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  1. #1
    FEP Power Member SchoolBoy's Avatar
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    Default SVO gets new Boost Conroller and Bypass Valve

    So ever since I rebuilt the motor in my svo, and then adding the front mount intercooler two problems have plagued me.

    The first being anything more than 14psi of boost and the car would detonate, pull timing and all around fall on its face. Its clear to me now that this is mainly caused by the head having been cut several times. Now the true remedy for this is either a thicker head gasket or a new head. While I have not had time to do the tear down, I only just recently picked up a back up head. {1-23-18, The real cause was excessive piston to wall clearance that resulted in a full rebuild} So in the mean time I need to just turn the boost down. Doing this with the Gillis bleed valve proved to be tricky as there was no happy medium between 10psi and 14-15. Also the Gillis would do its normal 1-2psi creep. This is when I decided to bite the bullet and buy a electronic boost controller.

    The second problem came up after I built my front mount intercooler in the form of compressor surge and VAM flutter. It was getting so bad that when I lifted from low to medium boost levels on the freeway it would violently shake the whole car. Now I was still using the bypass valve that forced4 used to sell but for some reason it just wasn't venting the boost. I will also say that my placement of the valve probably played a roll in this. Had it been closer to the charge pipe if not directly attached to it this may not have been as big a problem. Either way I needed something far more sensitive and vented more.


    So after doing some digging, a lot of youtube watching and poking around boosted import sites one name popped up a few times....GoFastBits After a few more evenings on the old internet, I could not find any negative reviews or failures of their products with one exception.... GoFastBits is based in Australia so tech support would be through email. I figured I would see if they could recommend a bypass or blow off valve that might fix my surging problem. Well long story short, the tech didn't just say "here use this," he actually wanted to hear my problem to help diagnose the issue. So I sent him two gopro videos that I took from under the hood. With that in hand he told me to use the T9301 bypass valve. http://www.gfb.com.au/products/blow-...ent-bov-by-gfb The key here was that my forced4 bosche bypass needed a pressure difference of 10 points to open vs the T9301 at only 5 points. An example being: if I boost to 3psi and let off, the bosche would need to see a vacuum of 7" before opening, the GFB only needed 2" to open. So I hopped on ebay and picked one up that was for sale in the usa NIB.


    It was very well packed, looked nicely made, and all I had to do was rotate the vacuum nipple by following the instructions.

    20150603_194916_HDR by Judge Dread, on Flickr

    20150603_195035_HDR by Judge Dread, on Flickr


    Compared to the bosche diaphragm valve this uses a metal piston.
    20150603_195038_HDR by Judge Dread, on Flickr

    20150603_195045_HDR by Judge Dread, on Flickr

    20150603_195050_HDR by Judge Dread, on Flickr

    This is after rotating the cap so that the nipple was pointing the way I wanted it.
    20150603_200716_HDR by Judge Dread, on Flickr


    My old Bosche setup...
    20150603_200933_HDR by Judge Dread, on Flickr

    20150603_200941_HDR by Judge Dread, on Flickr
    Last edited by SchoolBoy; 01-23-2018 at 01:39 PM.
    If you blink at the end of the straight away you'll miss the twisties and what fun would that be!
    1982 Capri RS 5.0L
    Suspension Build http://vb.foureyedpride.com/showthre...tion-and-Build
    1985 SVO 2A & leather.
    Motor Build http://vb.foureyedpride.com/showthread.php?t=63505
    Dyno stats and exhaust install http://vb.foureyedpride.com/showthre...Dyno-d-finally
    My FMIC build http://vb.foureyedpride.com/showthre...-amp-D-project
    Electronic boost controller and bypass valve
    http://vb.foureyedpride.com/showthre...d-Bypass-Valve
    Opperation SVO Tunes http://vb.foureyedpride.com/showthre...51#post1148551

  2. #2
    FEP Power Member SchoolBoy's Avatar
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    Default

    A little side by side comparison...

    20150603_201151_HDR by Judge Dread, on Flickr

    20150603_201202_HDR by Judge Dread, on Flickr

    20150603_201210_HDR by Judge Dread, on Flickr


    And finally in place....
    20150603_201830_HDR by Judge Dread, on Flickr

    20150603_201838_HDR by Judge Dread, on Flickr

    20150603_201848_HDR by Judge Dread, on Flickr


    I can say this has cured my surging problem at free way speeds. I no longer need to mash the throttle and lift sharply to made the valve vent. I can simply tip into boost and back off with no problems.
    If you blink at the end of the straight away you'll miss the twisties and what fun would that be!
    1982 Capri RS 5.0L
    Suspension Build http://vb.foureyedpride.com/showthre...tion-and-Build
    1985 SVO 2A & leather.
    Motor Build http://vb.foureyedpride.com/showthread.php?t=63505
    Dyno stats and exhaust install http://vb.foureyedpride.com/showthre...Dyno-d-finally
    My FMIC build http://vb.foureyedpride.com/showthre...-amp-D-project
    Electronic boost controller and bypass valve
    http://vb.foureyedpride.com/showthre...d-Bypass-Valve
    Opperation SVO Tunes http://vb.foureyedpride.com/showthre...51#post1148551

  3. #3
    Moderator wraithracing's Avatar
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    Default

    Nice setup and clean install.

    Glad to hear it cured your surging issue. I will have to remember this for my 84 SVO when I get to this point.

    Trey
    ​Trey

    "I Don't build it hoping for your approval! I built it because it meets mine!"

    "I've spent most of my money on Mustangs, racing, and women... the rest I just wasted."

    Mustangs Past: Too many to remember!
    Current Mustangs:
    1969 Mach 1
    1979 Pace Car now 5.0/5 speed
    1982 GT Awaiting Restoration
    1984 SVO Restoration in Progress
    1986 GT Wrecked by PO, but still want to save!

    Current Capris:
    1982 Capri Roller
    1984 Capri Returned to Bubble Back Glory
    1983-84 Gloy Racing Trans Am/IMSA Body Parts
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  4. #4
    FEP Super Member Travis T's Avatar
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    I'll have to pass this along to a friend who has an 86 SVO. He had the Bosch part on his car and it didn't last any time.
    1984 Mustang GT owned since 1991 (first car). Mercury Mountaineer GT-40P engine, some suspension mods, currently undergoing a five lug SN95 brake upgrade and more suspension mods. Some minor body and interior mods have been done as well.

    2004 GT convertible, 2001 Taurus LX, 1994 F150, 1950 F-1 Ford Pickup

  5. #5
    FEP Power Member SchoolBoy's Avatar
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    Quote Originally Posted by wraithracing View Post
    Nice setup and clean install.

    Glad to hear it cured your surging issue. I will have to remember this for my 84 SVO when I get to this point.

    Trey
    Quote Originally Posted by Travis T View Post
    I'll have to pass this along to a friend who has an 86 SVO. He had the Bosch part on his car and it didn't last any time.
    Its definitely worth the money guys and since our old sources for these kinds of parts are drying up I wanted to get the word out there on this.


    Which brings me to the GFB Boost Controller http://www.gfb.com.au/products/boost...troller-by-gfb. I paid $240 for mine on ebay from a USA seller NIB. But the average price is right at $260ish. That might seam a bit steep compared to a Gillis at $60 but keep in mind that the GFB unit also doubles as your boost gauge. So you don't need to buy a separate boost gauge and pillar pod for about $100 bringing your total to $160ish. The big advantage I have found with using the EBC is I can control how long the waste gate stays shut to aid in spool up. The other two advantages are an over boost setting, and the ability to adjust boost drop off or spiking to keep your curve flatter. If an over boost is detected the unit drops boost back to waste gate pressure till you lift off the throttle. Now there are other controllers out there with even more features such as the turbosmart eboost2 and the greddy profect oled. Both of which carry a price north of $400, just depends on your needs.


    Now I did take a gopro video of my car with the GFB bypass valve installed but while I was still running the Gillis boost valve. Later I will take another one after the GFB Electronic boost controller is sorted out. To see if you can see a difference. Anyways here ya go..... https://www.youtube.com/watch?v=rMOMCphPbqU


    I forgot to take pictures of the unboxing so you get the touch screen head unit, the solenoid, wiring harness, vacuum tubing and T's. I needed to find one tiny bolt and nut to mount the solenoid, and a different T to tie into my vacuum source under the dash. I chose to mount the head unit in the upper left corner of the dash, but my second choice was to hide it down in the ash tray. If you do it right you can close the ash tray door and hide it. The nice thing about mounting the head unit in the upper left corner of the dash is you can bend up a bracket to hold it and there is a screw that holds the dash bezel to the dash pad you can use to hold the bracket. Also there is just enough room to sneak the vacuum hose and wiring harness between the gap of the dash bezel and the dash pad.


    Like this....
    20150605_173507 by Judge Dread, on Flickr



    Now using a cereal box I made a flat panel template of the bracket. When I was happy with the shape I cut and bent it out of a scrap bit of aluminum.
    20150605_173536 by Judge Dread, on Flickr

    20150605_173557 by Judge Dread, on Flickr

    20150605_173616 by Judge Dread, on Flickr

    20150605_173628 by Judge Dread, on Flickr


    This gave me plenty of room to mount the head unit to it...
    20150605_173700 by Judge Dread, on Flickr

    20150605_173717 by Judge Dread, on Flickr


    Not going to lie guys fishing the vacuum tubing and wiring harness up into that little hole in the dash was not fun but doable with a bit of flexible wire and tape.
    20150607_195256 by Judge Dread, on Flickr

    20150607_195330 by Judge Dread, on Flickr


    Now for the solenoid itself I bolted it to the forced4 cold air box. Make sure you set it up correctly based on what kind of waste gate your using because internal and external are different. Also the solenoid needs to be orientated so that the unused port is facing down to keep dirt and junk out of it. As for the wiring harness I feed it through the firewall where the main harness goes through. Then carefully remove the screws and open up the black plastic housing that runs across the top of the firewall that holds all the vacuum hoses and main harness. There is just enough room to lay the new harness for the solenoid in there. Then just feed it over the top of the strut tower and plug it in. Inside the car I connected the power source to my stereo's power source and ground.

    20150607_211234 by Judge Dread, on Flickr


    I rubber banded the head unit to the bracket so I could do some test pulls with it.
    20150607_214215 by Judge Dread, on Flickr



    Something to note here, you can change the colors of the buttons and you can turn the colors off. The down side is that you can not dim the brightness of the unit so I tend to leave mine off. A way around that might be to put some window tint on the display which would also protect it from scratch's.

    20150608_211453_HDR by Judge Dread, on Flickr


    Once I had the bracket where I wanted it I applied sticky Velcro to the back of the display 1st then pulled the protective cover off the other side and stuck it in place. After a while it was ok to pull them apart.

    20150626_153512 by Judge Dread, on Flickr

    20150626_153628 by Judge Dread, on Flickr



    Now here is where you can either primer & paint the bracket with duplicolor hvp 111 like I did or flock it to match the dash bezels. Either way tape over the Velcro to keep it clean.

    20150717_104452_HDR by Judge Dread, on Flickr

    20150717_104457_HDR by Judge Dread, on Flickr

    20150717_132639 by Judge Dread, on Flickr

    20150717_132715 by Judge Dread, on Flickr

    20150717_132728 by Judge Dread, on Flickr



    All done and the red match's the stock gauges really well!
    20150717_132857_HDR by Judge Dread, on Flickr
    If you blink at the end of the straight away you'll miss the twisties and what fun would that be!
    1982 Capri RS 5.0L
    Suspension Build http://vb.foureyedpride.com/showthre...tion-and-Build
    1985 SVO 2A & leather.
    Motor Build http://vb.foureyedpride.com/showthread.php?t=63505
    Dyno stats and exhaust install http://vb.foureyedpride.com/showthre...Dyno-d-finally
    My FMIC build http://vb.foureyedpride.com/showthre...-amp-D-project
    Electronic boost controller and bypass valve
    http://vb.foureyedpride.com/showthre...d-Bypass-Valve
    Opperation SVO Tunes http://vb.foureyedpride.com/showthre...51#post1148551

  6. #6
    FEP Power Member SchoolBoy's Avatar
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    I wanted to drop a little update on this as its been installed now for a few years. Both of these parts are still working wonderfully. I really can't tell you how nice it is to have 6 different boost maps to pick from. I've got one set for a soft hitting 11psi for rainy or poor traction days, one set for aggressive 15psi for summer days, I hope to have one set up for race days at 18psi. But right now I'm using the soft hitting 11psi for my break in on the new motor.


    Towards the end of the year I hope to vacuum form a tinted cover to go over the face of the control unit to cut down on the brightness at night.
    If you blink at the end of the straight away you'll miss the twisties and what fun would that be!
    1982 Capri RS 5.0L
    Suspension Build http://vb.foureyedpride.com/showthre...tion-and-Build
    1985 SVO 2A & leather.
    Motor Build http://vb.foureyedpride.com/showthread.php?t=63505
    Dyno stats and exhaust install http://vb.foureyedpride.com/showthre...Dyno-d-finally
    My FMIC build http://vb.foureyedpride.com/showthre...-amp-D-project
    Electronic boost controller and bypass valve
    http://vb.foureyedpride.com/showthre...d-Bypass-Valve
    Opperation SVO Tunes http://vb.foureyedpride.com/showthre...51#post1148551

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