1 dump valve or 2?

[rx7aberdeen]

was having a look in the engine bay the other day having a close look at the blitz dump valve, looked further back and realized there is still a standard dump valve on the other induction kit? any one know if i should replace this dumpvalve with an aftermarket one or should i leave it as it is!

[J4P RX]

Its not the same.  The 2nd one is a Charge Relief Valve which controls pre-spool on the 2nd turbo.  I would advise leaving it there, from my non-techy understanding of these things.  

Lee

[88GT-R]

Hi,
If it is black, with the vaccum hose coming off it, you are probably looking at the std bov. Best bet would be to put up a pic.
There is no need for both, and it was probably left in as a blank on the filter.

John

[tr8theshape]

Mine currently has just the one BOV (HKS) attached directly to the turbos with a braided hose and everything else is blanked off.

I understand that this is not the way that it is usually done and am considering getting it put back to nearer stock with the stock piping and additional stock BOV.

It does seem to go OK at the moment though but just concerned that it is not right.