Synchronic BOV

synapseengineering · 06-21-2007, 03:50 PM

There have been some threads inquiring about this design
and I would like to answer any questions/concerns that you have regarding this product and how it works. I can't post links to the user manual or vids, so if you would like to see these PM me and I will send you the links.

Synchronic was designed to be a fast acting BOV that eliminates compressor surge and has these features:
*Retails for $219 (contact your NASIOC sponsor retailer)
*Atmospheric or recirculated discharge
*Retail kit includes 1.25" recirc fitting and stainless weld-on pipe flange
*No need to adjust or figure out which spring to use for your application
*Interchangeable mounting flanges so that you don't have to refabricate when switching from another BOV
-HKS SSQ/TypeII mounting flange
-Greddy Type S/R, HKS racing mounting flange
-Aluminum Weld-on flange
-Tial 50mm mounting flange (available in 3 weeks)
-1" inlet & discharge hose-end fittings (available in 3 weeks)
*Anti-stall valve is now available for MAF cars with an atmospheric dump
*An overboost protection circuit is in development that is already built into the BOV

RallyBlue · 06-22-2007, 01:23 AM

Here are some videos explaining this breakethrough in BOV/BPV design.

Synapse BOV vs Tial http://videos.streetfire.net/video/4...ee0182efa3.htm
Synapse BOV vs HKS SSQV http://videos.streetfire.net/video/6...3f0150f005.htm

He also has a EWG that works on the same princepal
http://videos.streetfire.net/video/7...e900493336.htm
http://www.youtube.com/watch?v=LStlqe64m4M

And the SEMA 2006 Streetfire interview
http://videos.streetfire.net/video/b...7800261cd3.htm

I am currently running a prototype synapse 40mm EWG on my 30R WRX
I can say that against the Tial 38mm that I was running this WG is Very smooth. The power delivery is more linear and does not choke when at the top of the RPM band.

These products are very well designed and would highly recomend them to anyone going EWG or to replace your current WG with these.

engineerx · 06-28-2007, 02:40 PM

Any updates?
Are the EWG's available yet? >> which vendors?

synapseengineering · 06-28-2007, 02:53 PM

EWG's are in stock now. The only thing I don't know is which of my distributors are NASIOC sponsors, so for the retailers out there I'll post the wholesalers that the NASIOC sponsors probably buy from:

Pro-Motion Distributing
Motovicity Distributing

or you can check out our distributor page

Andrew · 06-28-2007, 04:07 PM

What does an anti-stall valve mean?

Andrew · 06-28-2007, 07:16 PM

I just read your manual: http://www.synapseengineering.com/ar...bov_manual.pdf

it sounds like the valve allows the BOV to close during vacuum; therefore, not forcing the car to run rich or other problems which are generally associated with an atomospheric bov with a car where the maf is before the turbo.

am i right?

bzbuzz · 06-28-2007, 10:06 PM

so this bov is safe for WRX for sure? and we can enjoy the sound w/o no problem at all? I am very curious to see actual reviews from us...anybody?

synapseengineering · 06-29-2007, 03:35 AM

I designed Synchronic BOV to be fast reacting. Basically, to follow exactly the events in the intake manifold. Ideally, I would like to see end-users re-routing the discharge after the air flow meter. When this is done you may actually see improved gas mileage as well since this is feedback that we have received.

However, I know that there are many out there that want that atmospheric dump. And so, the Anti-Stall valve was developed so that you could dump to atmo and still be able to idle without the car running lean at idle by sucking in unmetered air after the MAF (correct Andrew). However, whenever you dump metered air out to atmo you have fuel in the system without the amount of air that was intended for it, so you may still get richness between gears.

Andrew · 06-29-2007, 06:48 PM

I don't understand how the anti-stall works. Could you explain it to me? Why would it work when the car idles but not when you shift?

NM I think I get it. When you shift, you let out the boost pressure, but at idle it closes... So it closes when you shift too, but the point is, is that you are letting out metered air and nothing is compensating for that.

edit:

After thinking about it, wouldn't the richness come from sucking air in after the maf? Instead of letting the air out?

dingobite · 07-02-2007, 04:51 AM

Any updates yet on the BOV when it will be availible for subarus ?

djerickd · 07-03-2007, 01:16 AM

Awesome deisgn! PM'd u

arkedias · 07-05-2007, 10:30 AM

good deal !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

synapseengineering · 07-08-2007, 04:01 PM

Finally a vid on a Subaru, the slight flutter you hear is from the anti-stall valve because this user wanted it dumped to atmosphere, it is non-existent when recirculated.

http://www.youtube.com/watch?v=NQAcVgKPXG4

djerickd · 07-08-2007, 09:29 PM

wow it's very effective!!

ERIKBROCKHOFF · 07-08-2007, 09:59 PM

#2 FTW if the car isn't running rich in between shifts.

ERIKBROCKHOFF · 07-08-2007, 10:01 PM

Or put holes in the hood LOL

bzbuzz · 07-08-2007, 11:39 PM

can we hear it w/ recirculated one?

flwrx · 07-09-2007, 12:59 AM

does it require lubricating or cleaning?

synapseengineering · 07-09-2007, 03:42 AM

flwrx, the SB001 comes pre-lubricated from the factory. The lubricant is proprietary and will not evaporate over time and should not require further application. Also, the Synchronic geometry allows the design not to have metal to metal contact, so the only potential wear points over time are the o-rings and our formulated lubricant should eliminate that possibility.

BZ-It is very hard to hear recirculated.

BTW, Anytime you dump metered air to atmosphere, you will run rich between shifts. Although some BOVs make the effect worse than with others. It is all about fast actuation, we're talking milliseconds. The faster the valve shuts between gears, the less richness you get.

dingobite · 07-09-2007, 01:52 PM

Quote:

Originally Posted by synapseengineering

Finally a vid on a Subaru, the slight flutter you hear is from the anti-stall valve because this user wanted it dumped to atmosphere, it is non-existent when recirculated.

http://www.youtube.com/watch?v=NQAcVgKPXG4

My forge bpv sounds every much like the tial including the whiny little ping sounds during boost, during the time underboosting and dropping out of boost at WOT i can no longer stand the sound.

You bov sounds much nicer even venting like a bov.

synapseengineering · 07-10-2007, 04:14 AM

This is something to look into. I haven't heard of this being prevalent with the Forge units. Thanks for the heads up.

dingobite · 07-10-2007, 09:15 AM

Im not sure if i just have a defective unit or not, theres a few things that could be wrong i will be taking it with me for my tune next week.

I think it may be my tune thats making it sound this way im not 100% possitive but i think that what the problem is.

sorry to /thread jack.

EDITED i think i know the problem.

Fauj · 07-18-2007, 10:37 PM

will the bov come with a flange that fits the stock intercooler? And is the resirc piece included?

who is the nasioc vendor?

synapseengineering · 07-19-2007, 04:05 AM

The BOV kits are currently going to be the universal kit and you would then purchase the flange kit for your given model. This may actually be a good thing for most. Once you upgrade your intercooler piping you will already have the weld-on flange and recirculation fitting.

Fauj · 07-19-2007, 01:12 PM

r u selling the flange kit for the stock intercooler i guess is my question then, is it avaliable?

06-21-2007, 03:50 PM	#1
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	Synchronic BOV There have been some threads inquiring about this design and I would like to answer any questions/concerns that you have regarding this product and how it works. I can't post links to the user manual or vids, so if you would like to see these PM me and I will send you the links. Synchronic was designed to be a fast acting BOV that eliminates compressor surge and has these features: Retails for $219 (contact your NASIOC sponsor retailer) Atmospheric or recirculated discharge Retail kit includes 1.25" recirc fitting and stainless weld-on pipe flange No need to adjust or figure out which spring to use for your application Interchangeable mounting flanges so that you don't have to refabricate when switching from another BOV -HKS SSQ/TypeII mounting flange -Greddy Type S/R, HKS racing mounting flange -Aluminum Weld-on flange -Tial 50mm mounting flange (available in 3 weeks) -1" inlet & discharge hose-end fittings (available in 3 weeks) Anti-stall valve is now available for MAF cars with an atmospheric dump *An overboost protection circuit is in development that is already built into the BOV

06-29-2007, 06:48 PM	#9
Andrew Scooby Guru Member Sales Rating: (3) Member#: 1170 Join Date: Mar 2000 Chapter/Region: BAIC Location: San Jose, CA Vehicle: 2005 STi White	I don't understand how the anti-stall works. Could you explain it to me? Why would it work when the car idles but not when you shift? NM I think I get it. When you shift, you let out the boost pressure, but at idle it closes... So it closes when you shift too, but the point is, is that you are letting out metered air and nothing is compensating for that. edit: After thinking about it, wouldn't the richness come from sucking air in after the maf? Instead of letting the air out? Last edited by Andrew; 06-30-2007 at 04:07 PM.

07-03-2007, 01:16 AM	#11
djerickd Scooby Guru Member Sales Rating: (34) Member#: 3782 Join Date: Jan 2001 Chapter/Region: South East Location: Tampa Btch! Vehicle:* 02 Old Skool WRX WFC #040 Still Flossin!!!	Awesome deisgn! PM'd u Last edited by djerickd; 07-03-2007 at 02:34 AM.

07-10-2007, 09:15 AM	#22
dingobite Scooby Specialist Member Sales Rating: (23) Member#: 82391 Join Date: Mar 2005 Chapter/Region: MWSOC Location: Lou. ky Vehicle: 08 OBP Sti 328awhp, 370tq	Im not sure if i just have a defective unit or not, theres a few things that could be wrong i will be taking it with me for my tune next week. I think it may be my tune thats making it sound this way im not 100% possitive but i think that what the problem is. sorry to /thread jack. EDITED i think i know the problem. Last edited by dingobite; 07-16-2007 at 11:20 AM.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

06-22-2007, 01:23 AM	#2
RallyBlue Scooby Newbie Member Sales Rating: (2) Member#: 69323 Join Date: Aug 2004 Chapter/Region: MWSOC Location: Indiana, near Cincy Vehicle: 2004 WRX 82 BRAT	Here are some videos explaining this breakethrough in BOV/BPV design. Synapse BOV vs Tial http://videos.streetfire.net/video/4...ee0182efa3.htm Synapse BOV vs HKS SSQV http://videos.streetfire.net/video/6...3f0150f005.htm He also has a EWG that works on the same princepal http://videos.streetfire.net/video/7...e900493336.htm http://www.youtube.com/watch?v=LStlqe64m4M And the SEMA 2006 Streetfire interview http://videos.streetfire.net/video/b...7800261cd3.htm I am currently running a prototype synapse 40mm EWG on my 30R WRX I can say that against the Tial 38mm that I was running this WG is Very smooth. The power delivery is more linear and does not choke when at the top of the RPM band. These products are very well designed and would highly recomend them to anyone going EWG or to replace your current WG with these.

06-28-2007, 02:40 PM	#3
engineerx Scooby Specialist Member Sales Rating: (32) Member#: 42614 Join Date: Sep 2003 Chapter/Region: SCIC Location: Bullet-Dodging Fwy Los Angeles Vehicle: 0405 WRX STi/S2000 AspenWhite/Silverstone	Any updates? Are the EWG's available yet? >> which vendors?

06-28-2007, 02:53 PM	#4
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	EWG's are in stock now. The only thing I don't know is which of my distributors are NASIOC sponsors, so for the retailers out there I'll post the wholesalers that the NASIOC sponsors probably buy from: Pro-Motion Distributing Motovicity Distributing or you can check out our distributor page

06-28-2007, 04:07 PM	#5
Andrew Scooby Guru Member Sales Rating: (3) Member#: 1170 Join Date: Mar 2000 Chapter/Region: BAIC Location: San Jose, CA Vehicle: 2005 STi White	What does an anti-stall valve mean?

06-28-2007, 07:16 PM	#6
Andrew Scooby Guru Member Sales Rating: (3) Member#: 1170 Join Date: Mar 2000 Chapter/Region: BAIC Location: San Jose, CA Vehicle: 2005 STi White	I just read your manual: http://www.synapseengineering.com/ar...bov_manual.pdf it sounds like the valve allows the BOV to close during vacuum; therefore, not forcing the car to run rich or other problems which are generally associated with an atomospheric bov with a car where the maf is before the turbo. am i right?

06-28-2007, 10:06 PM	#7
bzbuzz Scooby Specialist Member Sales Rating: (9) Member#: 116052 Join Date: May 2006 Chapter/Region: MWSOC Location: 글렌 IL Vehicle: 06 wrx ltd vf34ed	so this bov is safe for WRX for sure? and we can enjoy the sound w/o no problem at all? I am very curious to see actual reviews from us...anybody?

06-29-2007, 03:35 AM	#8
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	I designed Synchronic BOV to be fast reacting. Basically, to follow exactly the events in the intake manifold. Ideally, I would like to see end-users re-routing the discharge after the air flow meter. When this is done you may actually see improved gas mileage as well since this is feedback that we have received. However, I know that there are many out there that want that atmospheric dump. And so, the Anti-Stall valve was developed so that you could dump to atmo and still be able to idle without the car running lean at idle by sucking in unmetered air after the MAF (correct Andrew). However, whenever you dump metered air out to atmo you have fuel in the system without the amount of air that was intended for it, so you may still get richness between gears.

07-02-2007, 04:51 AM	#10
dingobite Scooby Specialist Member Sales Rating: (23) Member#: 82391 Join Date: Mar 2005 Chapter/Region: MWSOC Location: Lou. ky Vehicle: 08 OBP Sti 328awhp, 370tq	Any updates yet on the BOV when it will be availible for subarus ?

07-05-2007, 10:30 AM	#12
arkedias * Banned * Member Sales Rating: (0) Member#: 153090 Join Date: Jul 2007	good deal !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

07-08-2007, 04:01 PM	#13
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	Finally a vid on a Subaru, the slight flutter you hear is from the anti-stall valve because this user wanted it dumped to atmosphere, it is non-existent when recirculated. http://www.youtube.com/watch?v=NQAcVgKPXG4

07-08-2007, 09:29 PM	#14
djerickd Scooby Guru Member Sales Rating: (34) Member#: 3782 Join Date: Jan 2001 Chapter/Region: South East Location: Tampa Btch! Vehicle:* 02 Old Skool WRX WFC #040 Still Flossin!!!	wow it's very effective!!

07-08-2007, 09:59 PM	#15
ERIKBROCKHOFF Scooby Newbie Member Sales Rating: (0) Member#: 142599 Join Date: Mar 2007 Chapter/Region: RMIC Location: SLC Vehicle: 2002 WRX silver	#2 FTW if the car isn't running rich in between shifts.

07-08-2007, 10:01 PM	#16
ERIKBROCKHOFF Scooby Newbie Member Sales Rating: (0) Member#: 142599 Join Date: Mar 2007 Chapter/Region: RMIC Location: SLC Vehicle: 2002 WRX silver	Or put holes in the hood LOL

07-08-2007, 11:39 PM	#17
bzbuzz Scooby Specialist Member Sales Rating: (9) Member#: 116052 Join Date: May 2006 Chapter/Region: MWSOC Location: 글렌 IL Vehicle: 06 wrx ltd vf34ed	can we hear it w/ recirculated one?

07-09-2007, 12:59 AM	#18
flwrx Scooby Specialist Member Sales Rating: (25) Member#: 35944 Join Date: Apr 2003 Chapter/Region: South East Location: west palm Vehicle: '03 WRX '76 Fleetwood Brougham	does it require lubricating or cleaning?

07-09-2007, 03:42 AM	#19
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	flwrx, the SB001 comes pre-lubricated from the factory. The lubricant is proprietary and will not evaporate over time and should not require further application. Also, the Synchronic geometry allows the design not to have metal to metal contact, so the only potential wear points over time are the o-rings and our formulated lubricant should eliminate that possibility. BZ-It is very hard to hear recirculated. BTW, Anytime you dump metered air to atmosphere, you will run rich between shifts. Although some BOVs make the effect worse than with others. It is all about fast actuation, we're talking milliseconds. The faster the valve shuts between gears, the less richness you get.

07-10-2007, 04:14 AM	#21
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	This is something to look into. I haven't heard of this being prevalent with the Forge units. Thanks for the heads up.

07-18-2007, 10:37 PM	#23
Fauj Scooby Newbie Member Sales Rating: (2) Member#: 142777 Join Date: Mar 2007 Chapter/Region: South East Location: North central florida Vehicle: 2007 wrx limited crystal grey	will the bov come with a flange that fits the stock intercooler? And is the resirc piece included? who is the nasioc vendor?

07-19-2007, 04:05 AM	#24
synapseengineering Scooby Newbie Member Sales Rating: (0) Member#: 111393 Join Date: Mar 2006	The BOV kits are currently going to be the universal kit and you would then purchase the flange kit for your given model. This may actually be a good thing for most. Once you upgrade your intercooler piping you will already have the weld-on flange and recirculation fitting.

07-19-2007, 01:12 PM	#25
Fauj Scooby Newbie Member Sales Rating: (2) Member#: 142777 Join Date: Mar 2007 Chapter/Region: South East Location: North central florida Vehicle: 2007 wrx limited crystal grey	r u selling the flange kit for the stock intercooler i guess is my question then, is it avaliable?