Chirpy Turbo Sound on Throttle Lift in Ariel Atom (Type R Engine) — How to Replicate?

[2025-Si]

Posting the question here as I understand the atom uses the Type R engine.

Starting around 10:18 in this video, when the driver lifts off the throttle, the sound seems to be different to the regular recirc noise. Does anyone know how to achieve that kind of sound? Is it an intake or something else? BOV? It sounds more chirpy than a gushing release of air.

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[optronix]

Not sure what the exact situation is here, but it sounds like an aftermarket blow off valve.

You can get much more noise from an aftermarket intake, but it still won't sound quite like that.

I thought I recalled HKS officially launching a super-sequential BOV for this platform, maybe you could look into this:

https://www.evasivemotorsports.com/...off-valve-silver-honda-civic-type-r-fl5-2023/

Here's a video for reference, not sure how relevant it is for the FL5 because the guy did a little bit of custom engineering, but there is a sound clip in there.