I have an N42 block with dished pistons, N47 head, 38mm Tial wastegate, Megasquirt, 550cc injectors, and a GT3076R .64 turbo ready to go on my car. From what I am reading on this site, the N47 is not a good head to run boost on so I am planning on running 5psi until I can find a P90 head. I have purchased a cheap manual boost controller but I do not know what spring I need for the wastegate. This car is street driven and will never see the track. I eventually would like to see 15psi.
Can anyone recommend a specific spring that I need for my setup? I am super confused as to what spring to get in conjunction with a manual boost controller.
Edited by dpuma8, 12 April 2016 - 03:28 PM.