Unable to get more than 10-11 psi

[RotaryBuddha]

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.

[ZachFD]

Originally Posted by RotaryBuddha

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.

make sure the vac lines going to the charge relief valve are set right. I recently ported my wastegate and had the charge relief valve and the rear cross over pipe nipple hoses swapped. The car wouldn't boost past 6psi and boosted very slow....all the air was coming out of the charge relief I assume. Swapped it back and worked fine.