Post up how you installed it.

If you are getting flutter, I assume it's at partial throttle? If so, try not running the c port (the constant boost source). Or keep the c port and tighten the spring with the adjustment screw.

 

It looks like my post got deleted or something? Cause I think you're replying to me. I will post up pics tomorrow. And yes mostly part-throttle situations. Especialyl in higher gears, 1st and 2nd gear are much better then 3rd-4th-5th and 6th basically is flutter every single time no matter what, and so is 5th for the most part.

I was told you can't have C-port unconnected? I have C-port connected to my wastegate boost source, and I have A + B connected to my intake mani. B only worked better then A only but A+B seems to be the best. I have messed with the preload adjustment A ****LOAD and I did make improvements but never found a spot that eliminated it more then 50%.

Hope thats all the data you need!

 

I love my APS twin vent. Im on 27psi on E85 on stock 10.5 VIII turbo.