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BOV installation. Before or after the tune

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Old Feb 24, 2011, 02:01 PM
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Question BOV installation. Before or after the tune

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!
Old Feb 24, 2011, 07:46 PM
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ttttt
Old Feb 24, 2011, 08:37 PM
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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.
Old Feb 25, 2011, 07:15 AM
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Originally Posted by F0RSAKEN
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...
Old Feb 25, 2011, 07:16 AM
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Originally Posted by bnr34rb26dett
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!
because it's not blasting to atmosphere - get the spring pressure rated for one under what your current vacuum level is
Old Feb 25, 2011, 06:42 PM
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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.
Old Feb 27, 2011, 06:17 AM
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Before

Before the tune because you probably don't want anything to just change.
Old Feb 27, 2011, 07:58 AM
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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.
Old Feb 27, 2011, 08:18 AM
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any sound change noticed or do all recirculated bovs sound the same.
Old Feb 27, 2011, 10:45 AM
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Originally Posted by TiALSport
QR is full recirculation...
Whoops my bad :-/
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