[alfredjp]

- can anyone provide me more technical details on the boost functionality on the 08 WRX STI? ive tried searching online, but cant seem to get a comprehensive answer...

- what is the maximum boost/peak boost value?

- does it have a boost cutout when it overshoots? how does the cutout work, ie., fuel cut, etc.?

- what is the worst thing that can happen in an overboost? dooes it really wreck the engine in a single overboost? how really bad is an overboost?

- some acquantainces i know tell me that i need a boost gauge to tell me when the car overboost. however, if the car has a "boost cutout" functionality, why do you still need this (as if the gauge can do anything)?

- how do you prevent overboost? some of my friends tell me that when i need to floor the gas, i should do it in the lower gears (2,3) rather than in the higher ones. this way, i would less likely encounter an overboost. is this correct?

i apologize for the newbie questions... many things to learn!!!

thanks, and much regards...

[Phil 05]

Overboosting will usually throw a CEL and does no real harm in the short term.
After I installed my cbe, I was driving to my tuner and my CEL came on. He told me this was the result of my exhaust system and after he adjusted for the exhaust, no more CEL

[Phil 05]

Overboosting will usually throw a CEL and does no real harm in the short term.
After I installed my cbe, I was driving to my tuner and my CEL came on. He told me this was the result of my exhaust system and after he adjusted for the exhaust, no more CEL. You probably will not encounter overboost unless you do some type of mod that affects the intake or exhaust.

[alfredjp]

Originally Posted by Phil 05

Overboosting will usually throw a CEL and does no real harm in the short term.
After I installed my cbe, I was driving to my tuner and my CEL came on. He told me this was the result of my exhaust system and after he adjusted for the exhaust, no more CEL. You probably will not encounter overboost unless you do some type of mod that affects the intake or exhaust.

hhhmmm... now im beginning to understand why an acquaintance told me to get a manual boost controller (something like HKS' EVC) when i had a new exhaust installed.

however, i wouldnt really need a boost controller if i can re-program the ECU to compensate for the new parts, right?

[Phil 05]

Originally Posted by alfredjp

hhhmmm... now im beginning to understand why an acquaintance told me to get a manual boost controller (something like HKS' EVC) when i had a new exhaust installed.

however, i wouldnt really need a boost controller if i can re-program the ECU to compensate for the new parts, right?

Overboost can occur at any time. Are u running a turbo back exhaust w dp, or a catback? A catback should not present any tuning issues. However, a catback with no tuning isn't likely to give u much performance gain anyway. I confess to not being that familiar w the 08's but you may as well do it right and install a full TBE w dp. This will require EM such as Cobb's accessport flashed to Stage II, but at least u will be confident in knowing you are doing no harm and in the process gaining some serious power. I would not install a manual boost controler. If u are still unsure,
get thee to a reputable tuner. Good luck.