Why won't it boost beyond factory?

[Redbaboon]

Hi Lads,

I have a S1 R33 GTS-t with Greddy FMIC, Full 3'' zorst, etc etc (same old, same old). Just installed both Apexi AVC-R and S-AFC to increase boost to 11 psi and adjust mixture. The bloody thing still won't go past the factory 6.6 psi! (I did this on the dyno this morning).

I have checked the setup including solenoid, pressure sensor, but still can't go past factory boost. The factory solenoid has been disconnected. No matter what the setting in the AVC-R, it reached 6.6psi and opens the gate?

Very puzzled - a sensor check seems to reveal nothing out of the ordinary, but at 6.6psi (measured by the dyno pressure sensor) the display says around 1mmHg on the AVC-R.

Anyone seen this before, or has any idea why this is occurring? I did not get the S-AFC tuned because this would be pointless for factory boost. Thanks in advance.

[WLD747]

ive got a series 1 r33 as well with the same problem. I worked it out to be the setup of the boost controller.

usual setup

intercooler line - boost controller - wastegate. - doesnt work

new setup

intercooler line

bov return line - boost controller - wastegate - works 100%

As you can see it must be something to do with the bov return line that makes the car boost more. my car boosts to 15psi nps.

cheers

Ak

hope it helps

[Redbaboon]

usual setup

intercooler line - boost controller - wastegate. - doesnt work

new setup

intercooler line    

bov return line  - boost controller - wastegate - works 100%

Thanks for your reply AJ. Don't quite understand though. Do you mean that the factory setup is [hose from IC piping/solenoid/wastegate] and that your way is to go [hose from IC piping/bov return line/solenoid/wastegate]?

Did you have the same problem with not being able to boost beyond factory?