Sorry if this has been covered before but I have looked and didn't see anything. I have the on3 cold/hotside with dual waste gates and a 7675 precision turbo. I will have 2 different tunes. one for 91 octane and one for e85. What is a good boost level for 91 octane? with the psi level for 91 octane lets say 13psi do I put a 13psi spring in each wastegate? I would like to only put the 13 psi spring in each wastegate then use my manual boost controller to up the boost when switching to e85.