When it comes to boost controllers you have a wealth of options from the complex electronic variants (elctronic boost controllers - EBC) such as the Apexi AVC-R or the simpler Greddy Profec B Spec all the way down to manual boost controllers (MBC) and bleed valves. Bleed valves are frowned upon because they cause issues with control of boost due to the fact they simply bleed air that would go to the wastegate so you have either an EBC or an MBC.
Which do you pick? Up to you, they both do the same job but the EBC offers you a wealth of features such as high/low boost settings, control over how the boost hits etc etc. The MBC is about a tenth of the price.
Either way you are achieving the same goal which is to modify the amount of air that reaches the wastegate actuator (The bit that opens the wastegate and effctively limits the boost). I picked an MBS because it was cheap, simple and I was on a deadline. I may change for an EBC later on but to be honest I think I'm going to be hard pushed trying to justify spending a further £150-200 to replace my £20 MBC that works perfectly well.
The main benefit is increased boost and the that the wastegate won't see any boost pressure until the MBC 'decides' it should open. This means you get a quicker build up of boost due to the fact the wastegate is completely closed until we hit our desired level (on a stock car this is not the case as the wastegate begins to open as soon as a small amount of boost reaches the actuator).
Right, enough intro, if you pick an MBC then here's what you do with it:
Step 1 - Follow the guide for removing the 3000 pipe
Step 2 - Perform step 6 in the lexus/550 fitment guide to remove the accordion hose
Which do you pick? Up to you, they both do the same job but the EBC offers you a wealth of features such as high/low boost settings, control over how the boost hits etc etc. The MBC is about a tenth of the price.
Either way you are achieving the same goal which is to modify the amount of air that reaches the wastegate actuator (The bit that opens the wastegate and effctively limits the boost). I picked an MBS because it was cheap, simple and I was on a deadline. I may change for an EBC later on but to be honest I think I'm going to be hard pushed trying to justify spending a further £150-200 to replace my £20 MBC that works perfectly well.
The main benefit is increased boost and the that the wastegate won't see any boost pressure until the MBC 'decides' it should open. This means you get a quicker build up of boost due to the fact the wastegate is completely closed until we hit our desired level (on a stock car this is not the case as the wastegate begins to open as soon as a small amount of boost reaches the actuator).
Right, enough intro, if you pick an MBC then here's what you do with it:
Step 1 - Follow the guide for removing the 3000 pipe
Step 2 - Perform step 6 in the lexus/550 fitment guide to remove the accordion hose