Dump Valves

[fletch]

Hi guys

Ive purchased two bailey dump valves for my fd and fitted them to my standard engine. I have the orginal air box etc.

The problem i have is that the second dump valve does not seem to be working, ie i cant hear it!

Any ideas please as to what this could be?

Thanks

Fletch

[MillSpeed]

The FD only has one conventional dump valve (that makes the characteristic woosh you\'re listening out for). The other one is a charge relief valve that vents boost pressure produced by the secondary turbo during pre-spool.

[LRP]

fit the original relief valve  back on its the one towards the rear!

[DC-TYPER]

did you do a straight swap? do you have pics of what you have done?
the one closest to the air box is the dump valve

[fletch]

thanks guys, but why fit the relief valve back on?

[fletch]

donta have pics, just fitted them as instructions indicated!

[prince_of_tokyo]

got the same prob, fitted two blitz units but didnt make sound louder...instead causes turbo stall as i guess the second bov is not adjusted properly...im gonna put my original denso recirculating unit back on...

[prince_of_tokyo]

btw, is there any diff between the two original denso recirculating units on a standard car?

[Jono FD3]

Only one of the denso units is a dump valve / BOV, this is the one closest to the air box, the second one is something to do with the prespool on the second turbo, this is a vent which releases the pressure generated by the second turbo before the butterfly opens at 4500rpm allowing the boost from both turbos in to the plenum!!

Jono