Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
tj930's Avatar
 
Join Date: Jun 2008
Location: England
Posts: 301
Wideband AFR sensor location

Guys,

What's the consensus for locating the sensor's boss on the exhaust system?

On PET, the 964 turbo has the Lamda sensor located somewhere on the exhaust pipe the 'wastegate' is mounted. I've seen a couple of guys here position the sensor on the top of the turbo-muffler coupling (but it's particularly hot here and I've seen some relocate to the muffler's bottom pipe).

Which is reckoned to be best? (Does one need a heat shield to stop the sensor baking in the turbocharged-exhaust-pipe sun?)

Last edited by tj930; 11-13-2009 at 02:56 PM..
Old 11-13-2009, 01:46 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Join Date: Mar 2000
Location: Auburn,In. U.S.A.
Posts: 2,449
tj,

The general opnion will pobably tell you 6-10 inches from the turbo outlet at the 2 or10 o'clock position and preferably with a heatsink and shield.
Also your configuration will depend on your exhaust system , zork or
muffler and tail pipe.

Cole
__________________
Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 11-13-2009, 02:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
mark houghton's Avatar
 
Join Date: Jul 2008
Location: Central Washington State
Posts: 3,776
+1 as Cole stated.

For my application, there was too short a space between the muffler and turbo outlet to get far enough away from the turbo and not cook the sensor. So, I installed mine in the tailpipe as close to the muffler as possible....probably 10 inches away from the tip. Works fine, the only risk being that at a standstill and stiff tail wind, you may get some ambient air getting in and causing a false high reading. But I haven't seen that happen.
__________________
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-13-2009, 02:46 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
This where Innovate tech support told me to mount mine.



I get good stable readings and I also have a 2000 deg. heat shield on it.
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go!
76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3
76 Blazer also restored by me
Old 11-13-2009, 02:49 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
tj930's Avatar
 
Join Date: Jun 2008
Location: England
Posts: 301
Thanks, guys - so, close enough to the action (but WITHOUT getting melted)?

Gsmith, my car's muffler is pretty similar to yours - I see that you've located the sensor nearer to the cold side of the turbocharger, but it's still going to be pretty, damn hot there! (I can see why a heat shield would be a really good idea.)

David and Mark - thanks and I hope you're both returning to full strength and peak physical condition very soon. ("Tiptronic?" splutter... cough.. Get well, Cole, and then help kick his behind for even suggesting such a thing! )

Last edited by tj930; 11-13-2009 at 03:16 PM..
Old 11-13-2009, 03:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Mar 2000
Location: Auburn,In. U.S.A.
Posts: 2,449
tj,

Innovate also makes a great heat sink for mounting to the bung. The EGTs on
a 930 are really brutal and sensors burn up fast without adequate precautions. I
ran my LM-1 hard wired in the car but only use it to power my digital dash display. When tuning or periodic AFR and system checking I reinstall the WB02 and run some data and then remove it. If your not doing track work that's the way to go.

Cole
__________________
Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 11-13-2009, 03:25 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
They also suggested the 1 inch bung I'll see if I have a pic with the heat wrap. I found one.
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go!
76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3
76 Blazer also restored by me
Old 11-13-2009, 03:25 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
sjf911's Avatar
 
Join Date: Dec 2006
Location: Idaho
Posts: 5,624
Garage
Yup, I've already burned up two sensors running them next to the turbo. One of my projects this winter is to get a bung welded on the pipe beyond the muffler. I have a RarlyL8 muffler so there is room on the right hand side where it will get more airflow and be away from the turbo completely.
__________________
Steve
Sapere aude
1983 3.4L 911SC turbo. Sold
Old 11-13-2009, 04:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
OFF THE BOOST PIPE NOW...
 
A930Rocket's Avatar
 
Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 7,413
^^^ +1. I've burned up several as well at the track. Happens a lot when I blast of out of the pits. It just goes into some error mode and it's no good after that. That's with a zork.

For the street, I need to move it to the outlet portion of the muffler like above and use my heatsheild.

Last edited by A930Rocket; 11-14-2009 at 06:21 PM..
Old 11-13-2009, 07:17 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Manassas, VA
 
lucittm's Avatar
 
Join Date: Apr 2007
Posts: 1,211
Garage
I installed a catalytic converter bypass pipe for "test purposes only". I have already done the air injection delete so I don't need this threaded fitting. With some delicate drilling and tapping, I was able to get a WB02 sensor threaded inside the male M22x1.5mm fitting (so now it is a hermaphrodite fitting?) midway between the turbo outlet and the muffler. Here is a picture of the fitting on the bypass pipe:


Mark
__________________
1991 964 Polar Silver Metallic Turbo Coupe
Old 11-13-2009, 07:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered User
 
Join Date: Mar 2000
Location: Auburn,In. U.S.A.
Posts: 2,449
tj,

Thanks for the kind words and the "OLD ONE" is just great.

Cole
__________________
Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.

Last edited by cole930; 11-14-2009 at 06:00 AM..
Old 11-13-2009, 09:07 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
Turboo934's Avatar
 
Join Date: Jul 2007
Location: Taoos New Mexico
Posts: 668
What if you're running a zork?
Old 11-13-2009, 09:14 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
use a heat sink
Quote:
What if you're running a zork?
Old 11-14-2009, 08:06 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Registered User
 
Join Date: Mar 2000
Location: Auburn,In. U.S.A.
Posts: 2,449
g,

Great idea with the heat sock, Nice install.

Cole
__________________
Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 11-14-2009, 02:26 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
thanks time will tell if I did good
__________________
" Porsche there is no substitute" I always liked that saying. Air cooled is the only way to go!
76 911 C.R.A.P. Gruppe #2 BIG time TURBO C.R.A.P. Bitz EFI/EDIS Now MegaSquirt 3
76 Blazer also restored by me
Old 11-14-2009, 05:10 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #15 (permalink)
Registered User
 
Join Date: Apr 2007
Location: Auckland, New Zealand
Posts: 42
Garage
Sensor placement reply

I attached my sensor at the end of the muffler and it is connected to a XD-16 gauge on the dash. This works well and was straightforward to connect.



Old 11-14-2009, 10:32 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #16 (permalink)
Registered User
 
Join Date: Apr 2007
Posts: 394
When I bought my NGK wide band setup they recomend installing the 02 sensor 10 times the dia. of the exhaust system from the end (ie. 3' pipe = 30"), to insure false readings from air being sucked back in the end.
Old 11-15-2009, 05:38 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)
Happiest when Tinkering
 
gsmith660's Avatar
 
Join Date: Jun 2007
Location: Missouri
Posts: 4,175
I'm thinking I will mount a temp sensor on the heat shield and run it then move it inside and see how hot it gets if it warm enough I might do this soon.
Old 11-15-2009, 08:31 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #18 (permalink)
Registered User
 
tj930's Avatar
 
Join Date: Jun 2008
Location: England
Posts: 301
Quote:
Originally Posted by john930 View Post
That's a very innovative approach - I hadn't considered that!
Old 11-15-2009, 11:29 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #19 (permalink)
Registered User
 
Join Date: Apr 2007
Location: Auckland, New Zealand
Posts: 42
Garage
Thanks, I have an LM-2 and can connect it to this and can log AFR's, boost and rpms.
Old 11-15-2009, 11:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #20 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 12:28 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.