Questions about Dual stage boost controllers
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Questions about Dual stage boost controllers
Correct me if I am wrong but with a stock WRX the ECU curently controls the wastegate. I am considering installing a TurboXS dual stage boost controller but I am concerned that the ECU may not see pressure from the boost controller and throw a code. Worse the ECU may retard timing or air/fuel mixture due to not see boost pressure.
Has anyone seen either problem?
Interested in any feedback from running the dual stage controller.
Thanks
FTRracing
Has anyone seen either problem?
Interested in any feedback from running the dual stage controller.
Thanks
FTRracing
Guest
Posts: n/a
Correct me if I am wrong but with a stock WRX the ECU curently controls the wastegate. I am considering installing a TurboXS dual stage boost controller but I am concerned that the ECU may not see pressure from the boost controller and throw a code. Worse the ECU may retard timing or air/fuel mixture due to not see boost pressure.
alan
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Joined: Dec 2002
Posts: 2,859
From: Flying on the H1 w/ 75 psi of compression on all 4 cyl
Car Info: PnP VF30 w/ STi injectors Perrin intake walbro fuel pump w/ a TXS TBE
I had the Dual stage boost controller 
It was useless for me. Ask yourself this do you really need a dual stage boost controller?? Do you really need a switch in the cabin that allows you to switch from 12 psi to 16psi or any other set of boost you desire?? You would still have to go into the engine bay to set the desired boost. Let me tell you what i think the dual Stage BC was designed for. I think it was designed for a rear or front wheel drive car, at a launch they could set a low boost so they would no lose traction, then after switching to the next gear were they feel they have more traction they switch to the 2nd stage of boost (which is ususally higher) for more power. You see what im saying?? You could save up another another 2 or 300 bucks and get a EBC which you will really benifit from, and then you can set your boost from inside your car, if that what matters to you. Good luck 
It was useless for me. Ask yourself this do you really need a dual stage boost controller?? Do you really need a switch in the cabin that allows you to switch from 12 psi to 16psi or any other set of boost you desire?? You would still have to go into the engine bay to set the desired boost. Let me tell you what i think the dual Stage BC was designed for. I think it was designed for a rear or front wheel drive car, at a launch they could set a low boost so they would no lose traction, then after switching to the next gear were they feel they have more traction they switch to the 2nd stage of boost (which is ususally higher) for more power. You see what im saying?? You could save up another another 2 or 300 bucks and get a EBC which you will really benifit from, and then you can set your boost from inside your car, if that what matters to you. Good luck
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Questions about Dual stage boost controllers
Thanks for your replys. I guess that I should provide some additional detail.
- The car is a prepped WRX that we are running in both SCCA and CARS rally events.
- Currently has a Prodrive ECU though we are considering moving to a different ECU that would allow us to change the engine maps
- We are looking for the DSBC as a form of traction control at the start of the stage. Since we cannot run an ECU with traction control this is the next best approach.
We recently transitioned to the WRX so we are still trying to understand some of the particulars regarding the engine management system.
Thanks again for the input and keep it coming.
FTR racing
- The car is a prepped WRX that we are running in both SCCA and CARS rally events.
- Currently has a Prodrive ECU though we are considering moving to a different ECU that would allow us to change the engine maps
- We are looking for the DSBC as a form of traction control at the start of the stage. Since we cannot run an ECU with traction control this is the next best approach.
We recently transitioned to the WRX so we are still trying to understand some of the particulars regarding the engine management system.
Thanks again for the input and keep it coming.
FTR racing
Registered User
Joined: Aug 2003
Posts: 75
From: Thousand Oaks, CA, USA
Car Info: WR Blue WRX
The factory boost solenoid regulates the opening of the wastegate and is not a pressure sensor that helps control afr. If you look at where the tubes for the factory solenoid come from off of the turbo outlet and the intake system
The pressure sensor that does control the afr and senses boost is located on the throttle body so that it has an accurate measure of what the manifold pressure really is.
You will recieve a cel if you don't connect it properly but if it is all done right you should be in the clear. The only other problem is the partial throttle full boost issue but since this isn't a daily driver I doubt you will be plauged with this issue.
-skooter
The pressure sensor that does control the afr and senses boost is located on the throttle body so that it has an accurate measure of what the manifold pressure really is.
You will recieve a cel if you don't connect it properly but if it is all done right you should be in the clear. The only other problem is the partial throttle full boost issue but since this isn't a daily driver I doubt you will be plauged with this issue.
-skooter
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