May 20, 2012, 12:53:50 PM
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Author Topic: BOV boost limits  (Read 858 times)

Kapok6

  • WEREWOLF Owner
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  • Posts: 283
  • 'ello poppet
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: FP3065
BOV boost limits
« on: February 22, 2011, 01:53:22 PM »
So I am currently of the mind state that I will either run 1G BOV's or TiAL's. My question is, I have a dodge garage modded 1G BOV (Thanks Andrew) and a couple unmolested BOV's. I intend on running 23-25PSI on my FP3065 this year and was wondering if the Dodge Garage 1G will be fine for this setup, and if not, would running 2 1G BOV's prove advantageous...
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1991 Eagle Talon TSi AWD-Ross 8:3.1 pistons, Eagle rods, ACL Race bearings, 2g small port head, HKS/Delta 272 cams, Evo springs/retainers, FP3065 @ 28psi (hopefully), FIC 1550's, Apex'i N1 turbo back exhaust, KYB GR-2's on Suspension Technnique springs, megan sturt bars, poly mounts/bushings

Mr Peepers

  • JACKAL Owner
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  • Posts: 62
  • Matt Morrison
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: HX35
Re: BOV boost limits
« Reply #1 on: February 22, 2011, 04:23:19 PM »
A dodge garage modded 1g BOV will handle as much psi as you can throw at it(within the diaphragm's burst strength) since there will be more force acting on the top diaphragm than pushing up on the plunger.  The diaphragm has more area and will see the same psi while under WOT boost.

The response won't be quite as quick with the bottom port open to atmosphere but you can use a setup similar to a bleeder style MBC to find a happy medium between holding the psi you need and releasing as quick as possible.
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Stock 6 bolt, 272/272, 7 blade HX35 w/ twin scroll manifold, old unknown name top to bottom FMIC, 1200's, single 255, e85, LC-1.

HX35- 10.57@128.9 QTP Auto/10.9@135.9 street tire 28psi
16g-   11.2@123.5 on 23 psi and QTPs
14b-   12.00@115.6 on street tires

1g20g

  • JACKAL Owner
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  • Posts: 148
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: 20g
Re: BOV boost limits
« Reply #2 on: February 22, 2011, 04:27:13 PM »
The modded ones are sapose to handle 30psi if i remember right.
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k272s, eagle rods, mahle pistons, 2ghead, BC springs and retainers, 2g intake, ported 2g mani, arp head and main studs, BS removed. good ol 20g

SOB Racing

  • New Member
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  • Posts: 1
Re: BOV boost limits
« Reply #3 on: February 22, 2011, 07:29:56 PM »
I would just get the Tial.  You can get them on Ebay used for $150 or less.

I messed around with stock, cushed, Turbododge'd modified and finally just with with the Tial.  Everything else always leaked boost.
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Ibbanez

  • WEREWOLF Owner
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  • Posts: 197
    • 1990
    • Talon TSI AWD
    • Motor: 4G63 2.3L (stroked)
    • Head: 1G (large ports)
    • Turbo: FP3065
Re: BOV boost limits
« Reply #4 on: February 22, 2011, 07:31:40 PM »
I currently have been using a greddy RS upto 25 psi and it has held 100% of the time with no problems.  But today I just got my brand new Tial Q 50mm BOV in and Im installing it with my Brand New ETS Race FMIC setup :)  its fabulous :)....
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Built 2.3 and head,shep stage 4 tranny w/ welded center diff, 1000cc inj, fp3065, dnp mani,Magnus v5 Cast IM, meth kit, eboost 2 ebc, ksport pro coilovers, 5Zigen ZR+ 17x8, Hoosier Drag Radials, 10 pt roll cage, and loads and loads of suspension stuff

themadcheshire

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    • 1992
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: 14b
Re: BOV boost limits
« Reply #5 on: February 22, 2011, 07:59:57 PM »
Not quite the boost you plan to run, but i dodge garage modded my 1g bov and its held 21psi no problems for a long time.  I boost leak test at 25, so... Yeah
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In order to make this work, I have to change 2 things;  one of them is the Laws of Physics.  Dammit..

1992 tsi awd, Jackal, JAW, FMIC, 680cc, 3 inch turbo back, 255 walbro, comp clutch and lightweight flywheel,  aem truboost, cyclone manifold.

AlphaVision

  • JACKAL Owner
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  • Posts: 89
  • SolarEclipse
    • 1999
    • Eclipse GSX
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: FP68HTA
Re: BOV boost limits
« Reply #6 on: February 23, 2011, 12:07:01 AM »
Ibbanez - please make sure you video yout BOV. I just love Tial sound!

I have a dodge garage modded bov installed (didn't do it myself - I bought it like that) top end connected to the manifold and bottom one to the turbo boost source. When I do a boost leak test it opens at very low pressure (like 3-4 psi). I am not sure if it is normal when BLTesting?
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99 GS body (Euro spec)
97 GSX drivetrain
91 ECU
6 bolt long block

Faster Mitsubishi club Bulgaria

hakcenter

  • dev team
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  • Posts: 1047
    • 2006
    • Other
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
Re: BOV boost limits
« Reply #7 on: February 23, 2011, 08:57:14 AM »
Quote from: AlphaVision on February 23, 2011, 12:07:01 AM
Ibbanez - please make sure you video yout BOV. I just love Tial sound!

I have a dodge garage modded bov installed (didn't do it myself - I bought it like that) top end connected to the manifold and bottom one to the turbo boost source. When I do a boost leak test it opens at very low pressure (like 3-4 psi). I am not sure if it is normal when BLTesting?

Your not supposed to connect both sources ?? I thought the lower was just for atmosphere ?
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

Kapok6

  • WEREWOLF Owner
  • *
  • Posts: 283
  • 'ello poppet
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: FP3065
Re: BOV boost limits
« Reply #8 on: February 23, 2011, 10:00:02 AM »
Also, witht he Dodge Garage modded BOV, the link to how to setup a quick release feature is no longer valid. Anybody have some simple ideas on how to setup a solenoid system to change to quick release at the flip of a switch?
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1991 Eagle Talon TSi AWD-Ross 8:3.1 pistons, Eagle rods, ACL Race bearings, 2g small port head, HKS/Delta 272 cams, Evo springs/retainers, FP3065 @ 28psi (hopefully), FIC 1550's, Apex'i N1 turbo back exhaust, KYB GR-2's on Suspension Technnique springs, megan sturt bars, poly mounts/bushings

Kapok6

  • WEREWOLF Owner
  • *
  • Posts: 283
  • 'ello poppet
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: FP3065
Re: BOV boost limits
« Reply #9 on: February 23, 2011, 10:00:38 AM »
Quote from: Kapok6 on February 23, 2011, 10:00:02 AM
Also, witht he Dodge Garage modded BOV, the link to how to setup a quick release feature is no longer valid. Anybody have some simple ideas on how to setup a solenoid system to change to quick release at the flip of a switch?

Connecting the lower source is for quick release only.
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1991 Eagle Talon TSi AWD-Ross 8:3.1 pistons, Eagle rods, ACL Race bearings, 2g small port head, HKS/Delta 272 cams, Evo springs/retainers, FP3065 @ 28psi (hopefully), FIC 1550's, Apex'i N1 turbo back exhaust, KYB GR-2's on Suspension Technnique springs, megan sturt bars, poly mounts/bushings

hakcenter

  • dev team
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  • Posts: 1047
    • 2006
    • Other
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
Re: BOV boost limits
« Reply #10 on: February 23, 2011, 10:13:22 AM »
Quote from: Kapok6 on February 23, 2011, 10:00:02 AM
Also, witht he Dodge Garage modded BOV, the link to how to setup a quick release feature is no longer valid. Anybody have some simple ideas on how to setup a solenoid system to change to quick release at the flip of a switch?

Use the FPS controls in jackal, and run extra hoses ?
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AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.

Kapok6

  • WEREWOLF Owner
  • *
  • Posts: 283
  • 'ello poppet
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: FP3065
Re: BOV boost limits
« Reply #11 on: February 23, 2011, 01:17:01 PM »
I never got a chance to start really diving into jackal and utilizing all it's features but I will certainly look into it once I get my car back together.
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1991 Eagle Talon TSi AWD-Ross 8:3.1 pistons, Eagle rods, ACL Race bearings, 2g small port head, HKS/Delta 272 cams, Evo springs/retainers, FP3065 @ 28psi (hopefully), FIC 1550's, Apex'i N1 turbo back exhaust, KYB GR-2's on Suspension Technnique springs, megan sturt bars, poly mounts/bushings

Mr Peepers

  • JACKAL Owner
  • *
  • Posts: 62
  • Matt Morrison
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: HX35
Re: BOV boost limits
« Reply #12 on: February 23, 2011, 03:24:28 PM »
I've pondered over setting up a solenoid to send pressure to the bottom port once you let off the throttle, but I think the problem is how much time it would take to fill the lower chamber(the key thing is response in the first place).  The secret is having the lower chamber already pressurized, but not quite pressurized enough to make it leak when at full boost.  Just get the extra oomph to make it open a little quicker.

Seriously though, with the bottom chamber open to atmosphere it will NOT leak at any psi unless it physically blows the damn thing apart.
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Stock 6 bolt, 272/272, 7 blade HX35 w/ twin scroll manifold, old unknown name top to bottom FMIC, 1200's, single 255, e85, LC-1.

HX35- 10.57@128.9 QTP Auto/10.9@135.9 street tire 28psi
16g-   11.2@123.5 on 23 psi and QTPs
14b-   12.00@115.6 on street tires

AlphaVision

  • JACKAL Owner
  • *
  • Posts: 89
  • SolarEclipse
    • 1999
    • Eclipse GSX
    • Motor: 4G63 2.0L
    • Head: 1G (large ports)
    • Turbo: FP68HTA
Re: BOV boost limits
« Reply #13 on: February 23, 2011, 11:59:55 PM »
So doing the DG mod will hold boost nomatter if the lower port is connected, right? The only difference between open and hooked lower port will be the speed of the release and the boost hold capability will not be affected. Have I understood this correctly?
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99 GS body (Euro spec)
97 GSX drivetrain
91 ECU
6 bolt long block

Faster Mitsubishi club Bulgaria

Kapok6

  • WEREWOLF Owner
  • *
  • Posts: 283
  • 'ello poppet
    • 1991
    • Talon TSI AWD
    • Motor: 4G63 2.0L
    • Head: 2G (small ports)
    • Turbo: FP3065
Re: BOV boost limits
« Reply #14 on: February 24, 2011, 06:09:42 AM »
Quote from: AlphaVision on February 23, 2011, 11:59:55 PM
So doing the DG mod will hold boost nomatter if the lower port is connected, right? The only difference between open and hooked lower port will be the speed of the release and the boost hold capability will not be affected. Have I understood this correctly?

Correct.
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1991 Eagle Talon TSi AWD-Ross 8:3.1 pistons, Eagle rods, ACL Race bearings, 2g small port head, HKS/Delta 272 cams, Evo springs/retainers, FP3065 @ 28psi (hopefully), FIC 1550's, Apex'i N1 turbo back exhaust, KYB GR-2's on Suspension Technnique springs, megan sturt bars, poly mounts/bushings
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