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How much is too much? -boost Beta i4

2K views 5 replies 3 participants last post by  427troy 
#1 ·
How much boost can a stock bottom end of a Beta 1 or Beta 2 2.0L i4 handle?
I am running 13 PSI right now, having slowly worked my way up over the course of a year. I got retarted cams, AEM FI/C, timing retard, larger injectors, bla,bla, bla, to the top end. I am wondering, has anyone put a full atmosphere to a stock bottom end? (15 PSI) ????
 
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