17psi
0.9bar
If you intend to raise boost to about 1.2 bar (generally recognised as the maximum safe boost) you will need a fuel cut defender.
12 psi in both ranges
i hear with a propper tune with a stock turbo on a 2.5 sti the highest safe boost is 23 psi
8psi
i had a similar issue with my ej20t my standard boost solonoid was stuffed plus i replaced with new plugs ngk iridium and possible fuel cut maybe needed hope this helps Put a subaru thermostat in it. Aftermarket ones will give this problem. Makes them run to hot!
seems common problem. all you need do is clean the boost solinoild with a sqert of brake cleaner. if you connect he two green conecter wire together under the stering collum above the pedals turn the ignition on. ( do not start) you will here the solinolid tikking and tapping take the middle pipe off and give it a good squirt. then remember to disconnct the wires. regaurds snoop
Boost is positive pressure in the manifold, so you only see boost when you give the gas pedal heavy load. The best way to check the boost pressure is to connect a vacuum hose to a boost gauge. This will tell you the exact boost pressure when you are in wide open throttle.
boost pressure, as you call it, will not show on gauge,if you have one, while engine is at idle the turbo pressure does not boost but runs all the time according to the revs of engine
Boost pressure is the amount of pressure above normal atmospheric pressure the turbo/supercharger is producing. Can be expressed in PSI (US used) or BAR (mainly outside the US). BAR = (boost pressure) * 14.7 (atmospheric pressure) / 14.7 (atmospheric pressure), an example 8psi of boost equals: 14.7+8/14.7 = 1.54bar
A boost gauge in an internal combustion engine has the role of a pressure gauge. The gauge indicates the manifold's air pressure or a turbocharger or supercharger's boost pressure.
boost is pressure. units of pressure is pounds per square inch(psi), atmospheres (bar), and kilo pascals (kpa)