Author Topic: Wideband Lambda Location in exhaust  (Read 9612 times)

Offline Sprocket

  • Hero Member
  • *****
  • Posts: 867
  • BHP: 29
Wideband Lambda Location in exhaust
« on: February 20, 2007, 10:26:20 pm »
Where is the best location for the Wideband Lambda to be located. I have heard that they do not like extreme temperatures above the 800c mark. Thats not too much of an issue as the turbo I am using has a max of around that any way and i will be obviously monitoring the situation with the EGT. Will it reac that temp you ask, well possibly, I intend to use ALS on odd occasions for drag days, the boost will be 15 psi at the max with 9:1 cr so the EGT will be high to start.

Just dont want to burn out these little puppies as they aint cheep to start.

Location options - befor the turbo, imediately after the turbo or in the down pipe some what after the turbo?

Offline rob@vems.co.uk

  • Hero Member
  • *****
  • Posts: 3115
  • BHP: 49
    • VEMS Forum
Re: Wideband Lambda Location in exhaust
« Reply #1 on: February 21, 2007, 09:08:11 am »
The lambda is best after the turbo somewhere in the downpipe that allows the sensor to sit as close to verticle as possible.

Offline BUTRE

  • Jr. Member
  • **
  • Posts: 2
  • BHP: 0
Re: Wideband Lambda Location in exhaust
« Reply #2 on: February 21, 2007, 11:17:28 pm »
The lambda is best after the turbo somewhere in the downpipe that allows the sensor to sit as close to verticle as possible.

Verticle as possible... why?


Offline Sprocket

  • Hero Member
  • *****
  • Posts: 867
  • BHP: 29
Re: Wideband Lambda Location in exhaust
« Reply #3 on: February 21, 2007, 11:27:09 pm »
Well, if i stick it in the down pipe, it will have to be horizontal, though it will be in a vertical length of exhaust.


I think the 'as vertical as possible' it to prevent water gathering in the sensor tip???

Offline rob@vems.co.uk

  • Hero Member
  • *****
  • Posts: 3115
  • BHP: 49
    • VEMS Forum
Re: Wideband Lambda Location in exhaust
« Reply #4 on: February 22, 2007, 08:22:27 am »
Correct, its to stop water issues.

Offline cliffb75

  • Global Moderator
  • Full Member
  • *****
  • Posts: 167
  • BHP: 10
Re: Wideband Lambda Location in exhaust
« Reply #5 on: February 22, 2007, 08:04:08 pm »
Bosch specify vertical +- 80 degrees to stop water collection. Most installations try to be more like 45 degrees minimum. Completely horizontal is a bad idea.

Offline BUTRE

  • Jr. Member
  • **
  • Posts: 2
  • BHP: 0
Re: Wideband Lambda Location in exhaust
« Reply #6 on: February 22, 2007, 08:27:42 pm »
horizontal and vertical to what? the floor or the exhaust pipe where the lambda is bolted to ?


Offline rob@vems.co.uk

  • Hero Member
  • *****
  • Posts: 3115
  • BHP: 49
    • VEMS Forum
Re: Wideband Lambda Location in exhaust
« Reply #7 on: February 22, 2007, 08:29:10 pm »
the floor.

Offline Tony C

  • Hero Member
  • *****
  • Posts: 650
  • BHP: 8
    • Capriracing
Re: Wideband Lambda Location in exhaust
« Reply #8 on: March 24, 2007, 11:20:31 am »
i mounted mine with the nose pointing down slightly, due to the above answer regarding water.

Vems Ecu, Twin Plenum efi and N2o
13.314 @ 104.39 mph (10/06/07 3.9 v8)
Sponsored by: www.caprisport.com & www.interpart.biz
Web site: http://www.capriracing.co.uk

Vems Firmware: V1.1.74

Offline damo_S13

  • Full Member
  • ***
  • Posts: 140
  • BHP: 5
Re: Wideband Lambda Location in exhaust
« Reply #9 on: March 24, 2007, 04:18:20 pm »
i have fitted mine at the bottom of the down pipe. and its at about a 30-40deg angle

damo
building vems 4age with itb powered corolla