HKS BOV Springs

Shieldze1025 · 10-14-2010, 05:08 AM

Hey guys,

I've done a lot of searching and can't find any details on anyone changing the springs in their BOV. They sell different springs for just about every BOV for different pressures, but I haven't seen anyone with an N54 doing it.

I have seen that with the HKS SSQV BOV on my car, it is only noticeable if I hit about 4500 RPMs or higher. My question is, has anyone changed the springs on their BOV? I am just wondering if it is possible to get a spring that releases at a lower PSI.

Negative comments not needed. TIA.

Ghines1279 · 10-14-2010, 05:54 AM

do you have a boost gauge? maybe your not making boost till then.

triggz · 10-14-2010, 08:05 AM

I think you have a boost leak. I notice my hks bov as little as 1500rpm.

Shieldze1025 · 10-14-2010, 11:56 AM

Yea I have a gauge, I'm getting plenty of boost. I mean it's noticeable enough, but only if I get on it a little bit.

I know HKS makes 3 different springs- red (12-18 psi), blue (7-14 psi) and yellow (6-12 psi). All three could technically work for our car, but red is a little big. The rate is simply what pressure is needed to vent, not how much it can hold.

I'm just curious as to what springs most people are using.

triggz · 10-14-2010, 02:13 PM

i have a red spring

Shieldze1025 · 10-15-2010, 12:52 AM

Quote:

Originally Posted by triggz

i have a red spring

Thanks man, I have to check what mine has. I'm out of town for work right now but I'm guessing it also has a red.

Anyone using yellow or blue, or the equivalent with a different BOV?

Misturrtinnie · 10-15-2010, 01:03 AM

I did not know that there is a spring in the HKS bov? I thought they were piston types with no springs or diaphram (Greddy's horrible design).

Ghines1279 · 10-26-2010, 09:16 PM

So, Im going to jack this thread a little bit, I read the box the SSQV came in, and it says thats not a spring load design. I noticed as well, just revving it up in neutral, that it wont open till like 4k. So i looked at the good ole boost gauge that the procede makes, and it says im not making boost til 4k, and even then its not more than 5psi. Driving around/under load, its good, ill make boost depending on how much pedal I give it. Also, when WOT and boost gets up to like 15-16 psi, it sounds like it opens then closes and opens again. Maybe what im hearing is that it starts to open, opens all the way, and then i hear it again when its partialy closed? Any one else have any experiance with this?

10-14-2010, 05:08 AM	#1
Shieldze1025 Keepin' America Free 72 Rep 1,260 Posts Drives: F10 535i Join Date: Dec 2009 Location: Haleiwa, HI iTrader: (7)	HKS BOV Springs Hey guys, I've done a lot of searching and can't find any details on anyone changing the springs in their BOV. They sell different springs for just about every BOV for different pressures, but I haven't seen anyone with an N54 doing it. I have seen that with the HKS SSQV BOV on my car, it is only noticeable if I hit about 4500 RPMs or higher. My question is, has anyone changed the springs on their BOV? I am just wondering if it is possible to get a spring that releases at a lower PSI. Negative comments not needed. TIA. __________________ F10 535i \| Retired: E60 ///M5 \| E92 335i "If everything seems under control, you're not going fast enough" -Mario Andretti
	Appreciate 0 Tweet Quote

10-14-2010, 05:54 AM	#2
Ghines1279 Second Lieutenant 7 Rep 238 Posts Drives: F30 335i Join Date: Mar 2009 Location: SAN DIEGO! iTrader: (5) Garage List 2007 e92 335i [0.00]	do you have a boost gauge? maybe your not making boost till then.
	Appreciate 0 Quote

10-14-2010, 08:05 AM	#3
triggz Banned 56 Rep 1,224 Posts Drives: E92 335i Join Date: Jun 2010 Location: Toronto iTrader: (2)	I think you have a boost leak. I notice my hks bov as little as 1500rpm.
	Appreciate 0 Quote

10-14-2010, 11:56 AM	#4
Shieldze1025 Keepin' America Free 72 Rep 1,260 Posts Drives: F10 535i Join Date: Dec 2009 Location: Haleiwa, HI iTrader: (7)	Yea I have a gauge, I'm getting plenty of boost. I mean it's noticeable enough, but only if I get on it a little bit. I know HKS makes 3 different springs- red (12-18 psi), blue (7-14 psi) and yellow (6-12 psi). All three could technically work for our car, but red is a little big. The rate is simply what pressure is needed to vent, not how much it can hold. I'm just curious as to what springs most people are using. __________________ F10 535i \| Retired: E60 ///M5 \| E92 335i "If everything seems under control, you're not going fast enough" -Mario Andretti
	Appreciate 0 Quote

10-14-2010, 02:13 PM	#5
triggz Banned 56 Rep 1,224 Posts Drives: E92 335i Join Date: Jun 2010 Location: Toronto iTrader: (2)	i have a red spring
	Appreciate 0 Quote

10-15-2010, 01:03 AM	#7
Misturrtinnie Addicted. 43 Rep 1,208 Posts Drives: 2007 335i Coupe AW Join Date: Apr 2010 Location: Dallas, Texas iTrader: (13)	I did not know that there is a spring in the HKS bov? I thought they were piston types with no springs or diaphram (Greddy's horrible design). __________________ #TeamNemesisTX
	Appreciate 0 Quote

10-26-2010, 09:16 PM	#8
Ghines1279 Second Lieutenant 7 Rep 238 Posts Drives: F30 335i Join Date: Mar 2009 Location: SAN DIEGO! iTrader: (5) Garage List 2007 e92 335i [0.00]	So, Im going to jack this thread a little bit, I read the box the SSQV came in, and it says thats not a spring load design. I noticed as well, just revving it up in neutral, that it wont open till like 4k. So i looked at the good ole boost gauge that the procede makes, and it says im not making boost til 4k, and even then its not more than 5psi. Driving around/under load, its good, ill make boost depending on how much pedal I give it. Also, when WOT and boost gets up to like 15-16 psi, it sounds like it opens then closes and opens again. Maybe what im hearing is that it starts to open, opens all the way, and then i hear it again when its partialy closed? Any one else have any experiance with this?
	Appreciate 0 Quote