Best BOV for VF620 kit

my_e92_is_blue · 09-26-2018, 01:41 AM

I have a VF620 kit on my M3 and I don't get that "woosh" from the BOV like I want. I'm assuming I need to change the spring but im not sure on what spring rate to go with. Can anyone give me a suggestion and a possible sound clip of their BOV and spring rate? I'm assuming a Tial BOV is the way to go but any suggestions would be awesome

Biirdman50 · 09-26-2018, 07:14 AM

Tial Q BOV, with a -2psi spring and the Greddy style flange and you are good.

MidnightM3 · 09-26-2018, 01:22 PM

Quote:

Originally Posted by Biirdman50

Tial Q BOV, with a -2psi spring and the Greddy style flange and you are good.

There is a video on YouTube of an e92 M3 owner who had a Tial BOV that was hitting his hood so he swapped it out for the Vortech Race BOV and got better clearance. See video linked below.

azndrunk74 · 09-27-2018, 12:55 AM

I really liked my vortech bov. Mine is anodized black and for sale if you want it.

my_e92_is_blue · 09-27-2018, 01:23 AM

Quote:

Originally Posted by azndrunk74

I really liked my vortech bov. Mine is anodized black and for sale if you want it.

how much do you want for it? did you need an adapter plate/flange to mock it up?

azndrunk74 · 09-27-2018, 03:59 AM

Quote:

Originally Posted by my_e92_is_blue

how much do you want for it? did you need an adapter plate/flange to mock it up?

$250 shipped. Direct bolt on for both Ess and VF manifolds. My buddy and I had the same bov in diff colors for each kit.

Biirdman50 · 09-27-2018, 04:30 AM

Yeah same setup for both bov. Super easy install. Direct bolt on. Love the sound. Makes shifting that much better!

bvrider1 · 09-27-2018, 04:52 AM

Can you really tell if it holds the boost better in between shifts better than the standard max flow?

Biirdman50 · 09-27-2018, 05:41 AM

Quote:

Originally Posted by MidnightM3

There is a video on YouTube of an e92 M3 owner who had a Tial BOV that was hitting his hood so he swapped it out for the Vortech Race BOV and got better clearance. See video linked below.

That's weird. I don't know how to post my video on this site but I have plenty of clearance as well as some of my other buddies who have the tial. Maybe his manifold is sitting higher

Biirdman50 · 09-27-2018, 05:44 AM

Quote:

Originally Posted by bvrider1

Can you really tell if it holds the boost better in between shifts better than the standard max flow?

I don't know if it necessarily holds more boost. I think it's just for the noise effect. Air is always flowing even mid shift. It's only when he really rip it and back off when air makes a huge blowoff sound. My car is a weekend driver only so I don't mind the constant air flow sound

takrdown · 11-04-2019, 10:44 AM

Sorry to bring this thread back from the dead but had a question as to the difference between the Tial with a -2 in vacuum spring (that everyone seems to recommend) and the Vortech with the -17" vacuum (that everyone else seems to recommend).

I just installed the Vortech and I really love the sound when letting off a shift, but when cruising and not much gas on I get a bit of a quiet woosh as the valve is opening a little. I would say that's happening around -6" of vacuum to full open.

I'm wondering if I traded it out for the Tial with the -2" vacuum spring it would be much worse or better. Can't wrap my head around it....think because it's he first Monday after DST.

BTW, I have a VF 620 kit if that maters to anyone talking specifics.

How much different will they sound and act?

09-26-2018, 01:41 AM	#1
my_e92_is_blue Lieutenant 45 Rep 450 Posts Drives: 2008 M3 Join Date: Jan 2016 Location: Washington iTrader: (2)	Best BOV for VF620 kit I have a VF620 kit on my M3 and I don't get that "woosh" from the BOV like I want. I'm assuming I need to change the spring but im not sure on what spring rate to go with. Can anyone give me a suggestion and a possible sound clip of their BOV and spring rate? I'm assuming a Tial BOV is the way to go but any suggestions would be awesome
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09-26-2018, 07:14 AM	#2
Biirdman50 Private First Class 16 Rep 120 Posts Drives: 2008 E90 M3 Join Date: Jan 2016 Location: CT iTrader: (0)	Tial Q BOV, with a -2psi spring and the Greddy style flange and you are good.
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09-27-2018, 12:55 AM	#4
azndrunk74 Major 612 Rep 1,326 Posts Drives: Frozen Black F10 M5 Join Date: Nov 2012 Location: Bay Area, CA iTrader: (13)	I really liked my vortech bov. Mine is anodized black and for sale if you want it.
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09-27-2018, 04:30 AM	#7
Biirdman50 Private First Class 16 Rep 120 Posts Drives: 2008 E90 M3 Join Date: Jan 2016 Location: CT iTrader: (0)	Yeah same setup for both bov. Super easy install. Direct bolt on. Love the sound. Makes shifting that much better!
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09-27-2018, 04:52 AM	#8
bvrider1 Captain 344 Rep 790 Posts Drives: e90 m3 + f80 zcp Join Date: May 2016 Location: 3rdCoast iTrader: (4)	Can you really tell if it holds the boost better in between shifts better than the standard max flow?
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11-04-2019, 10:44 AM	#11
takrdown Other car was a submarine 94 Rep 704 Posts Drives: i4M50 (waiting), 2013 R56 JCW Join Date: Oct 2007 Location: Central CT iTrader: (7)	Sorry to bring this thread back from the dead but had a question as to the difference between the Tial with a -2 in vacuum spring (that everyone seems to recommend) and the Vortech with the -17" vacuum (that everyone else seems to recommend). I just installed the Vortech and I really love the sound when letting off a shift, but when cruising and not much gas on I get a bit of a quiet woosh as the valve is opening a little. I would say that's happening around -6" of vacuum to full open. I'm wondering if I traded it out for the Tial with the -2" vacuum spring it would be much worse or better. Can't wrap my head around it....think because it's he first Monday after DST. BTW, I have a VF 620 kit if that maters to anyone talking specifics. How much different will they sound and act?
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