RS246.com Forum :: The World's #1 Audi R, S and RS Enthusiast Community

Interesting weekend.

My S4 previously came fitted with Bailey DumpValves and MRC changed them to 710N's.

Now usually I'm a fan of OEM and the 710N, all my motors have had them and I swear by them.
But on this occasion, going from Bailey to 710N, I noticed a significant delay before the boost came in - increased lag before the power was on tap.
Just to make sure it wasnt just me, I removed the Bosch units (checked them - all was ok) and I swapped them back for the Baileys, and low and behold, boost snapped in quicker !
Quite surprising results as I always used to think all these aftermarket DV's were just fads. But not so it seems.

Also found some interesting tests here, confirming that the Bailey snaps in quicker than the 710N: http://dv.mistertam.com/7.htm

I use the Bailey DV's, i noticed a difference from the 710N's aswell...Also never had a problem with the Bailey's in jus over 2 years (touch wood)

Looks like Bailey is a serious name to consider then!

mine has a bit of a flat spot at 3k, would that be the same sort of issue to the valves kicking in?

I think mine are on the way out they chatter and whistle and loose boost around 3000 rpm. Where can you buy the Bailey DV from?

You can try this place http://www.autoimagination.co.uk/?page= ... product=58 These are the ones i've got in silver..