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Discussion Starter · #1 ·
Since fitting a fmic ive been having a lot of problems with boost spiking.

Now from conversations with various tuners im fairly certain the cure lies within the settings of my GReddy PRofec B-Spec2 controller.

But no matter how i seem to have the settings i cant eradicate the spike (except in 2nd gear).

I'm aiming to run 0.8 bar so wondered what settings everyone else is running and whether other people with this controller and a fmic have had problems with spiking.
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