I was going to order my tial blow off valve today and ran into a situation....which spring should i order? I searched but couldnt find any feedback on the topic at all. I plan on running 9-15 psi so which spring would best suit my needs, and how big of a difference will it make if i boost under what the spring was designed for, or over?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Devine &raquo;</TD></TR><TR><TD CLASS="quote">I was going to order my tial blow off valve today and ran into a situation....which spring should i order? I searched but couldnt find any feedback on the topic at all. I plan on running 9-15 psi so which spring would best suit my needs, and how big of a difference will it make if i boost under what the spring was designed for, or over? </TD></TR></TABLE>

Are you talking about a BOV or a wastegate? Just use the stock Tial BOV spring, Which BOV are you trying to get? The 50mm one??

 

The website I was browsing(already forgot the name) offered 3(i think) different springs for the Tial blow off valve, and they were of various stiffness. Almost like the springs in a wastegate. What I don't understand is that if the Blow off valve's valve is actuated by the pressure inside the intake manifold than why is a spring of different stiffness needed, is it possible that these springs are for if you're not running a vacuum/pressure line to your intake manifold?