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#1 mars88star

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Posted 06 April 2019 - 01:54 PM

bought a universal ebay bov….. plumbed the damn thing in hoke up the vacuum line to the port closest to the firewall and nothing no noise at all....anyone have this issue before?





#2 87redcat

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Posted 06 April 2019 - 03:57 PM

Is it adjustable??
I got blisters on my fingers!!!

#3 mars88star

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Posted 06 April 2019 - 06:14 PM

yes.....is it the harder the louder or softer for louder

#4 Preludedude

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Posted 06 April 2019 - 08:12 PM

View Postmars88star, on 06 April 2019 - 06:14 PM, said:

yes.....is it the harder the louder or softer for louder

Is it releasing any air at all?    Even at idle, when your rev it, is it opening any?

You seem to be stuck on noise.  You buy it to make noise? Or to protect your compressor from surge? :)

#5 mars88star

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Posted 07 April 2019 - 10:59 PM

bought it for both.....mine was a greddy knock off after doing some research and watching videos found that those never work properly out of the box,there is a spring mod on those where you take the small spring out and then it works fine....I also used the port under the 3 ports on the throttle body not the one closest to the firewall that port seems to work better for me at least

#6 tux

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Posted 08 April 2019 - 12:29 PM

knock off parts are sketchy

#7 Turbo Cary

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Posted 09 April 2019 - 06:16 PM

When you remove the smaller spring you are removing tension against the plunger which keeps the BOV shut. The proper adjustment procedure is to hook the valve to full time vacuum (the lowest port on the intake manifold below the throttle body) and then with the engine running loosen the adjustment shaft until it begins to open at idle. Then tighten the shaft one full turn back and lock it down.

With a spring removed you risk the valve opening under boost which changes it from a blow off valve to a pop off valve. Old Z31 (84-89) 300zx's had a pop off valve. Essentially when boost pressure overcame spring pressure it would open and flutter under boost to protect the engine.

#8 mars88star

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Posted 12 April 2019 - 05:26 PM

nice....thank you for the information





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