I have a the same sort of thing , i have a double decat ,nur spec , fuel pump ,front mount , bov valve , boost controller , induction kit , fuel cut defender ,
The car was all done when i got the car and the boost controller was already set up ,
In 3rd and 4th gear hard pulls it makes spikes at 1.15 bar and holds 1.03 bar in 3rd and 1.05 bar in 4th in 5th and 6th im only holding just under 1 bar. the boost controller is on max .
i know the car can make more as i have a pipe come off the boost controller one day and the car fit 1.8 bar , i let straight off as i know there was something wrong plus i had fuel cut ,
So why will the car not make and hold 1.2 bar , its been driving me mad for months .
The car is a j spec tt 6 manual there is a rr ring fitted but im not sure what size , i have brought a 1.2 bar ring to put in a try .
Rich.