This maybe be a stupid question, if it is I appoligize now. I was looking at Tial's website and I noticed the springs for the 38mm and the 40mm only go to 23lbs. and the 44mm and the 46 only go to 20lbs. How would you get more then 23lbs? is there another reliable wastegate out there that can do that.

 

a boost controller, is the answer

 

^^

 

With a boost controller you should be good for about twice the spring rating.

 

when using a boost controller do you just use whatever spring comes in the wastegate?

 

if u dont use a boost controller what spring is in is the boost u should hit.

with a boost controller u can add more boost, but not take it away. so if u had a 15psi spring 15 is the lowest u could run, but u could as much as 30psi on the 15psi spring.