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Old 09-28-2020, 12:31 PM   #15
d1zguy2
 
Join Date: Aug 2020
Location: Virginia
Age: 34
Posts: 23
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Quote:
Originally Posted by Kingtal0n View Post
this is a picture of stock restrictor for sr20
https://zilvia.net/f/showpost.php?p=...0&postcount=19


however the size of restrictor depends on the flow rate of the pcv system, suction from the intake manifold and size of orifice of pcv valve.

SO if you've modified the intake, the engine, the pcv valve, anything between the intake manifold vacuum signal, the intake port, the pcv system, then the size of the restrictor will need to be adjusted to return the crankcase resting pressure to the correct range of 1-3" Hg,

Anything over 3" Hg can damage the oil pump and ruin the engine seals (engine rebuild)
so err on the large side if in doubt
Thank you for all the OG info and saved me lots of time and headaches! Replace the forward section, salvaged the restrictor from OEM hose heated up and inserted it into homedepot vynil water hose, fitted a close catchcan.

The restrict or was actually in the hose itself, the boot barb was just a fitting to allow it to take a hose into the stock rubber boot.

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