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The stock S13 SR breather setup (especially if lacking the charcoal canister at the back of the head) is terrible, to say the least.
That may be part of your problem.
I added a port at the rear where the charcoal canister used to sit then ran the block breather to that port. I then tapped the middle port and ran that to a baffled can. Then I ran a vacuum source to my compressor inlet pipe.
Blow by in the induction piping has been kept to minimum with that setup. The setup is VERY simlar to the S14 setup.
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