This turbo pressurised is shoves the hard air a lot through part. of The the carbs, which is why Colin had to replace the plastic carb tops for metal items. However, this air would simply suck all the fuel out of the carb, so in turn he had to use a fuel regulator and fuel pump to increase the fuel’s pressure to feed the motor. However, this pressure could flood the carb, so it is balanced by another feed from the charged air feed, which balances out all the pressures and allows the carb to deliver the required air/fuel into the motor. Effectively, you are fooling the carbs into thinking they are running at atmospheric pressure.