Greddy Profec B-Spec-2 EBC Question

[98mitsubishigst]

Hey guys- I been reading up on how to use this boost controller. Honestly, I know the basics but I was just tuned to 20psi, but because of a boost leak that we couldn't fix we had to stop for the day.

We were doing pulls and messing with the boost controller not knowing anything about this garbage (it came with the car, not my first choice although people love this thing).

Say I want to run 24psi- what should my set % be at? 60ish%?

Also what should the gain be around? Should I just watch for boost spike and go down a few percents?


This is the controller I have:

Greddy PRofec B-Spec-2 Boost Controller

 

[Black-Out]

Profec B spec 2 is a great boost controller but the duty cycle percentage required to get to your desired boost level will purely depend on what wastegate you have in your car and what spring is the base pressure setting,as well as what your gain is set to ......if the gain isn't set right you could spike much higher than what you want to hold or you could spike to what you want to hold but actually fall off below that 20psi your wanting.....

Bump the actual setting in 2% increments and do a 3rd or 4rth gear pull to verify if you've hit the pressure you want.....set it up so that 20psi is on your high map and say 15psi is your low map...as long as high is set up to your maximum pressure you want to run the actual control soleniod will make sure you spool more before the wastegate is opened otherwise if you set your max pressure on the low map you may experiance a slower boost responce time ......

You also need to keep after how much spike you end up with, if it spikes to your pressure then falls off then you need to up your gain setting.....if it spikes over the maximum boost pressure then settles back to what you want then you need to back off the gain so that it goes to or just barely over your desired boost setting and pretty much stays there....just remeber that if your in a cold climate you may have to change both of these settings if the temp drops off severely ( I notice these things can creep if your running an internally gated turbo and the weather gets down around 30-40 degrees...)
hope that helps out......