Misconceptions are flying around.
Remember when speaking of PSI it differs for every setup.
Example:1
My car came stock with 1.5" intercooler lines. a fairly small TB a super small intake manifold and ports, the valves were decent sized for all those things. My car handled lets say 30 psi lets say thats with my tdo6 20g turbo setup. This setup may only push 32lbs a min at max.
Since this time, my intercooler piping is now 3.5" my FMIC is now huge and 3" thick, my TB is now nearly twice the size it was, with a larger intake manifold and bigger ports, the valves have been oversized to handle the increased airflow. This setup is allowng to push 49lbs a min at the same 30 psi on the same turbo.
You can see that pressure is produced from the turbine to the valves, anything in between the two creat varaibles for the effeciency of the turbo. With my new setup i could easily run 32lbs a min a 19 psi... A bottle neck causes higher boost pressures, because the air is restricted. It's like blowing through a straw or blowing through a radiator hose, one has more velocity and one has more airflow. The more velocity creates a great deal of power and throttle response, but more air causes more fuel to burn creating a ton more power in the mid and top end with more lag.
So the breif understanding of this, may help you decide to make your piping similar to dsm's stock form, even then the F22 has a much larger TB I think, I know the H22 does, and it's intake ports and much better designed than a DSM allowing for better combustion. Thus causing a 7 psi in a f22 to outrun a dsm with the same 7 psi with all identical parts leading to the TB.
Remember when speaking of PSI it differs for every setup.
Example:1
My car came stock with 1.5" intercooler lines. a fairly small TB a super small intake manifold and ports, the valves were decent sized for all those things. My car handled lets say 30 psi lets say thats with my tdo6 20g turbo setup. This setup may only push 32lbs a min at max.
Since this time, my intercooler piping is now 3.5" my FMIC is now huge and 3" thick, my TB is now nearly twice the size it was, with a larger intake manifold and bigger ports, the valves have been oversized to handle the increased airflow. This setup is allowng to push 49lbs a min at the same 30 psi on the same turbo.
You can see that pressure is produced from the turbine to the valves, anything in between the two creat varaibles for the effeciency of the turbo. With my new setup i could easily run 32lbs a min a 19 psi... A bottle neck causes higher boost pressures, because the air is restricted. It's like blowing through a straw or blowing through a radiator hose, one has more velocity and one has more airflow. The more velocity creates a great deal of power and throttle response, but more air causes more fuel to burn creating a ton more power in the mid and top end with more lag.
So the breif understanding of this, may help you decide to make your piping similar to dsm's stock form, even then the F22 has a much larger TB I think, I know the H22 does, and it's intake ports and much better designed than a DSM allowing for better combustion. Thus causing a 7 psi in a f22 to outrun a dsm with the same 7 psi with all identical parts leading to the TB.
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