I was wonder what effect the springs have on the boots level. In jeffs post about his b20 at the track he said he is running 13 psi with a 6 psi spring how is that possible and how do you adjust boost on a external wg

 

its called a boost controler. you put it in line to the wastegate and it either obstructs teh flow slightly or bleeds off some pressure making the WG think its still getting 6psi...