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Boost for 1HZ

Posted: Sun Oct 25, 2009 6:32 pm
by gqmad
Hi guys,
how much boost can a 1HZ handle and be reliable still.
Im looking at bolting on a turbo and intercooler on my 1HZ 80 series,
and would like to know if 12 psi or 15 psi is still ok for this engine.
I will be running a GT28 Disco potatoe roller turbo.