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Vortec27

vortech bypass adjustment

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Hi all im getting metal whistle kind of sound from bypass valve ?

I see there's a jam nut with a Allen key adjustment in the middle what I need to know is how many threads need to be showing ?

Thankw vortec27

Edited by Vortec27

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Hi chub What yours set at is how much threads showing after nut ?

il have a look tonight when im out at the garage. its never been used yet so should be the correct setting so il report back later

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Hi chub What yours set at is how much threads showing after nut ?

il have a look tonight when im out at the garage. its never been used yet so should be the correct setting so il report back later

 

Nice1 mate

 

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mine has 9 threads showing. out of interest how much does yours have? also I seen a vid on youtube of how to clean out the bypass valve so maybe that's worth a try bpv_zps8c071cdb.jpg

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Will this not be adjusted by the tuner to allow the correct air to by pass to stop any lean mix situations?

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Yea it's been mapped. I've only adjusted it because of the whistle noise was getting on my nerves wish I never touched it now :(

Edited by Vortec27

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Yea it's been mapped. I've only adjusted it because of the whistle noise was getting on my nerves wish I never touched it now :(

are you running afr gauges?

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personally I wouldn't touch it once its been set. +1 on the AFR gauges? is it running lean? are you getting any compressor surge?

 

I think he may have just buggered his tuning and possibly his engine if he drives it :wacko::scare:

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RS never touched mine as it is set from the factory, I haven't touched it either, that whistle noise is surly normal. What is your idle rpm set at? If it was really bothering you maybe enquire about getting the filter GT4ZED (Bennet) has.

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When you get off the throttle quick and all the air has nowhere to go as you have closed they bypass valve too much and it then trys to go back through the supercharger the wrong way.

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Idle set at 900 rpm.The noise was not the normal bypass swoosh jet noise it was like a metal whistle just as I hit the gas

Edited by Vortec27

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All I done is open valve a bit more Not close it . When it was mapped the valve was closed a bit more then I have it now . Might go adjust it back to how it was

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When you hit the gas full throttle the valve should fully close, so the whistle sounds like it was leaking maybe? Or not sealing properly, I thought you were talking about when stationary.

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