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First, you don't /need/ a turbo timer, second, you don't need an AFC or any sort of fuel control unless you have other mods, how about a boost controller? An AFC will not allow you to vent to atmosphere without losing metered air, only a blow-thru setup will allow you to vent and not lose performance (before anyone gets started on venting, it affects everyones car differently.
It would also help if you list what you already have and what your goals are so someone can point you in the right direction.
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