I know the boost goes up with Rev's, if i upgrade to a smaller pulley which is either 1 or 2 psi more will it just bit 1 psi at each interval more or does it not work like that? e.g

previous

3k 2 psi
4k 3 psi
5k 4 psi
6k 5
7k 6
8k 7
9k 8

But after a smaller pulley what does it change to, just 1 more psi at each stage?

Thanks

 

The max psi per pulley is at redline. It will be much less of a boost gain lower down in the rpms. To get significantly higher psi mid range etc you would have to make a big jump up in boost.

 

It's very linear. 2 psi at 9000 rpm would be 1 psi at about 4500, 0.6 psi at 3000 rpm.