How much boost will this combo make

[Gremlinsteve]

I currently run a phase 2 roush setup
If I was to swap to a 15 percent od pully
And drop down to a 69 mm blower pully
What realistic number will this make psi
Wise

Also. If I was to keep the current 80mm
Pully what will it make?

Can someone comment on this

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[cdmustang2016]

I currently run a phase 2 roush setup
If I was to swap to a 15 percent od pully
And drop down to a 69 mm blower pully
What realistic number will this make psi
Wise

Also. If I was to keep the current 80mm
Pully what will it make?

Can someone comment on this

Go to the VMP web site and they will tell you pulley size and what PSI it will make with either enclosed or open airbox.

 

[pwnall1337]

Go to the VMP web site and they will tell you pulley size and what PSI it will make with either enclosed or open airbox.

he mentioned an over drive pulley as well so it will not be spot on. Also rpm will make a boost difference as well. Someone who shifts @6800 rpm and someone who shifts are @7900 rpm will not have the same boost level.

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