stumbling.. common problem with KA's? checkit

[RVAmm240]

So ive been looking through a bunch of these topics and it seems like a bunch of people have problems with stumbling/hesitation when either A) quickly tapping/ stepping on throttle from idle or low rpm, or B) Right after boosting at high rpm... but i havent really seen a definitive answer on what it is. Today i was talking with a tech who tuned my car before i bought it... he was explaining that the car was stumbling after boosting because of the BOV, and the KA needs a bypass valve instead to recirculate.. sooo in order to fix that, they restricted the fuel at low rpms which fixes the hesitation at high rpm after boosting, but in turn creates the stumbling when quickly stepping on the throttle.. so its basically a trade off. so im implying in order for the car to run perfectly, you gotta replace the BOV with a bypass valve?

soo does this sound plausible to anyone else? i dont have TOO much experience with this.... so whats your input?

For those who dont wanna read the long ugly, paragraph; Ultimately you need a bypass valve as opposed to blow off valve.. what do you think?

[WDRacing]

When the BOV vents it allows air the MAF has already measured to escape. A bypass valve simply vents the air to the intake pipe between the MAF and the turbo. So you avoid compressor surge but don't get the overly rich condition from running the BOV vented to the atmosphere.

Bypass valves ftw.

That help?
WD

[kentuckyslider]

or you can run your MAF meter in your charge pipe. Commonly refered to as "blow thru" maf. I would get a recir BOV. I went blow thru on my car because I had a high dolla tial BOV that you can't recirc.

[GTR PrYdE]

It's true, VTA BOV makes for shi77y driveability.

Here's my recirculated evo ix bov:


You could run it on either side though.

Blow thru works well, but I would hate to explode a plastic maf that way...

[neverlift]

mafs dont exactly explode,but they can pop the top off, nothing window weld cannot fix.
move your maf to the coldside and be done with it....