Camphasing

iTrader: (3)

BC= Bryan Crower, peak tq at around 6krpms? no adjustable cam gears,
for the mbc side port is set to WGA, bottom port to compressor housing. Nothing else is connected to these lines.
Here is scenario, driving on highway going 70 MPH, I slam 5th gear, car starts to stutter, i hear fluffing noises coming from driver side, eventually noise stops and car takes off in constant acceleration.

EVOlutionary

iTrader: (38)

It doesn't really do it "because of" or "for" the MAF sensor. This should not happen at all under WOT, but under partial throttle accelleration, yes, it is normal for the BOV to open and close. Under partial throttle there is a pressure difference between the IC pipes (pressure side of BOV) adn the intake manifold (vaccum side of BOV). Even though you are making boost there is a little pressure difference and this can cause the BOV to open and close rapidly to try to equalize this pressure difference. Usually (not always) this is not felt through the drivetrain as bucking, but if the pressure difference is great enough then you can feel the car buck back and forth.

Does this sound like what you are experiencing??

Camphasing

iTrader: (3)

yes, it does sound like what am experiencing, like the bov shuts and then the acceleration smooths out.

EVOlutionary

iTrader: (38)

Yeah, that doesn't sound right at all! That sounds like true compressor surge, but the stock turbo should never do that with your mods. You normally see that on a GT35 when you try to go full throttle at 2500 rpms. . .

Also, normal peak TQ on a stock turbo should come in between 3500 and 4500, depending on cams and dyno. 6K is WAY too high! I would really bring these issues up with your tuner. Something sounds messed up . . .

EVOlutionary

Camphasing

iTrader: (3)

dont quote me on the peak tq #s since i dont have the dyno sheet in front of me. Tomorrow, i will to by the shop and see what they think. thanks for all your imputs.