hmmm, personally, i wouldn't run more than 8psi on stock internals. once you hit 8psi the first time you'll be happy......for a while. technically you shouldn't be able to run 8psi on our internals, but between the compression ratio and good tuning you can sneak away with it. the few people i've personally known to bring up the boost wound up with blown motors after a short while. i'm sure there's guys running 16psi all day on their stock 4g64s though....
and a 14b or small 16g is perfect for our motors. 14b hits boost at the perfect moment in the turbo I4s i've been in
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