Kane

Is there any difference in the OEM dump valve and an uprated one like bailey/blitz/HKS etc,etc???

Interested in the performance improvement side????

Kane

Do Dump valves like HKS/Blitz/bailey help reduce lag?

ScoobyKev

All the dump valves do (from what I've been told) is it increases the life of the turbo. It releases the pressure with in the system when off throttle, hence the woosh...Its no performance mod, hope this helps

Kev

nom

...but there is the question of how well it releases the pressure.
There can be a noticeable improvement - use a 'quality' DV, then switch back to the standard one & try an overtake involving a gearchange - it's bloody scary. The power you've become used to after a gearchange has just disappeared & you find yourself on the wrong sde of the road with no apparent acceleration...
But not everyone seems to notice this, so it might just be me. Hey-ho

Judge

Agree with Nom on that point but the difference is not that great.I think when you are talking about HKS and Blitz money it would be better spent elsewhere if performance is the only goal.If most folk are honest (Me included) dump valves are bought for the noise and the cosmetic improvement to the engine bay!

nom

Certianly it's not a 'measureable' performance upgrade, just like e.g. switching to coilovers, but I found it does make quite a difference. Although it can't be proved, no
I just find I don't like driving the car with the standard DV now.

JohnCL

Any one know the price differences between a new standard DV and others. I would be going for re circulating one, not to atmosphere. I know I can get a second hand OEM one from Glenburgie Cars for around £25