2009 CTS-V 427lsx TT 6266's
Good dedication and tuning for sure 
02-27-2014, 03:04 PM
#96
9 Second Club
What boost is it actually making ?
With 18psi springs, is the actual controller doing anything yet ? If controller duty is less than around 10% pretty much nothing will be happening from a control point of view anyway, just down to the actual solenoids themselves, as most dont really start bleeding off any air until around 10% duty
If the controller is trying to maintain the 18psi from a lower gate setting, and duty is over 10% throughout and was tailing off, you could try raising the sensitivity to make it hold at higher rpm's.
Or if you have an rpm signal fed to the EBoost, they seem to have a specific COr boost correction feature where you can dial in where boost starts to tail off and increase solenoid duty to compensate. Page 29 of the manual.
Also how the gate is plumbed will depend how well the controller will work for various setups depending on backpressure etc
If it was a leak it would need to be massive, because by nature even if there is a leak, because the control signal sees the boost drop, it would automatically try and work the turbos harder via closing the gates to increase boost.
So it's either backpressure blowing the gates open, or the turbo's simply struggling a little at the top end.
Both can be compensated for via a controller, but there will be a point where no amount of messing about with the gates will resolve it, a different mechanical setup is needed.
With 18psi springs, is the actual controller doing anything yet ? If controller duty is less than around 10% pretty much nothing will be happening from a control point of view anyway, just down to the actual solenoids themselves, as most dont really start bleeding off any air until around 10% duty
If the controller is trying to maintain the 18psi from a lower gate setting, and duty is over 10% throughout and was tailing off, you could try raising the sensitivity to make it hold at higher rpm's.
Or if you have an rpm signal fed to the EBoost, they seem to have a specific COr boost correction feature where you can dial in where boost starts to tail off and increase solenoid duty to compensate. Page 29 of the manual.
Also how the gate is plumbed will depend how well the controller will work for various setups depending on backpressure etc
If it was a leak it would need to be massive, because by nature even if there is a leak, because the control signal sees the boost drop, it would automatically try and work the turbos harder via closing the gates to increase boost.
So it's either backpressure blowing the gates open, or the turbo's simply struggling a little at the top end.
Both can be compensated for via a controller, but there will be a point where no amount of messing about with the gates will resolve it, a different mechanical setup is needed.
10-17-2014, 09:12 AM
#99
Update?
Put the 4L80E and needed to refabricate the passenger side due to the bell housing and said screw it and sold that whole TT setup and building another TT setup using Comp 6767's and a A2W setup. Fabrication is slow as I'm using a friend type deal. But turbo's are all fitted up, Heat exchanger is completed, A2W intercooler is started and tacked up. Intake tube is all tacked up and ready. Its progress but slow at the moment but that's how friend deals work I guess 😢
You can see updates and pictures here! https://www.facebook.com/NSANETTV
Put the 4L80E and needed to refabricate the passenger side due to the bell housing and said screw it and sold that whole TT setup and building another TT setup using Comp 6767's and a A2W setup. Fabrication is slow as I'm using a friend type deal. But turbo's are all fitted up, Heat exchanger is completed, A2W intercooler is started and tacked up. Intake tube is all tacked up and ready. Its progress but slow at the moment but that's how friend deals work I guess 😢
You can see updates and pictures here! https://www.facebook.com/NSANETTV
