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The mkiv Supra Owners Club

Blow off valves HKS V's Blitz


lui

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What's good about the HKS is that it uses air pressure to stay closed rather than relying on a spring (afaik). Technically, I guess this means that the HKS will never leak, as it uses the spring to keep the valve open, so as long as there is air running through your pipes it will stay closed.

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  • 2 months later...
Does the blitz super sound bov sound like a recirculating valve?

 

Surj

 

A recirculating BOV is silent, as it releases the pressurised air back into the system.

 

BOV's that vent to atmosphere are the ones that make the whistle/whoosh noise, this noise will vary from model to model and boost levels.

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its a sharp high pitched chirp sound on full boost and a fluttery sound on low....quite subtle

 

See, i'm confused. Everyone says that about the HKS, and I've heard the same on a GT4 - tbh it sounded a bit embarassing.

My HKS makes a bloody great 'whoosh', no chirps at all. And I'm running stock boost. :shrug:

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