Had an interesting discussion today in class about readings I was getting from my boost gauge. Now before today I always assumed that when my boost gauge said 26psi it meant 26psi considering I was measuring directly from the intake manifold. My teacher brought up an interesting point (he's a performance course teacher), he said that the turbo will create back pressure causing the back pressure to go back into the cylinders and then into the Intake manifold causing false boost readings. He claimed the only way to read true boost would be to have a gauge reading back pressure then to subtract that number from manifold pressure and thats your true boost readings. Does this sound right to you turbo guys?

P.S. i was boosting 26psi on my mitsu race engine not the del sol