Author Topic: Wastegate hoses and fittings.  (Read 11015 times)

0 Members and 1 Guest are viewing this topic.

Offline Recklessrob

  • Turbo Street Outlaw
  • *******
  • Posts: 5112
  • PSI: 3
    • View Profile
Wastegate hoses and fittings.
« on: August 04 2006, 10:16:51 PM »
This is something frequently overlooked and
mis-installed, So I made a simple diagram that
you can download for reference.
....also because 1turbo6 requested it. :prayer:
Rob

Offline sun dog

  • Turbo Street Modified
  • *****
  • Posts: 393
  • PSI: 0
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #1 on: August 05 2006, 12:12:45 AM »
Nice tech work!  :prayer:
 
When I got my second GN I spotted they had the lines backwards on the "y".
Nuke Gay Whales For Jesus

Offline Turbogn86

  • Turbo Street Modified
  • *****
  • Posts: 422
  • PSI: 0
    • View Profile
Wastegate hoses and fittings.
« Reply #2 on: August 07 2006, 01:30:22 AM »
i have looked for that pic amany of time, but i have it memorized now... lol   only took me 4 yrs to memorize it.
86 GN-sold
87 WE4 (Daily Driver)

Offline Recklessrob

  • Turbo Street Outlaw
  • *******
  • Posts: 5112
  • PSI: 3
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #3 on: August 07 2006, 01:47:39 AM »
I had a diagrm of it saved somewhere. But I couldn't
find it, so I made one...
Rob

Offline dennisL

  • Bone Stock
  • **
  • Posts: 44
  • PSI: 0
  • High On Boost
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #4 on: August 22 2012, 10:58:55 AM »
Forgive my ignorance, but I don't see a link to the diagram.  (I suspect it went away over time, but this is the Knowledge Base section;  It should always be here.)
'87 GN (original owner)
'70 Buick Electra 225 Convertible
'69 Camaro ZZ502

Offline gnonyx

  • Turbo Street Modified
  • *****
  • Posts: 505
  • PSI: 0
  • Boost n00b
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #5 on: August 22 2012, 12:49:56 PM »
I don'y know if Recklessrob was going to post the same photo as I did, but here it is.
 
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline Just a Six?

  • OK Now who Farted??
  • Turbo Street Eliminator
  • ******
  • Posts: 1252
  • PSI: 2
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #6 on: August 22 2012, 02:14:58 PM »
All mine are Grey? With the .050 orfice Black ones how will that change the boost?
Lower? Higher?  :chin:
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9882
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Wastegate hoses and fittings.
« Reply #7 on: August 22 2012, 03:01:06 PM »
Mine were originally gray.  The smaller hole causes higher boost by my logic.  As I recall, which is not all that good these days, the smaller holed versions were replacements sold over the counter and caused too much boost on a stock car....the originals were somewhere between .046" to .050", I think.
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline earlbrown

  • Turbo Street Eliminator
  • ******
  • Posts: 1571
  • PSI: 6
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #8 on: August 22 2012, 03:32:17 PM »
Odd. For some reason I was thinking the restrictor went on the solenoid side. My screwy logic was so that it couldn't dump too much wastegate signal.

I guess I need to go flip mine around and CAREFULLY see what it does to boost.
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9882
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Wastegate hoses and fittings.
« Reply #9 on: August 22 2012, 03:35:02 PM »
LOL  restrictor goes to the compressor port
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline dennisL

  • Bone Stock
  • **
  • Posts: 44
  • PSI: 0
  • High On Boost
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #10 on: November 01 2012, 11:26:50 AM »
I was looking at some old files and found one regarding the wastegate "Y" hose.  Thought it should be here instead of on my Windows 98 Pentium II computer.   :icon_lol:


Since GM made Y-hoses with two different size orifices, you can determine the correct one by it's color (black tee is good, grey not good) but the best way is to strip the insulation from one of the wires in 14-2 Romex electrical wire.  Push the solid conductor 14 awg wire into the straight side of the "Y" fitting.  It should pass through.  If it doesn't, the orifice is the wrong size and should be replaced.


'87 GN (original owner)
'70 Buick Electra 225 Convertible
'69 Camaro ZZ502

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9882
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Wastegate hoses and fittings.
« Reply #11 on: November 01 2012, 11:48:05 AM »
Not too sure about that, Dennis. I have heard that more than once, but, both my cars came with gray "Y"s and they were the correct orifice size :)

The orifice size on the originals was 0.045-0.050"

Some, if not all, of the replacements were smaller...some where around 0.035" which caused overboost when aiming for the stock boost levels with a working wastegate solenoid.
« Last Edit: November 01 2012, 11:53:44 AM by Steve Wood »
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline Steve Wood

  • Turbo Street Outlaw
  • *******
  • Posts: 9882
  • PSI: 34
    • View Profile
    • http://www.vortexbuicks-etc.com/
Re: Wastegate hoses and fittings.
« Reply #12 on: November 01 2012, 11:23:33 PM »
Googling found this   http://www.turbobuick.com/forums/threads/wastegate-y-restrictor-orifice.344019/

Not sure if John every bought one of these new, but, if anything, he got it backwards this time  :)
Steve Wood

http://www.vortexbuicks-etc.com

A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline dennisL

  • Bone Stock
  • **
  • Posts: 44
  • PSI: 0
  • High On Boost
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #13 on: November 08 2012, 11:46:36 AM »
I only included the "black/grey" thing because it was in the drawing from a previous post.  Back in 89/90 when the smaller holes were discovered, we didn't pay much attention to the color but I did keep a foot of 14 awg solid wire in my tool box to check the fittings.
'87 GN (original owner)
'70 Buick Electra 225 Convertible
'69 Camaro ZZ502

Offline Turbodave

  • Bone Stock
  • **
  • Posts: 89
  • PSI: 0
    • View Profile
Re: Wastegate hoses and fittings.
« Reply #14 on: November 12 2012, 07:47:50 AM »
I only included the "black/grey" thing because it was in the drawing from a previous post.  Back in 89/90 when the smaller holes were discovered, we didn't pay much attention to the color but I did keep a foot of 14 awg solid wire in my tool box to check the fittings.

I'm not sure where this black/gray thing came from.  I've got two GN's and my 87 still has its original grey Y in place.  I also still have the original gray Y from my 86 (I'm the original owner) here also.  NEVER seen a GN with a black Y.  Don't know what color the TTA's originally came with, but I do know the GN's (at least the 86/87's) came with gray.
TurboDave EWCS(SW) USN (Ret.)
Sevierville, TN
Translator Pro;  MAFless fuel, spark, boost and fuel pump management

86 GN(Translator Pro/Extender Pro/w Boost control, PLX WBO2 (original owner)

 

SimplePortal 2.3.7 © 2008-2024, SimplePortal