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Help-bov Issue

MRGTR911

By MRGTR911,
in General Automotive Discussion

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MRGTR911 Experienced

MRGTR911

Posted
Posted

Hi guys,

My lil bro just installed a Tomei BOV in his evo after previously having no BOV. Previously he had a compressor surge noise which is the loud flutter.

He installed the BOV and it plums backs into the intake system. He was expecting it to sound stock however it is still making the loud flutter on all boost levels and RPM ...

Any idea as to what could be the issue ? The BOV is brand new from the package.

Thanks

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Turbz RB-25 Experienced

Turbz RB-25

Posted
Posted
sounds about right to me.

my mate has a hks super seqential and it still chu chu's

Fail...

It should NOT "chu chu" assuming you've set the correct spring tension on the BOV.

1. Ensure that there is vaccum on the hose connecting to the BOV while running, maybe you've installed a line that has no vaccum.

2. Play around with the spring tension to make it soft enough to avoid compression surge, but hard enough so it doesn't leak.

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Turbz RB-25 Experienced

Turbz RB-25

Posted
Posted

Is it far away from the TB?

Usually the BOV should be installed 30cm away from the trottle body to ensure optimal performance.

If it's closer to the turbo side, there will be some compression surge.

Have you tried loosening the tension in the spring?

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MRGTR911 Experienced

MRGTR911

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Posted

after closer inspection, he noticed the lil hose that connects to top of Bov didnt lead anywhere. It was supposed to run into the intake manifold.

Car sounds and goes better now. nicer to drive after gear changed and has a small "chu" after acceleration.

so turbz-rb25 was right . "1. Ensure that there is vaccum on the hose connecting to the BOV while running, maybe you've installed a line that has no vaccum."

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