Smallest down pipe for accurate WB02 readings?
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,030
From: Wichita, KS
The more back pressure, the worse the skew. So different boost levels would also have a different variance. Assuming you knew what the actual readings were WOT you could set up the skew in the sensor table. But it would only read correctly at that boost level, and not at idle/cruise. But assuming you knew the exact numbers, instead of adjusting the sensor, you could just change the target AFR in the MAP in those areas. It would be a little work and makes my head hurt thinking about it... I bet an Excel spread sheet could be made up pretty easily by someone with more experience than myself to tell you what AFT to target based on that table. be a lot more economical than that silly $600 box AEM sells.
I don't see why it wouldn't work if you could keep the sensor alive.
The sensors usually publish the pressure skews. This is the LSU4 bosch
I don't see why it wouldn't work if you could keep the sensor alive.
The sensors usually publish the pressure skews. This is the LSU4 bosch
Last edited by Forcefed86; Jan 4, 2021 at 12:04 PM.
On what vehicle and what widebands were being used ? And what pressure/temperatures were you seeing pre-turbo ?.
Can't say I've seen many test two widebands before and after the turbo....simply as almost nobody does because of the known issues. Would be good to see actual data ?
Even those testing...or at least testing and making it public about individual cylinder widebands on a turbo application seem non existent. I did post to RH to do it but it fell on deaf ears. Hell...I even asked a few times for it on even a supercharged application, to no avail. And that'd be an easy test.
Although you would expect each individual runner to read differently than a single collector post turbo anyway. Would be great to see a few tests, both with long runner turbo setups and log manifold setups.
Can't say I've seen many test two widebands before and after the turbo....simply as almost nobody does because of the known issues. Would be good to see actual data ?
Even those testing...or at least testing and making it public about individual cylinder widebands on a turbo application seem non existent. I did post to RH to do it but it fell on deaf ears. Hell...I even asked a few times for it on even a supercharged application, to no avail. And that'd be an easy test.
Although you would expect each individual runner to read differently than a single collector post turbo anyway. Would be great to see a few tests, both with long runner turbo setups and log manifold setups.
The more back pressure, the worse the skew. So different boost levels would also have a different variance. Assuming you knew what the actual readings were WOT you could set up the skew in the sensor table. But it would only read correctly at that boost level, and not at idle/cruise. The sensors usually publish the pressure skews. This is the lsu4 bosch
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,030
From: Wichita, KS
Assuming I knew how to modify the AFR table correctly to match that sensor I'd be set... buuuut I don't. And it makes me go a littel cross eyed thinking about it. I'd also need to get use to the "altered" AFR numbers the WB02 displays and memorize what was correct. Would drive me a bit mad I'm thinking. At first anyway. This is one of those things I'd like to see someone with more time than myself iron out fully... I wish I had the time to dig into it.
Assuming I knew how to modify the AFR table correctly to match that sensor I'd be set... buuuut I don't. And it makes me go a littel cross eyed thinking about it. I'd also need to get use to the "altered" AFR numbers the WB02 displays and memorize what was correct. Would drive me a bit mad I'm thinking. At first anyway. This is one of those things I'd like to see someone with more time than myself iron out fully... I wish I had the time to dig into it.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
No it's for the most part the water/condensation aspect
What most due to combat this is push the O2 sensor operation back until the exhaust is to temp but on the holley we can't do that so
What most due to combat this is push the O2 sensor operation back until the exhaust is to temp but on the holley we can't do that so
TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
Do you need the wideband all the time or just for tuning? Just thinking if it’s for tuning you could run a longer section with the sensor built in. The. Once you are happy / it’s safe you can run the shorter pipes?
Looking at the chassis / car could you not make some AC cobra style down pipes that extend back? Might look pretty cool!
Looking at the chassis / car could you not make some AC cobra style down pipes that extend back? Might look pretty cool!