so i have a FP black going in soon and i am thinking of getting the tial qr to go with it.
I understand that i will be selecting the spring rate depending on the engine vacuum. so here is my question

1. would my engine vacuum change with a new turbo setup?
2. should i wait until i get fp black installed, read the vacuum, then buy the BOV?
3. does it really matter if i tune the car before or after BOV installation if my stock DV isnt leaking?
thanks!

 

ttttt

 

The only thing that really controls vacuum would be cams/compression, so a turbo change wont change a thing.

Get the BOV if you want, bearing in mind that you don't want a TiAl if you are running a MAF tune, you'll want something that recirculates, like a Synapse.

It will matter once the Black is on, because I assume you will run more boost, and depending how far you go, the stock DV probably wont hold. I think the IX DV is tested to work to 28-30psi, so over that, you'll probably leak, and lose power.

 

QR is full recirculation...

 

because it's not blasting to atmosphere - get the spring pressure rated for one under what your current vacuum level is

 

I would personally install a new DV before your tune.

You have a Black, so I assume you are going high PSI.

Even though it seems as if your OEM DV does not leak. I would put money on it that as you get to operating temp, it will be bypassing boost.

I got tuned with a Turbosmart. It held boost great.
I could not stand the constant fluttering, so I went with a IX DV. I can definitely feel the reduction in power.

 

Before the tune because you probably don't want anything to just change.

 

deff get it before the tune. I swapped out my bov after a tune and i had a leaky bov before hand and didn't know it. The tune did change a bit

if you have enough room in the engine bay get the synapse bov... one of the best mods ive done.

 

any sound change noticed or do all recirculated bovs sound the same.

 

Whoops my bad :-/