I'm running the older stlye 35mm tial wastegate and am trying to find a stiffer spring for it and was wondering if a spring from a 38mm would work.

Or if anyone has any idea on where to get a 10psi spring from let me know.

Thanks

 

yep, the boost pressure will change slightly from what the spring is rated
say you have a 15psi spring, it might make it a 13-14psi spring


all tial wastegate springs are interchangeable, but the spring pressure will change because of the valve surface size changing

 

Differences.

http://www.tialmedia.com/docum...p.pdf

http://www.tialmedia.com/docum...p.pdf