Unable to get more than 10-11 psi

RotaryBuddha · 06-15-2009, 05:14 PM

My AVC-R was installed basically following these guidelines

http://www.fd3s.net/avc-r_install.html

I am stumped here. And don't know exactly what to search for. This happens in both sequential and non-sequential mode. I can't find any boost leak. It will hold boost just fine but won't build anymore than 10-11 psi. Everything is tight as can be. I have a AVC-R setup for .95 with 50% duty cycle. If I set the duty cycle lower than that the boost will modulate during the same gear, a good 2 psi. If I raise the duty cycle to 60-70% I will see a very brief spike of 12-13 but it will immediately drop back down to 10-11. If I shut off my AVC-R I get a solid 7 psi all the way to redline. I tired also using the solenoid from another AVC-R that I knew that worked and still the same problem. So I don't think its the AVC-R.

During pulls the car does not smoke. So I don't think the turbos are shot. But I am not sure. What are the symptoms of tired turbos?

Also side note the waste gate was supposedly ported by the previous owner. So I don't know if something has gone wrong with the flapper.

06-15-2009, 05:14 PM	#1
RotaryBuddha The Newbie Join Date: Feb 2008 Location: Tampa FL Posts: 29 Rep Power: 0	Unable to get more than 10-11 psi My AVC-R was installed basically following these guidelines http://www.fd3s.net/avc-r_install.html I am stumped here. And don't know exactly what to search for. This happens in both sequential and non-sequential mode. I can't find any boost leak. It will hold boost just fine but won't build anymore than 10-11 psi. Everything is tight as can be. I have a AVC-R setup for .95 with 50% duty cycle. If I set the duty cycle lower than that the boost will modulate during the same gear, a good 2 psi. If I raise the duty cycle to 60-70% I will see a very brief spike of 12-13 but it will immediately drop back down to 10-11. If I shut off my AVC-R I get a solid 7 psi all the way to redline. I tired also using the solenoid from another AVC-R that I knew that worked and still the same problem. So I don't think its the AVC-R. During pulls the car does not smoke. So I don't think the turbos are shot. But I am not sure. What are the symptoms of tired turbos? Also side note the waste gate was supposedly ported by the previous owner. So I don't know if something has gone wrong with the flapper.