I met a guy today with an evo it had a new turbo kit on it that he said cost him 4000 dollars. When I asked him how much boost he was running he said 22psi. I am a newbie but i know with 80 dollars you can get a mbc and get the same boost on the stock turbo, so is there a point in the new turbo kit?

 

His car is tuned for pump gas. If his car was on meth or race gas obviously he would be boosting more. 22psi on the stocker won't yield the same power as 22psi on a larger turbo

 

larger turbos have can compress more air than a smaller turbo. If you think of the engine as a big air pump you will realize that when a turbo is compressing more air, the engine is getting more air, making it more efficient, making more horsepower.

 

its dosnt have to be a high boost for a bigger turbo 22psi is not like stock turbo psi

am running on my supra 0.8 bar On to4z and cams and its really fast

 

larger turbo, more volume, more air at 22psi

 

alright i get it i always thought bigger turbo meant more boost never really thought about it in volume but it makes sense now

 

PSI is the measurement of air at any instantaneous point in time. Volume of air is a rate per time. If you take the derivative of the cfm you'll get psi on the cfm curve if you graph it.