Anyone running a Synchronic bov?

[speedgod^s13]

I've decided between 2 bov's, and the finalists are the Synchronic, and the Tial. I need input on the Synchronic, if anyone here is running it on their sr.

[aznrib]

I am to install it. I'll let you know

[S14DB]

Don't run it ATM on a MAF system. No spring means it will float and stay open at vacuum.

[Rayne]

Don't run it ATM on a MAF system. No spring means it will float and stay open at vacuum.

The Synapse Engineering synchronic blow off valve does have a spring. According to the Synapse Engineering web site their blow off valve is a spring and piston vs. spring and diaphragm.

[S14DB]

The Synapse Engineering synchronic blow off valve does have a spring. According to the Synapse Engineering web site their blow off valve is a spring and piston vs. spring and diaphragm.

Link to the page?

Their WG has one but their BOV is just a SQV with a piston instead of a diaphragm. If it had a spring it wouldn't sit open at idle.

http://www.youtube.com/watch?v=MU5Y6d9rh1k
Sigh, he doesn't know what he's taking about in the video. Just spouting BS. Making fun of the SSQV when their design is a knock off of it. Hell if I was HKS I would sue them. Saying the SSQV is not venting when the first stage of the Sequential is opening every time. They are taking advantage of people that don't know how BOVs work.

[!Zar!]

EXACTLY.

If I were op, I'd buy an ssqv as opposed to a Synchronic.

[Silverbullet]

I've decided between 2 bov's, and the finalists are the Synchronic, and the Tial. I need input on the Synchronic, if anyone here is running it on their sr.

did you not see and hear the video of the Synchronic VS Tial side by side?

Agreed with previous posts. it is the same design as the HKS SSQV. Find a used SSQV... best bang for the buck for the best BOV out htere. Just make sure its the older version that is adjustable. I hate where the new ones with the fake cooling vents are going...

[MavericStephenc]

I see having the spring and piston as an advantage.

look how much quicker the synchronic let off boost compared to the ssqv. I believe thats partly due to the absence of a diaphram.
I would much rather have a solid piston holding my boost as opposed to a rubber diaphram that will stretch and be affected by heat.

the fact that the valve is open during idle is irrelevent, because it doesnt need to hold boost at idle it does how ever close immediatly during the presence of boost.
in fact the valve is probably held open by the spring. once boost is applied the spring is compressed closing the valve. reverse the process for lettign off the gas.
over all I think the syncronic valve is a good design.

note: I use a blitz dd on my s14 so i cant account for the durability of either hks or synchronic

[!Zar!]

Does it matter how fast it opens is the real question.

I say no.

Don't fall into the hype.

That's like marketing a car and claiming it's better because the windows roll down faster.

[MavericStephenc]

the point is the faster it opens the less chance of having compressor surge. ( I get it with my blitz b.o.v)

i dont recall hearing compressor surge with the syncronic unit.

[S14DB]

I see having the spring and piston as an advantage.

look how much quicker the synchronic let off boost compared to the ssqv. I believe thats partly due to the absence of a diaphram.
The response is the same. Watch the center of the SSQV for movement. The SSQV is a dual stage BOV. The center opens up under low boost. The outer opens up for higher boost. Also the SSQV not being hooked upto the charge pipe leaves the Sync at an advantage. The spring in the sync is obliviously softer then the SSQV as it can't even keep the valve closed. Anyone that has adjusted a BOV knows when you soften it up it's "response" goes up along with flutter.

I would much rather have a solid piston holding my boost as opposed to a rubber diaphram that will stretch and be affected by heat.

As opposed to o-rings that will swell in heat and stick? High end BOVs don't use rubber diaphragms.


the fact that the valve is open during idle is irrelevent, because it doesnt need to hold boost at idle it does how ever close immediatly during the presence of boost.
in fact the valve is probably held open by the spring. once boost is applied the spring is compressed closing the valve. reverse the process for lettign off the gas.
over all I think the syncronic valve is a good design.

note: I use a blitz dd on my s14 so i cant account for the durability of either hks or synchronic
It is completely relevant. The Valve should be closed not open. Spring is weaker to improve response over the other valve.
Open means air can get in. Un-Metered in a MAF system and unfiltered in all.

It takes time for that valve to close when going into boost. it will also flutter under part throttle and transitive periods.

There are other reasons also. But I don't want to start quoting books.

the point is the faster it opens the less chance of having compressor surge. ( I get it with my blitz b.o.v)

i dont recall hearing compressor surge with the syncronic unit.

Turn your spring down if you are getting surge.

Only reason there is no surge is cause the spring is so weak. Watching their video on "flutter" the problem was the one BOV spring was to heavy. Not that the BOV was bad. Seems like they are praying on people that don't know how to ajust a BOV.

[MavericStephenc]

good points. still has anyone here tested it?

also I did turn it down. helped a bit.

[!Zar!]

the point is the faster it opens the less chance of having compressor surge. ( I get it with my blitz b.o.v)

i dont recall hearing compressor surge with the syncronic unit.

I run no blow off valve. Shit isn't the worst thing on earth.

Lets say the for conversations sake, the ssqv opened 1/2 second slower, (as fucking if.) That .500 of a second won't be the end of your turbo.

Idleing the car puts more stress on it, shit.

Don't fall into hype.

[Soup Nazi]

did you not see and hear the video of the Synchronic VS Tial side by side?

Agreed with previous posts. it is the same design as the HKS SSQV. Find a used SSQV... best bang for the buck for the best BOV out htere. Just make sure its the older version that is adjustable. I hate where the new ones with the fake cooling vents are going...


The new version isn't Adjustable? Is the older model better because of this?

[S14DB]

In response to the Sync vs tial video. Many have said the Tial was adjusted improperly.

How it should sound:
http://www.youtube.com/watch?v=8-JTfgpFKrM

[Rayne]

As requested by a fellow member:
Synapes Engineering Website (http://www.synapseengineering.com/)


Consider this as correcting my earlier post: The design philosophy behind Synchronic Blow-Off valve SB001 (http://synapseengineering.com/smf/index.php?PHPSESSID=9ca15c8e7a59d9f658ee57178d6a11 71&topic=30.0)

[silnismo]

kuruptR did an review of the synapes BOV in his build thread, very detailed.


I actually had some problems running the Synapse BOV open to atmosphere. Upon installation I had some major idling issues, it was leaking pretty badly on the hardest pre-load setting. There is no room for adjusting to close it shut, I took it a part to see what I could do to modify it. I ended up putting a spacer on the spring seat so I could get it to close up, it works now NO LEAKS.

Pros & Cons:
Is it as responsive as a HKS SSQV? unfortunatly NOT.

Limited noise, a good thing! It opens and closes pretty fast.

Too keep the BOV sealed at idle, I had to put a bunch of pre-load on the spring. So it needs about 5lbs of boost to blow off.

Unit it self is pretty large for what it does, my Greddy RS would have been fine. But the synapse looks so good :D

2 Vacuum ports? uhh why?! I did a bunch of differnt varations with the vacuum hosing, doesnt seem like it does much hooking both up. I tested a few combos.kuruptR

[SoSideways]

did you not see and hear the video of the Synchronic VS Tial side by side?

Agreed with previous posts. it is the same design as the HKS SSQV. Find a used SSQV... best bang for the buck for the best BOV out htere. Just make sure its the older version that is adjustable. I hate where the new ones with the fake cooling vents are going...

The older adjustable ones are actually a bit less reliable than the newer ones without the spring. This is coming from someone who has seen people report that their SQV w/ the adjusting screws in the back break, while the ones without the adjusting screws have been working just fine.

The cooling fins are actually part of the body of the new SQV. They should help with dissipating the heat, which should prolong the live of some of the plastic parts inside the unit. The fins are a lot like the cooling fins in front of the head on the black top SR motors. Whether they work or not, that's up to someone with the proper equipment to find out.

As for me, I think in theory it should work well, and I can't wait to put mine on.

[!Zar!]

Htf are people breaking the bov adjustment bolts?

I mean, adjust it once. Maybe another time if you change turbo's or something and that's it.

Wtf.

[SoSideways]

Htf are people breaking the bov adjustment bolts?

I mean, adjust it once. Maybe another time if you change turbo's or something and that's it.

Wtf.

I don't know, but honestly, they shouldn't even really touch it, as long as they can idle without the valve open, they're good to go.

Any type of positive pressure in the piping, even at like 5 in.Hg of vacuum, the spring + the air in the piping should help close the valve and keep it sealed, until the throttle closes and vacuum in the intake manifold pulls on the diaphram of the BOV.

Honestly, I don't know why people have to tinker with stuff that doesn't need tinkering.

[sr20boostn20]

i used to run an hks ssqv till the car started makeing over 380whp,

then i swityched to the tial 55mm

it was my feeling that quarter sized hole in the ssqv was nothign compared to nearly the whole outside of the permiter of the tial.

thus allowing the tial to vent the pipes faster and easier.

in modified a few years back they did a spread on fake parts, i thought they had said that the ssqvs with the screw in the back were knock offs.

mine that i got from jap land had no screw and one of my buddies had a 1st get ssqv which looks nothing like the second and third gens

[s13derfter]

Don't run it ATM on a MAF system. No spring means it will float and stay open at vacuum.

is this true? so it will not work properly n any car with maf sensors?

[SoSideways]

is this true? so it will not work properly n any car with maf sensors?

Think about it.

If you're sucking in MORE AIR than what is metered by the MAF sensor after the sensor, then your idle will be very lean, which could lean to some weird idle characteristics.

[speedgod^s13]

Wow, you guys are great. What about the Tial then? I'm sure someone is running it. I used to run an hsk ssq, but I hated the high pitched sound, it made. If I decide to run it again, i'm going to grab the different colored insert, and change the sound.

[aznrib]

Sorry for bringing those post back up but just in case someone searches for this bov in the future.... it sucks major monkey balls.

It is only good if you are not running a MAF setup. During idle it is open so it sucks in unmetered air which caused the idle to be all sorts of messed up. So I picked up the anti-stall kit. The car idled fine but I got compression surge. It kept the air out during idle but it the design didn't let air out either. So now i'm just running a recirulation setup.

[kazuma]

Sorry for bringing those post back up but just in case someone searches for this bov in the future.... it sucks major monkey balls.

It is only good if you are not running a MAF setup. During idle it is open so it sucks in unmetered air which caused the idle to be all sorts of messed up. So I picked up the anti-stall kit. The car idled fine but I got compression surge. It kept the air out during idle but it the design didn't let air out either. So now i'm just running a recirulation setup.

So its okay if you recirculate it and you dont want the bov ricer sounds :p? at a performance aspect isn't it better to recirculate when you are making over 350whp?

[Jordan-S13-Silvia]

I have the sychronic on my sr and its the shit man get it.

Don't run it ATM on a MAF system. No spring means it will float and stay open at vacuum.

What do you mean dont run it its the best on the market. Besides if your running a maf they have a anti stall valve kit thats specifically for that reason.

[SoguRacing]

I have a synapse bov on my sr and i'm as happy as can be with it. it's just freaken huge compared to the other bov's. looks futuristic

[S14DB]

I have the sychronic on my sr and its the shit man get it.



What do you mean dont run it its the best on the market. Besides if your running a maf they have a anti stall valve kit thats specifically for that reason.It's not the best on the market. It's a Bunch of hype wrapped in flawed testing.

[Silverbullet]

The older adjustable ones are actually a bit less reliable than the newer ones without the spring. This is coming from someone who has seen people report that their SQV w/ the adjusting screws in the back break, while the ones without the adjusting screws have been working just fine.

The cooling fins are actually part of the body of the new SQV. They should help with dissipating the heat, which should prolong the live of some of the plastic parts inside the unit. The fins are a lot like the cooling fins in front of the head on the black top SR motors. Whether they work or not, that's up to someone with the proper equipment to find out.


I'm sure the fins do help cool, but i dont think it'll be noticeable. If HKS actually did put the cooling fins on there for cooling, it would have been easier to just use gaskets sustained for a higher temp. Lets be honest. The fins are for styling. It makes it harder for Chinese factories to replicate. That was my first thought when i saw them.

Do you have a newer one? I have never physically touched the newer ones and im surprised they don't have a spring. Is it just purely vac actuated? I was thinking about pulling the spring out of mine to make it more responsive.

[SoSideways]

I'm sure the fins do help cool, but i dont think it'll be noticeable. If HKS actually did put the cooling fins on there for cooling, it would have been easier to just use gaskets sustained for a higher temp. Lets be honest. The fins are for styling. It makes it harder for Chinese factories to replicate. That was my first thought when i saw them.

Do you have a newer one? I have never physically touched the newer ones and im surprised they don't have a spring. Is it just purely vac actuated? I was thinking about pulling the spring out of mine to make it more responsive.

Yes I have a new one.

No it does not have the adjustable screw for the spring, but a spring is in there to help push the valves closed during idle.

If you pull the spring, then your valve will probably open during idle, which is not good.

[Silverbullet]

idle probably wouldn't be affected since i recirculate.

[l8nightjay]

over on the sr20forum site I read a thread on the synapsis bov and everyone there had nothing but good comments and praise about it. Most of them also ran it to recirculated with there sr's. dont know if this helps anyone, just what I read..

[aznrib]

I have a synapse bov on my sr and i'm as happy as can be with it. it's just freaken huge compared to the other bov's. looks futuristic

How are you running it? Whats your setup?

[180Sil]

i had the synchronic on the cold pipe with the anti-stall kit and it still wasn't closing right so i switch over to ssqv but i'm getting some surge on really low boost. this is all on a maf system once i go map than all problem will be solved.

[singlecamslam]

i run a hks ssq BOV with a maf vented to the atmosphere. It runs and idles perfect. It blows off as soon as i give it some gas. It works perfect and in my opinion the BOV out there.

[aznrib]

i had the synchronic on the cold pipe with the anti-stall kit and it still wasn't closing right so i switch over to ssqv but i'm getting some surge on really low boost. this is all on a maf system once i go map than all problem will be solved.

I have the same problem but mine is on the hot pipe. But when it was suppose to blow off, the anti-stall kit kept the air in.

[smelly240]

the "compressor surge" you hear at really low boost is normal... you cannot eliminate it ALL - even if you dont hear it - its there...

going map/venting shouldnt have much of an effect on it.

[rebornS14]

i just installed a synapse bov today and it works great. got rid of my surge that my previous blitz was giving me. sounded cool but i just got a new turbo so had to go safe.

[hOngsterr]

if your KA-T does it still recirculates? lol

[rebornS14]

no S13 SR to atmosphere

[Ceepo]

I have the new HKS BOV(finned one) on my sr20det and its not vented, only problem i have with it is it wont open when its cold, and when it does open its under 7psi or more of boost. I figure its just a t-25 compressor surge isnt gonna kill me and the turbo is cheap to rebuild/replace anyway. Any idea why it would not open tho, all my other freinds with it when they rev at idle it opens, mine not so much lol...

[rebornS14]

the vacuum line that goes to the bov. where is it comming from?