ET,

This topic has been talked about to death, if you do a search on it all will be revealed

Gethin.

 

DTA Blow-off valves can cause problems with cars running on standard management as the ecu meters the incoming air before you vent it away, thus the ecu puts in enough fuel for the air it has metered, this can cause overfuelling problems in some situations...

 

Can anyone shed any light on the relative merits and demerits between the HKS SQV and the Apex, Blitz or Spec-R equivalents? Are there any problems in running a VTA type valve?

 

I've got to agree, I've looked into buying one recently and the consensus is that they cause problems with the ECU.

Say that, the dealer who supplied my car has fitted quite a few (i.e. more than 10) HKS SQV to STi's without one single problem.
In addition to that he's fitted one to his new 22B.

If you're going to risk it, go for the HKS SQV (£250 ish).

Darren.