How do the aftermarket options compare to stock??

 

i was told only important for higher boost applications

 

yes im boosting almost 1.6 bar..

 

had the Agency Power ones on my car for a month, (got them for free from a friend) brand new in box and I at first thought it was beneficial, because the boost seemed to stay up when i was shifting, but i ended up doing a readout of my computer and found that i had a boost leak.... I thought it was something else at first but then I decided to put back the oem brv's recheck the code and it was gone... so my observation is that the AP brv's caused a boost leak, no issue since.

That doesnt mean that other BRV's dont have good results, just didnt have good results with these.

Hope that helps

 

Simply holding higher boost pressure, without leaking out!

 

Had the exact same problem with my AP, Worst investment in my life. Oh well there in the garbage now.

 

i've felt the different !
when changing gears slow you'll lose the boost pressure quick with the BOV's it will keep the boost pressure longer when you shift you dont need to boost up from zero there will still be spool in them
when quick shifting you'll see the bar goes down slightly hope this helps

 

Which brand did you use?? and did it improve acceleration numbers?

 

I have the EVOMS ones, no problems.

 

i used evoms BOV's and it really did u can feel the slight different they're cheap and worth every penny no data log sorry !

 

DITTO! AP NO GOOD

 

i never had any problems with the evoms bovs and i have a friend had problems with the agency bovs as well !

 

It seems to me that the stock diverters, being a diaphram design, would react more quickly to the closed throttle plate than the aftermarket piston design diverter valves.