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    Thread: Let's talk Diverter Valves

    1. Banned madmax199's Avatar
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      01-31-2011 01:34 PM #1
      The board is a little slow today so I tought I would start a thread about diverter valves(I posted my modified DV on QW a while back but I need to share the love with you guys also)

      I wanted a valve capable of holding 30-35 psi steady while keeping stock driveability, response and staying maintenance free. Yes, I tried aftermarket valves but they have slow release response, even slower recovery and require maintenance.

      Being that I'm a DSM/evo guy and work for Mitsubishi, I decided to use Mitsu's late metal valve found on Evo IX and X for my project. It's a good unit from the get go, offering more release volume, larger and stronger diaphragm than the TT's Bosh unit and capable of holding about 25 psi with slow leak at 17 psi.




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      Uploaded with ImageShack.us


      Uploaded with ImageShack.us


      First thing I did was the old "DSM crushing mod"
      It simply raises the internal spring holding capacity by cruching the top chamber slightly. Preloading of the spring allows the valve to hold boost up to 30+ psi steady.

      Now that the unit is capable of holding boost past 30 PSI, I needed to make it leak free. One way to do so is to drill an external reference port and then seal the factory internal port between the top and bottom of the diaphragm. This makes the valve virtually leak free at psi that the car will never see(45+ tested).

      The modified valve will now be capable of holding boost without any leak, keep the stock like fast release, recover at the turbo's max psi while being surge free. The only thing on the car that need to change is the size of the hoses because the mitsubishi in/out nipples are bigger. To me that was not even an issue as I was already using an evo metal bov/tb pipe because I needed a spot to weld methanol nozzles bungs, so it's plug and play.




      Uploaded with ImageShack.us


      Machined metal plug(no more JB weld)




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      The following is a test on reaction time that a car mag did on various dv on the market.
      What you are looking at is after the release, when the driver heads back to WOT, how quick the valve recovers. All tests were run at 9 psi.

      At the first point of 100% throttle:
      DSM 1G/evo DV = 2 psi
      DSM 1G/evo DV/crushed = 1 psi
      DSM 2G DV plastic = 3.5 psi
      WRX DV = 3 psi
      FD3S DV = 4.5 psi
      R32 GTR DV = 3 psi
      Bosch DV = 3 psi
      A'pexi twin chamber BOV = 4 psi
      Bailey DV = 4 psi
      Blitz super sound BOV = 2 psi
      HKS SSQV BOV = 3.5 psi
      Stratmosphere hyperboost adjustable DV = 4.5 psi
      Vortech race BOV = 3 psi
      Forge piston ram BOV = 5.5 psi
      Forge piston ram DV = 4 psi
      Greddy type S DV = 2 psi
      Greddy type R DV = 3 psi

      Feel free to discuss and give inputs on your experiences on DV on the TT.
      Last edited by madmax199; 04-20-2011 at 04:46 PM.

    2. Moderator PLAYED TT's Avatar
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      01-31-2011 02:46 PM #2
      Hmm the Baily's is that slow. I always thought it was faster than my stock
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      01-31-2011 03:09 PM #3
      Thats great information, and something i'd like to get my hands on.

      Can you explain or show the blocking of the internal hole? That was the only part i didnt follow or grasp.

    4. Member taifighter's Avatar
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      01-31-2011 03:17 PM #4
      I've ran a few. The first aftermarket was the Forge Splitter when I was chipped and I also used it at first when I went BT. The Splitter was a cool idea and worked great @ chipped performance levels but couldn't move the volume once I went BT.

      I went with a 004 but always had flutter at partial throttle lift. WOT lift was ok but still flutteres tward the end of the release. I ran like that for about a year.

      The car started to run funny and I couldn't nail it down. I did a bunch of maintenance and replaced all the common sensors. The car ran better but stumbled at WOT release between shifts.

      Then I got a SSQV.
      Best valve ever.
      No flutter at any time. Went back to recirculating (004 was atmospheric) and it runs great. Plus, with the recirc kit, you don't have the ricer whistle.

    5. Banned madmax199's Avatar
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      01-31-2011 04:08 PM #5
      Quote Originally Posted by wrparrish View Post
      Thats great information, and something i'd like to get my hands on.

      Can you explain or show the blocking of the internal hole? That was the only part i didnt follow or grasp.
      That is what the valve looks like when it's open. I ended up tapping the whole and used a recessed allen bolt for a more solid solution than JB weld.



      Uploaded with ImageShack.us

      Valve mounted with clear hoses to show the reducers/adapters neded to go from 4G63T to 1.8t




      Uploaded with ImageShack.us

      EDIT

      This is what the valve looks like nowadays before shipping. Silicone reducers with metal barb fittings !

      Last edited by madmax199; 08-12-2011 at 08:14 AM.

    6. Banned madmax199's Avatar
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      01-31-2011 04:52 PM #6
      Quote Originally Posted by taifighter View Post
      Then I got a SSQV.
      Best valve ever
      .
      No flutter at any time. Went back to recirculating (004 was atmospheric) and it runs great. Plus, with the recirc kit, you don't have the ricer whistle.
      Altough it may be good at holding boost, If you look at the test it is still a slow ass valve in terms of recovery at 3.5 psi. I personally could not stand a slow responding valve .

    7. Member taifighter's Avatar
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      01-31-2011 05:32 PM #7
      I'm not worried, it's in the middle of the field compared to the other ones on the list. The car runs smoother with it, it sounds good, and gets the job done. I also got it at a great price on closeout scratch n dent because there were a few minor scuffs in the finish.

    8. Member Mantvis's Avatar
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      01-31-2011 06:16 PM #8
      What do u guys think of EVOMS DV'S?
      since i got it not too long ago
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    9. Banned madmax199's Avatar
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      01-31-2011 07:30 PM #9
      Quote Originally Posted by taifighter View Post
      I'm not worried, it's in the middle of the field compared to the other ones on the list. The car runs smoother with it, it sounds good, and gets the job done. I also got it at a great price on closeout scratch n dent because there were a few minor scuffs in the finish.
      it is like you said a middle of the road performer and getting anything at a deal makes it better.

    10. Banned madmax199's Avatar
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      01-31-2011 08:08 PM #10
      Quote Originally Posted by Mantvis View Post
      What do u guys think of EVOMS DV'S?
      since i got it not too long ago
      I have no firsthand experience with it so I can't really comment.

      In general, almost any piston dv from what you can see is going to be lazy in response.

      Also if the valve construction allows for pressurized air to act against the set spring tension it will naturally cause it to crack open(leak) before it is suppose to.
      That early leakage in the valve operation is what I prevented by plugging the reference hole between the two chambers and re-drilling an external boost reference port.

    11. Member taifighter's Avatar
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      01-31-2011 08:35 PM #11
      I had one of those kits on my Talon that took a stock 1g valve and added a line and a box to it. I can't remember the name of the vendor but I sent it out for the service. Its a really cool idea that I've only seen on DSMs

    12. Banned madmax199's Avatar
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      01-31-2011 08:59 PM #12
      Quote Originally Posted by taifighter View Post
      I had one of those kits on my Talon that took a stock 1g valve and added a line and a box to it. I can't remember the name of the vendor but I sent it out for the service. Its a really cool idea that I've only seen on DSMs
      Dejon power tool quick release box?

      Same concept, except that they hook the external boost port that I drilled to a solenoid box making the release even quicker(forced vaccum).

      The problem with that is part throttle is erratic. I drew the line there because venting the external port to the atmosphere is fast enough(less than 1 psi for full recoveries) that I'd deal with that over part throttle issues.

    13. Member taifighter's Avatar
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      01-31-2011 09:05 PM #13
      That's the one.

      That was my first turbo car <3

      I never noticed irratic part throttle tied to the valve, but then again I didn't know as much as I do now so it very well could have left something to be desired

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      01-31-2011 09:31 PM #14
      I run a Greddy Type S on my big turbo motor, but don't recirculate. Going on 5 years now with nary a problem.

    15. Banned madmax199's Avatar
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      01-31-2011 09:48 PM #15
      Quote Originally Posted by 20v master View Post
      I run a Greddy Type S on my big turbo motor, but don't recirculate. Going on 5 years now with nary a problem.
      The Greddy type and the Blitz s s bov are two of the better valves out there. As you can see in the test, they both only needed 2 psi for recovery.

      How is maintenance on it and how does it hold high boost?

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      01-31-2011 10:20 PM #16
      Quote Originally Posted by madmax199 View Post
      Altough it may be good at holding boost, If you look at the test it is still a slow ass valve in terms of recovery at 3.5 psi. I personally could not stand a slow responding valve .

      So how much $$$ to get a madmax DV?

    17. Banned madmax199's Avatar
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      01-31-2011 10:51 PM #17
      Quote Originally Posted by omerkm1 View Post
      So how much $$$ to get a madmax DV?
      It is really not that hard to make but if you insist, I would say the price of the valve and $10 for shipping.

      If you buy the valve (evolutionm.net classifieds is your best) and ship it to me, just paypal the $10 so I can ship it back and voila you got your madmax dv.

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      01-31-2011 11:03 PM #18
      Quote Originally Posted by madmax199 View Post
      How is maintenance on it and how does it hold high boost?
      I haven't opened the thing since I took the cap off to polish off the purple when I got it, and it has held the 32-34 psi I've run on 110 octane a dozen or so times over the years.

    19. Banned madmax199's Avatar
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      02-11-2011 10:26 AM #19
      I am getting several PM and e-mails about the my evo modded DV and how to do it in details. I am going to post the steps here so everyone can have acces to it:

      1) Slightly crush the ceiling of the top chamber.

      Please be gentle and don't go too far, a 1 to 2 mm depression is enough preload on the spring. The best way to do this is to sandwich the valve on a vice horizontally with a socket. (just use a slightly smaller socket on the side you want to crush and go slowly)

      The top of the valve pictured here used to be flat


      Uploaded with ImageShack.us




      2) Drill your 3mm external reference port(you are only opening the original to the atmosphere)



      drill just enough to vent out the hole you are plugging in step 3


      Uploaded with ImageShack.us



      3) Plug the original internal boost reference port.

      JB weld will work but I tapped and plugged it with a recessed head allen screw.


      this hole you are plugging is the one you want to vent by drilling in step 2


      Uploaded with ImageShack.us
      Last edited by madmax199; 02-11-2011 at 10:31 AM.

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      02-11-2011 10:45 AM #20
      You should make up a couple if you have access to the valves for sale. I have been fishing around the evo forum and cant find a 1gen dv for sale. Thanks for the post with pics though....

    21. Banned madmax199's Avatar
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      02-11-2011 10:58 AM #21
      Quote Originally Posted by omerkm1 View Post
      You should make up a couple if you have access to the valves for sale. I have been fishing around the evo forum and cant find a 1gen dv for sale. Thanks for the post with pics though....
      You want EVO X, EVO 9 and EVO MR metal valve, 1st gen valve is the metal valve found on the early DSMs and would require a flange.

      I could easily source a few valves and modify them but I'd only do so if I have prepaid takers lined up.

      I'm not looking to make any profit and I'm just helping the community. If anyone really want a valve, let me know and I will direct you where to find them.

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      02-11-2011 11:16 AM #22
      Quote Originally Posted by madmax199 View Post
      You want EVO X, EVO 9 and EVO MR metal valve, 1st gen valve is the metal valve found on the early DSMs and would require a flange.

      I could easily source a few valves and modify them but I'd only do so if I have prepaid takers lined up.

      I'm not looking to make any profit and I'm just helping the community. If anyone really want a valve, let me know and I will direct you where to find them.

      PM Sent.

    23. Banned madmax199's Avatar
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      02-11-2011 12:04 PM #23
      Quote Originally Posted by omerkm1 View Post
      PM Sent.
      Replied

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      02-11-2011 12:30 PM #24
      Quote Originally Posted by madmax199 View Post
      Replied
      Thanks Max!!

    25. Banned madmax199's Avatar
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      02-11-2011 02:35 PM #25
      Quote Originally Posted by omerkm1 View Post
      Thanks Max!!
      Valve on it's way to me

    26. Banned madmax199's Avatar
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      02-17-2011 01:14 PM #26
      I got a few pm about what else is needed to make my modified valve work on the TT.
      All that is needed is (2) 1" to 1 1/4 couplings, a piece of 1 1/4" hose and hoses clamps.

      This is a picture of omerkm1 valve that's going out today minus the hose(busy at work and didn't get to cut it yet)




      Uploaded with ImageShack.us

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      02-17-2011 02:12 PM #27
      Nice Mitsu anny chair/stool.

    28. Banned madmax199's Avatar
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      02-17-2011 02:39 PM #28
      Quote Originally Posted by 20v master View Post
      Nice Mitsu anny chair/stool.
      Good eyes

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      02-17-2011 02:45 PM #29
      Quote Originally Posted by madmax199 View Post
      I got a few pm about what else is needed to make my modified valve work on the TT.
      All that is needed is (2) 1" to 1 1/4 couplings, a piece of 1 1/4" hose and hoses clamps.

      This is a picture of omerkm1 valve that's going out today minus the hose(busy at work and didn't get to cut it yet)




      Uploaded with ImageShack.us

      Thanks Max!

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      03-11-2011 10:30 AM #30
      Madmax DV is installed and the performance is amazing. The car hits boost quick but also holds it better and less drop between shifts. I would recommend this to anyone that can talk Max into building one for.

      FYI - I am coming from a Forge 007 DV

    31. Banned madmax199's Avatar
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      03-11-2011 11:23 AM #31
      Quote Originally Posted by omerkm1 View Post
      Madmax DV is installed and the performance is amazing. The car hits boost quick but also holds it better and less drop between shifts. I would recommend this to anyone that can talk Max into building one for.

      FYI - I am coming from a Forge 007 DV
      I'm glad you like it

      This thing really rocks, we had tested on an evoX before I sent it to you. The car picked up 4 psi of boost and hit over 320 load from a previous best of 280. We even had to rescale the ecu since mitsu had it only scaled to 320, simply amazing for just a BOV.

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      03-11-2011 09:06 PM #32
      Omer, can you post a picture of the valve mounted. I'd like to see it on car without a dv relocation(if you don't have one). Thanks

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      03-11-2011 09:39 PM #33
      Quote Originally Posted by madmax199 View Post
      Omer, can you post a picture of the valve mounted. I'd like to see it on car without a dv relocation(if you don't have one). Thanks

      Sure thing. Car is back under the knife and I wont be able to post a pic till Monday.

    34. Banned madmax199's Avatar
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      03-11-2011 10:06 PM #34
      Quote Originally Posted by omerkm1 View Post
      Sure thing. Car is back under the knife and I wont be able to post a pic till Monday.
      That's fine, I'm not going anywhere .

    35. Member bvgoosedd's Avatar
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      03-12-2011 09:25 PM #35
      i just seen that the blitz also has a recirculation adapter. what kit do i need to put one on my car. i should be good since i am big turbo. is anyone running one?

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