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Old 05-09-2007, 05:13 AM   #1
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Default Synchronic Blow Off Valve

Not sure if this has been brought up here before or not but it looks nice!

http://www.youtube.com/watch?v=MU5Y6d9rh1k
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Old 05-09-2007, 09:50 AM   #2
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dude no fair now i a thinking about a BOV geez
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Old 05-09-2007, 10:01 AM   #3
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what i dont understand is that it opens as he blips the throttle....form what i can tell, and why i think it reacts "so fast," is that if the thing is open when WOT obviously it's going to blow off faster....however, wouldn't you leak boost pressure also? Mine closes tight when i blip the throttle and releases just as fast as when i let off.
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Old 05-09-2007, 10:06 AM   #4
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dunno i dont have surge on throttle blip more pronounced on 10+ psi quick off the gas. But this might be for me if i can find one cheap enough who makes a cheap good one? the one posted is 200+$
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Old 05-09-2007, 11:28 AM   #5
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Didn't watch it all the way through but it looks like the valve is always open under vacuum. Sure it works great on a MAP based car...

Really like the comparison to a Tial that probably has the stiffest vac spring possible in it... if they had the correct spring in the Tial it would open without any assist from the pressurized air in the charge pipe. I detest that sort of marketing.
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Old 05-09-2007, 11:43 AM   #6
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that was the HKS SSQ not a tial they compared it with
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Old 05-09-2007, 11:51 AM   #7
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I'm referring to a different video that was linked to off of the one posted, I didn't watch all of that first one.
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Old 05-09-2007, 11:56 AM   #8
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My tial is sealed tight until vac is applied. It has a 12lb spring in it and I have never seen it leak or anything like that. It snaps right open under nearly all boost levels. When at a stop I can operate the throttle by hand like that guy and see it move a little.
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Old 05-09-2007, 02:34 PM   #9
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I just went out and fooled around with mine...I trust mine opens and closes just as rapidly. I know Synchronic's thing is eliminating the diaphram, however, is it really that big of a deal?
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Old 05-09-2007, 02:55 PM   #10
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bailey bovs are pistons....

mine opens when i barely rev the engine....

so i will keep it.
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Old 05-09-2007, 03:15 PM   #11
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I can't understand: is the syncronic bov open at idle??

Isn't it a bad thing? expecially if you use an afm?
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Old 05-09-2007, 03:19 PM   #12
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it's why you add the "anti-stall" guy or recirculate.
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Old 05-09-2007, 03:20 PM   #13
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Do people run a BOV like that with out a filter on it? Sucking un filtered air into the engine at idle is bad m'kay.
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Old 05-09-2007, 03:29 PM   #14
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Quote:
Originally Posted by Braineack View Post
it's why you add the "anti-stall" guy or recirculate.
Ok, what's an anti-stall valve?
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Old 05-09-2007, 03:30 PM   #15
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It looks to be open at idle... when they have the tissue paper in front of the valve you can see the valve suck it in.

My take is they are using questionable comparisons to manufacture a demand for a problem that doesn't exist.
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Old 05-09-2007, 03:40 PM   #16
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Quote:
Originally Posted by jhoexp View Post
Ok, what's an anti-stall valve?

simplest way to describe it is a one-way check valve.

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Old 05-09-2007, 03:47 PM   #17
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I think it was only open in the video as a demo to see how fast it is. Normaly it would be recrc. From what ive heard they are releasing a anti-stall sometime this month. It is pricey at over 200, but i did payed more then that for my Greddy RS after the recerc adapter and mounting flange.
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Old 05-09-2007, 03:50 PM   #18
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Quote:
Originally Posted by Braineack View Post
simplest way to describe it is a one-way check valve.
So the air that goes out of the syncronic bov has to push a diaprhragm to open the check valve, right?

It's seem to me that make much more sense if you recirculate it, otherwise you still have a diaphragm blocking the air and slowing the flow...
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Old 05-09-2007, 03:52 PM   #19
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exactly why I was recirculated when non-MAP.
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Old 05-09-2007, 03:54 PM   #20
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Im not recirc with my afm and run fine. Its all a matter of leaking at idle.
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