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Old 09-08-2020, 08:10 AM   #1
Dustyx77
 
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The blow off valve issue

Hey guys, sooo I've bought a 200sx (eurospec) s14 that used to run on 24psi of boost, but the blow off valve, atleast according to the internet, is rated for 26psi. Sooo long story short, the car has still some major compressor surge sounds. I barely use full throttle because I use the car on the street. What kind of psi blow off valve spring would you guys suggest?
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Old 09-13-2020, 07:39 AM   #2
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If ur getting surge then the bov isnt opening or its too small.

First check your vacuum line to it. Should be a direct feed from intake manifold to the bov, not "teed" off another line.

Then make sure it acually opens, not stuck or damaged.
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Old 09-14-2020, 11:48 AM   #3
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Your bov is probably set stiff so that it only fully opens if you were at full boost, and anything under that when cruising around it just stays closed.
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