Jump to content


Photo

Twin turbo nightmare


  • Please log in to reply
52 replies to this topic

#1 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 26 April 2012 - 5:06 AM

So the 1997 GTB I bought a while back is all together again and driving but lacking a little boost I think. Does anyone know where all the vacuum lines go on the thing. Ive got most done but under the manifold on the left side there is another pressure switch or something which I have no idea where it is connected too as all the diagrams I have found so far doesnt include that thing under the manifold

Any help is very much appreciated
Thanks
Alf
Posted Image

#2 rex-leggy

rex-leggy

    Quad-cam

  • Members
  • 304 posts
  • Vehicles:
    • 1996 gt legacy (v/4 sti)
      1990 bc5 (v4 sti/ possum link, twisted)

Posted 26 April 2012 - 7:15 AM

sounds like the solenoid for the charcoal canister . that shouldn't have any effect on the boost if it is that.
were the lines put back where they came from , could be a missing boost pill
Posted Image

#3 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 26 April 2012 - 8:17 AM

Ah true, what you mean with boost pill, and the lines are hooked up in a way that makes sense from a diagram I found on clubsub but missing one hose going to the secondary dump valve, or u have noticed that the primary turbo has a slight whine but very slight! So hope the turbo hasn't reached the end
Posted Image

#4 rex-leggy

rex-leggy

    Quad-cam

  • Members
  • 304 posts
  • Vehicles:
    • 1996 gt legacy (v/4 sti)
      1990 bc5 (v4 sti/ possum link, twisted)

Posted 26 April 2012 - 9:35 AM

one of the vac lines off the boost solenoid has a restrictor pill in it.
its a small "bead" with a hole drilled into it.

if its not in the correct position in the system then your boost wont be correct.

its been a few years since i played with the twin turbo system so i couldn't tell you which line it goes in but i have this pic of the single turbo system showing where the pill goes in that.s you took off should have the pill in it

one of the line
Posted Image
Posted Image

#5 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 27 April 2012 - 2:53 AM

Thanks for the info will have a look around tonight And see what I find
Posted Image

#6 Reuben

Reuben

    THAT guy...

  • Committee
  • 5846 posts
  • Location:Queenstown / Auckland
  • Vehicles:
    • 1998 Legacy GTB Limited
      1995 Legacy 200T
      1990 Legacy Ti Type-S

Posted 27 April 2012 - 10:42 AM

You have ascertained the motor runs. Now single convert it. Bam! And the dirt problem is gone!

I could probably help you fix the issues mate, as much as I hate TT's, I've gathered a fair bit of info on them... The problem is it's the same shit different day, and I hate them with a passion.

A single conversion on the other hand literally is little more than a turbo swap, fucking easy. If you can pull a motor out of a car, you can perform a single conversion with your eyes closed, and it fucking changes these cars into something else...
Posted Image


<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#7 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 27 April 2012 - 6:25 PM

Single convert has crossed my mind a few times but there could be investing in Boostin wagon just waiting for Monday to hear back from finance company and if all goes well ill have to unfortunately sell the gtb again for cheap to recover costs hence again untill Monday all I wana do is fix but if Monday comes and no success with loan then it'll be a definite single convert
Posted Image

#8 Drunkenmonkey

Drunkenmonkey

    (PM admin for custom title)

  • Contributing Member
  • 3570 posts
  • Location:Papakura Auckland
  • Vehicles:
    • 93 Subaru BC5 RS
      91 Nissan Safari LWB High Roof

Posted 27 April 2012 - 6:25 PM

Don't even need to pull the motor out
Posted Image

#9 Reuben

Reuben

    THAT guy...

  • Committee
  • 5846 posts
  • Location:Queenstown / Auckland
  • Vehicles:
    • 1998 Legacy GTB Limited
      1995 Legacy 200T
      1990 Legacy Ti Type-S

Posted 27 April 2012 - 10:35 PM

Well, if it's to flick it, in order to get boostins red thing, then that changes things!

What codes is it throwing? Even if there has been no CEL, still check them.

Have a look at these:

http://www.veloce.pw...Fs/Solenoid Box[1].pdf

http://www.veloce.pw...rbo_diagram.htm

(this one is for BH, but is mostly the same)
http://www.veloce.pw...on/ttopprt2.htm

If you have code 66, though still worth a look
http://www.veloce.pw...S-TwinTurbo.pdf

http://www.veloce.pw...6 flowchart.pdf
Posted Image


<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#10 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 28 April 2012 - 1:54 AM

Ok so I'm pretty sure it's all up and running pretty sweet problem though is the primary turbo does whine a bit, thinking that turbo might be shot hence lack of power the vacuum houses I was concerned about was exactly what Rex-leggy said they where for, the charcoal canister thingy, so now I think replacing the vf13 will fix my problem, fingers crossed, I use to have the check engine lite on all the time untill I had a brain flash and checked if the wires where still connected for checking fault codes and what do you know, they where lol
Posted Image

#11 Drunkenmonkey

Drunkenmonkey

    (PM admin for custom title)

  • Contributing Member
  • 3570 posts
  • Location:Papakura Auckland
  • Vehicles:
    • 93 Subaru BC5 RS
      91 Nissan Safari LWB High Roof

Posted 28 April 2012 - 3:10 AM

Have you got a boost gauge on it?
Posted Image

#12 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 28 April 2012 - 4:51 AM

Nope it's. Even suggested a few times that I install one to check so will do it and see what it does tomorrow hopefully and report back to ASAP
Posted Image

#13 Reuben

Reuben

    THAT guy...

  • Committee
  • 5846 posts
  • Location:Queenstown / Auckland
  • Vehicles:
    • 1998 Legacy GTB Limited
      1995 Legacy 200T
      1990 Legacy Ti Type-S

Posted 28 April 2012 - 5:08 AM

VF18, 13's are for the pre face lifts, 18's are for the GTB.
Posted Image


<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#14 rex-leggy

rex-leggy

    Quad-cam

  • Members
  • 304 posts
  • Vehicles:
    • 1996 gt legacy (v/4 sti)
      1990 bc5 (v4 sti/ possum link, twisted)

Posted 28 April 2012 - 5:31 AM

was the check engine light flashing or solid when driving? (with the connectors plugged in)
before i converted mine my primary was a touch whiny but from what i found its not uncommon.
Posted Image

#15 Pelvin

Pelvin

    (PM admin for custom title)

  • Contributing Member
  • 2037 posts
  • Location:Auckland
  • Vehicles:
    • 2004 GG9 RXi

Posted 28 April 2012 - 5:42 AM

one of the vac lines off the boost solenoid has a restrictor pill in it.
its a small "bead" with a hole drilled into it.

if its not in the correct position in the system then your boost wont be correct.

its been a few years since i played with the twin turbo system so i couldn't tell you which line it goes in but i have this pic of the single turbo system showing where the pill goes in that.s you took off should have the pill in it

one of the line
Posted Image

Quick question in regards to the pill in a single turbo engine, which way should the pill be facing?
With the large hole facing towards or away from the wastegate actuator?
2000 Impreza WRX Type RA Version 6
1998 Legacy TS Type-R B Spec
1992 Legacy GT BC5 Facelift
Vairous other BD/BE/BC combos
2004 Impreza GG Wagon

#16 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 28 April 2012 - 5:48 AM

VF18, 13's are for the pre face lifts, 18's are for the GTB.


Mmmm yea this one has vf13 on left side which is primary?? So either not original motor or turbo replacement and think the other turbo is vf14 so something has happened somewhere with the car I'd say
Posted Image

#17 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 28 April 2012 - 5:49 AM

was the check engine light flashing or solid when driving? (with the connectors plugged in)
before i converted mine my primary was a touch whiny but from what i found its not uncommon.


Yea it was flashing and yea it's the primary that's whining
Posted Image

#18 Reuben

Reuben

    THAT guy...

  • Committee
  • 5846 posts
  • Location:Queenstown / Auckland
  • Vehicles:
    • 1998 Legacy GTB Limited
      1995 Legacy 200T
      1990 Legacy Ti Type-S

Posted 28 April 2012 - 11:20 AM

Do you have smooth rocker covers, or ribbed covers for her pleasure? If smooth, just replaced turbo most likely, if ribbed, tough luck, you've got an EJ20H-Fail in there...

This isn't certain btw, as rocker covers can be swapped, it's simply "likely" probabilities...
Posted Image


<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#19 Alfred

Alfred

    Boosted!

  • Contributing Member
  • 705 posts
  • Location:Christchurch
  • Vehicles:
    • 1991 Subaru Legacy RS
      1997 Subaru Legacy GTB

Posted 28 April 2012 - 7:23 PM

They are smooth ones on it I'd say it's more likely that The turbos have been replaced at some stage I hope
Posted Image

#20 Reuben

Reuben

    THAT guy...

  • Committee
  • 5846 posts
  • Location:Queenstown / Auckland
  • Vehicles:
    • 1998 Legacy GTB Limited
      1995 Legacy 200T
      1990 Legacy Ti Type-S

Posted 28 April 2012 - 7:31 PM

Probably. Welcome to the joys of twin churbro
Posted Image


<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users