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Author Topic: @ what psi does a dsm bov start leaking?  (Read 7801 times)

highroller54

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@ what psi does a dsm bov start leaking?
« on: August 06, 2009, 12:16:27 PM »
crushed and uncrushed please
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92CXyD

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Re: @ what psi does a dsm bov start leaking?
« Reply #1 on: August 06, 2009, 12:24:58 PM »
+1 I'm wondering the same thing since I use thes BOV's
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dvst8r

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Re: @ what psi does a dsm bov start leaking?
« Reply #2 on: August 06, 2009, 12:39:11 PM »
Iirc the 1G dsm bov starts leaking around 14psi, and modded can hold upwards of 25psi
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92CXyD

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Re: @ what psi does a dsm bov start leaking?
« Reply #3 on: August 06, 2009, 01:05:01 PM »
Modded = crushed right?
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crxvtec91

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Re: @ what psi does a dsm bov start leaking?
« Reply #4 on: August 06, 2009, 01:17:27 PM »
Quote from: 92CXyD on August 06, 2009, 01:05:01 PM
Modded = crushed right?

Yes although there is a way to mod them that does not involve crushing them.
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dvst8r

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Re: @ what psi does a dsm bov start leaking?
« Reply #5 on: August 06, 2009, 02:04:56 PM »
Quote from: 92CXyD on August 06, 2009, 01:05:01 PM
Modded = crushed right?

Crushed, jb welded, and redrilled
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highroller54

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Re: @ what psi does a dsm bov start leaking?
« Reply #6 on: August 06, 2009, 07:24:30 PM »
Quote from: dvst8r on August 06, 2009, 12:39:11 PM
Iirc the 1G dsm bov starts leaking around 14psi, and modded can hold upwards of 25psi

Yaa!
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89hatchsir

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Re: @ what psi does a dsm bov start leaking?
« Reply #7 on: August 08, 2009, 07:12:19 PM »
http://dsm.dejonpowerhouse.com/

Lookup - 1g DSM BOV (Air Bypass Valve) Leak Stop Kit    under bov-misc-tools
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Robb

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Re: @ what psi does a dsm bov start leaking?
« Reply #8 on: August 08, 2009, 08:22:33 PM »
They leak at idle.  :P

No seriously though it will be cracked open under vacuum.

Best way is the dodge garage mod, crushing is primitive and doesnt work well.

Few folks have removed the cap and installed shims on the spring, seems to work well.
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blowoff valves are for pussies.

kgx

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Re: @ what psi does a dsm bov start leaking?
« Reply #9 on: August 08, 2009, 11:13:10 PM »
most people don't know this, but it's possible to modify the 2g valves so that they cannot leak at any boost level.
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danz

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Re: @ what psi does a dsm bov start leaking?
« Reply #10 on: August 09, 2009, 12:13:59 AM »
Quote from: kgx on August 08, 2009, 11:13:10 PM
most people don't know this, but it's possible to modify the 2g valves so that they cannot leak at any boost level.

for serious?!?!  WOW thats fucking awesome.
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98redcavz24

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Re: @ what psi does a dsm bov start leaking?
« Reply #11 on: August 09, 2009, 12:48:40 AM »
13
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kgx

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Re: @ what psi does a dsm bov start leaking?
« Reply #12 on: August 09, 2009, 01:35:19 PM »
Quote from: danz on August 09, 2009, 12:13:59 AM
Quote from: kgx on August 08, 2009, 11:13:10 PM
most people don't know this, but it's possible to modify the 2g valves so that they cannot leak at any boost level.

for serious?!?!  WOW thats fucking awesome.

it's practically free too.

most folks never figured out how the valve actually works. the lower port of the diaphragm is supplied boost pressure via the hollow valve shaft. the trick is to plug the bottom of the valve shaft, drill a separate feed hole on the side of the shaft near the bottom by the valve seat and turn the valve around so the outlet is now the inlet.

voila, it's now a pull-type valve. boost now holds the valve shut. more boost holds it more shut. the valve only opens when there is pressure differential between the top and bottom ports of the diaphragm.
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Re: @ what psi does a dsm bov start leaking?
« Reply #13 on: August 09, 2009, 08:49:14 PM »
Quote from: Robb on August 08, 2009, 08:22:33 PM
They leak at idle.  :P

No seriously though it will be cracked open under vacuum.

Best way is the dodge garage mod, crushing is primitive and doesnt work well.

Few folks have removed the cap and installed shims on the spring, seems to work well.

QFT

Dodge garage mod rulz.
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Robb

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Re: @ what psi does a dsm bov start leaking?
« Reply #14 on: August 10, 2009, 01:24:47 PM »
Quote from: kgx on August 09, 2009, 01:35:19 PM
Quote from: danz on August 09, 2009, 12:13:59 AM
Quote from: kgx on August 08, 2009, 11:13:10 PM
most people don't know this, but it's possible to modify the 2g valves so that they cannot leak at any boost level.

for serious?!?!  WOW thats fucking awesome.

it's practically free too.

most folks never figured out how the valve actually works. the lower port of the diaphragm is supplied boost pressure via the hollow valve shaft. the trick is to plug the bottom of the valve shaft, drill a separate feed hole on the side of the shaft near the bottom by the valve seat and turn the valve around so the outlet is now the inlet.

voila, it's now a pull-type valve. boost now holds the valve shut. more boost holds it more shut. the valve only opens when there is pressure differential between the top and bottom ports of the diaphragm.

Or you could just buy a stock VW valve for $25 on amazon and have the same thing.
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highroller54

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Re: @ what psi does a dsm bov start leaking?
« Reply #15 on: August 13, 2009, 01:27:58 AM »
Quote from: Robb on August 10, 2009, 01:24:47 PM


Or you could just buy a stock VW valve for $25 on amazon and have the same thing.

Robb, tell me more. year of vw, pics, ect  :)
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Robb

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Re: @ what psi does a dsm bov start leaking?
« Reply #16 on: August 13, 2009, 11:45:27 AM »
Quote from: highroller54 on August 13, 2009, 01:27:58 AM
Quote from: Robb on August 10, 2009, 01:24:47 PM


Or you could just buy a stock VW valve for $25 on amazon and have the same thing.

Robb, tell me more. year of vw, pics, ect  :)

Its that same stupid plastic bov that vw uses on all the 1.8t's, its made by bosch and dirt cheap.  You put 60k miles on one and they might leak, but who the fuck cares when they are so cheap?  They work in push and pull forms.  For a high power application you might want to actually get something "real" but ive ran 2 of these bosch valves in pull form on my old supra and they work great.  Ill find a link...

Also, there is a larger version made of metal that the porsche guys use successfully up to 850hp, I think those are like $120.
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Re: @ what psi does a dsm bov start leaking?
« Reply #17 on: August 13, 2009, 12:04:05 PM »
Quote from: Robb on August 13, 2009, 11:45:27 AM
Quote from: highroller54 on August 13, 2009, 01:27:58 AM
Quote from: Robb on August 10, 2009, 01:24:47 PM


Or you could just buy a stock VW valve for $25 on amazon and have the same thing.

Robb, tell me more. year of vw, pics, ect  :)

Its that same stupid plastic bov that vw uses on all the 1.8t's, its made by bosch and dirt cheap.  You put 60k miles on one and they might leak, but who the fuck cares when they are so cheap? 

get the one with part # ending in 710 N. that's the upgraded version, the others tend to tear diaphragms.
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