Go Back  Offshoreonly.com > Technical > General Q & A
Wideband location in Eickert Headers? >

Wideband location in Eickert Headers?

Notices

Wideband location in Eickert Headers?

Old 09-30-2020, 10:20 AM
  #1  
Registered
Thread Starter
 
Join Date: Dec 2019
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default Wideband location in Eickert Headers?

Good morning!

I'm running a set of KE cast aluminum headers on my 242 with a 489. I'd really like to be able to use my wideband on this setup, but I cannot keep the sensor dry. Right now I have a bung in the tail as close to the end of the header as possible, but it's only about six inches from the end where water mixes in. I've tried a 3" extender and it still gets wet. My question is does anyone know a location on the cast aluminum header that could be drilled and tapped right into the exhaust without going through the water jacket? I have a blower ready to bolt on this engine but without AFR monitoring I'm very hesitant.

Thank you,
Adam
HydroStream6 is offline  
Old 09-30-2020, 12:25 PM
  #2  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 10,617
Received 312 Likes on 163 Posts
Default

Measure from where tailpipe bolts to header and then all the way to end of your exhaust tips. Should be near 18-19 for best performance most 496-540 marine engines with decent cam.
SB is offline  
Old 09-30-2020, 12:54 PM
  #3  
Registered
Thread Starter
 
Join Date: Dec 2019
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SB View Post
Measure from where tailpipe bolts to header and then all the way to end of your exhaust tips. Should be near 18-19 for best performance most 496-540 marine engines with decent cam.
The end of the header / beginning of the tips is only about 7" from my transom. I was hoping someone knew of a location within the header that could be tapped. The only other option I'd have to to extend my tips a foot past the transom and keep them dry to the end, which would look pretty bad.
HydroStream6 is offline  
Old 09-30-2020, 01:17 PM
  #4  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 10,617
Received 312 Likes on 163 Posts
Default

The dimension i am looking for is end of header (where tail bolts to) to end (outside of boat) of tips
SB is offline  
Old 09-30-2020, 01:19 PM
  #5  
Registered
Thread Starter
 
Join Date: Dec 2019
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SB View Post
The dimension i am looking for is end of header (where tail bolts to) to end (outside of boat) of tips
This is about 14", but the last 8" or so is wet.
HydroStream6 is offline  
Old 09-30-2020, 01:45 PM
  #6  
SB
Registered
iTrader: (1)
 
Join Date: Nov 2004
Location: On A Dirt Floor
Posts: 10,617
Received 312 Likes on 163 Posts
Default

That's fine. Slip 5" addt'l temporary hose/pipe on end and see if o2 , in it's current location, still gets wet.
If it still get's wet, my reversion reducing collector length addition did not help you. Has helped some others.
It's more of an exhaust wave tuning length thing, than a water distance thing.
SB is offline  
Old 09-30-2020, 03:23 PM
  #7  
Registered
 
Join Date: May 2010
Location: Red Oak, Texas
Posts: 786
Received 13 Likes on 10 Posts
Default

Is there a location that's too close? I'm doing the turbos. Seems the three 'easiest' locations are a spacer under the turbo where all the exhaust is coming together (maybe 16"?) or a spacer between the turbos and the tails (after the exhaust goes thru the turbo). Last option is of course picking a spot on the tails and welding in a bung that doesn't leak through both the outer and inner tubes, but it would be 20"+ away from the last valve.
CDShack is offline  
Old 09-30-2020, 03:55 PM
  #8  
Registered
iTrader: (1)
 
Join Date: Oct 2013
Location: SF Bay Area
Posts: 2,791
Received 80 Likes on 58 Posts
Default

I had wondered about bungs in those given the extremely long runner length. If you get it sorted out keep us posted.

Im using a 90 bung extender off Amazon with pretty good results. May be worth a shot before taking more drastic steps.



Baja Rooster is offline  
Old 09-30-2020, 04:02 PM
  #9  
Registered
 
Join Date: Oct 2010
Location: Cheboygan, MI
Posts: 1,220
Received 75 Likes on 57 Posts
Default

Did you have to weld together the inner and outer tubes to the O2 bung? Thinking about doing my Lightning headers.

Last edited by ThisIsLivin; 09-30-2020 at 04:05 PM.
ThisIsLivin is offline  
Old 09-30-2020, 05:46 PM
  #10  
Registered
iTrader: (1)
 
Join Date: Oct 2013
Location: SF Bay Area
Posts: 2,791
Received 80 Likes on 58 Posts
Default

Originally Posted by ThisIsLivin View Post
Did you have to weld together the inner and outer tubes to the O2 bung? Thinking about doing my Lightning headers.
How to install oxygen sensor bungs.
Baja Rooster is offline  
The following 2 users liked this post by Baja Rooster:
CDShack (10-01-2020), ThisIsLivin (10-01-2020)

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.