficiency over capability. The downside in a MBC setup is that should something go wrong with your setup, your ECU has no way of controlling your boost. It might be trying to cut boost, but since it has no control, it can't and you can end up blowing things up. There is also a theory that for example, 18psi on mbc is 18lbs no matter where the throttle is and can lead to motor issues as peak boost on partial throttle can be bad. I don't have enough experience on this to make a verdict. Your thoughts?
The MBC's main advantage is response and consistency. Part throttle boost conditions are 100% safe as long as the tune is set up to handle it. The idea that it is dangerous comes from 2003 before the open loop/closed loop switchover maps were discovered in the ECU.
Thanks
-- Ed
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To the OP, you need to get the car tuned to safely raise boost levels. Do not just try to trick the ECU or mechanically raise boost as the stock tune is not set up for this and will cause damage to the engine over time.
-- Ed
-- Ed
Da Brit.
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From: Bay Area, CA
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This is mostly right.
The MBC's main advantage is response and consistency. Part throttle boost conditions are 100% safe as long as the tune is set up to handle it. The idea that it is dangerous comes from 2003 before the open loop/closed loop switchover maps were discovered in the ECU.
Thanks
-- Ed
The MBC's main advantage is response and consistency. Part throttle boost conditions are 100% safe as long as the tune is set up to handle it. The idea that it is dangerous comes from 2003 before the open loop/closed loop switchover maps were discovered in the ECU.
Thanks
-- Ed
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