Newbie question, difference between a DV and BOV

[Rogues Gambit]

Long and short, gonna finish up the core essential mods by summer (Suspension, brakes and then a few extra bolt ons) and was wondering if the DV I got is good enough or if I should upgrade it as well

https://www.fftec.com/item/117/Synapse_Synchronic_Diverter_Valve.html

Looking for thoughts and opinions, thank you

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[Cmoney Boostang]

(Dv) Diverter valve, (BOV) Blow off Valve, as far as I know they are the samething(use to release pressure. I'm sure someone will correct me if I'm wrong.

 

[DFWStangGuy]

In my personal opinion, there is no reason to switch to a BOV over a bypass valve adapter unless you want to move the BOV to the cold side pipe with the cold side piping upgrade. I just added the C&L bypass valve adapter to mine this week and it does the same thing as a $240 BOV for $70. There is zero performance increase with either option except getting the whoosh when venting to atmosphere.

 

[Juben]

There's not a performance increase in horsepower or torque, but an aftermarket valve is definitely a performance upgrade in regards to the valve itself. The stock valve can start to open (and leak) under higher boost pressures. Plus, there's not all of the hissing and constant opening like with the factory valve.

But to answer OP's question, a diverter (or bypass) valve is the common name for a factory style compressor release valve that returns (or recirculates) the air back into the intake tract. A blow-off valve is the common name for a valve that vents to the atmosphere. Both terms are used somewhat interchangeably by most people as the function of the valve is basically the same, however, as mentioned above, a DV is most commonly a recirculating type of valve.

 

[EnFOURcer]

As stated above a Diverter valve is generally a Recirculating valve that operates very much the same as stock, and a Blow-off valve vents to atmosphere (either 100% VTA or dual port - re-circ port and VTA port both on same valve).

A key thing to note is that a Blow off valve (both full VTA and Dual Port) offer a significant increase in flow. This additional flow capability is needed when boost is turned up significantly and/or the turbo is upgraded, as the OEM DV was only designed to vent as much air as was required when the valve is operated in the stock conditions.

 

[Rogues Gambit]

Gotcha, thanks guys!

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