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Turbosmart Blow Off Valves Thread


urslow

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  • 6 months later...
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  • Member For: 12y 2m 6d
  • Gender: Male
  • Location: Melbourne, South East.

I have recently installed a turbosmart kompact dual port blow off valve on my car.

I have made it full atmospheric. My car is running 20 PSI.

I have two questions:

1. Under lower boost levels eg < 8 PSI, I will get the turbo surge/flutter sound, anything above that will get the bov sound. Is this normal or should I adjust? If so tighter or more loose? currently have 4 shims.

2. Also wanting to know, is it possible for the bov to leak of make the car lose power? And if so, would this be caused by the BOV being adjusted too tightly or too lose?

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  • Member For: 14y 9m 21d
  • Gender: Male
  • Location: Christchurch, New Zealand

If you have it too loose I pretty sure it will open under boost and bleed off some of that pressure. Of course this would probably show up on a boost gauge if fitted.

As long as your not losing boost then you could loosen it a bit, but whats happening now isn't really an issue.

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  • Member For: 12y 2m 6d
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  • Location: Melbourne, South East.

if you lose boost how do u know if its BOV or valve springs?

Just wanting to know if it is possible.

If you have it too loose I pretty sure it will open under boost and bleed off some of that pressure. Of course this would probably show up on a boost gauge if fitted.

As long as your not losing boost then you could loosen it a bit, but whats happening now isn't really an issue.

I do have a boost gauge connected.

I never would have thought it would be this hard to adjust a bov. Just about ready to throw it in the bin.

As per the instructions, I've adjusted it so that the piston is not open during idle.

Is this the correct way to adjust them or is it OK if they are open on idle.

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  • Member For: 14y 9m 21d
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  • Location: Christchurch, New Zealand

If valve springs you'd have other running issues, like rough running after boost.

As the instructions say closed for idle, otherwise your already leaking air out straight away before even on boost.

As said though, if too loose you'll have it leak out when accelerating.

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