Hello i have an S2 from 1986. The car has a lpg equipment and works very well on standard boost ( 0,7 bar). I want to increase the boost pressure up to 1,0 bar ( 14 psi), and I know I can do it without having the LPG many problems because the octane number is higher. There 's a way to increase the pressure without reprogrammed ECU? If i act on the solenoid (amal valve) ,i have a chance to increase boost?