What? They are mounted in the manifold, same as anything else. And they are pre-WG. This "post-WG pre-turbo" situation you mention would be impossible lol.
Post Turbo Primary O2 Sensors
- Thread starter Jake@MHD
- Start date
What? They are mounted in the manifold, same as anything else. And they are pre-WG. This "post-WG pre-turbo" situation you mention would be impossible lol.
Obviously not after the actual wastegate, but where it mounts. It seems like a lot of O2 setups are either in the runners before where the WG mounts, or in some cases on the down pipe still. I just wasnt sure if there was an advantage to the positioning or not because I dont recall seeing them in that spot before.
And when you have special access to fun stuff from @jyamona
I've seen several ST builds on FB where people still stick them in the DP. I know they're custom fabricated DPs, but they're still out there. I suppose from the (lack of) answers to my question, the answer is a resounding "no" but nonetheless this looks like an awesome kit.
Care to share pics, because Jake and Chris are the ones developing the software to allow the N54 to run post turbo O2s.
I don't have them saved nor do I feel like digging through the 10,000 posts in the several different N54 groups, but I have no reason to lie lol. I can vividly recall at least two top mount setups with o2s in the down pipes. Maybe they used JB4s rather than MHD or maybe their AFR readings were just off, but I can certainly say I've seen it.
Are you sure you weren't just looking at the secondary 02s? There have been a few manifolds made the way you describe it, none of them run properly with the stock dme. At least until recent history. A short, completely off-topic history:
VIP Tuning - The first single turbo:
ar design - An ex employee sent these to me and I waited to leak them until the day of their announcement(because I'm so nice):
HPF - Before they went out of business:
ScrotchieMcBoogerBalls - Username was Unfor, manifold by CP-E if I remember correctly
ETS also had a manifold in development at one point. I've been around long enough to see a few come and go, so if I'm ever skeptical about new products, perhaps this is why.
What is the point of this other than easier manifold design and longer lasting 02s?
I guess I am not sure of the value given how old this platform is and how many solutions are on the market.
With sensors in the manifold, they really should be calibrated for the temp/pressure your car sees using an external wideband. Chris and I did this to get a "average usable" data set for the ADV sensors. However, moving them to the DP will give more accurate readings for stock / NTK sensors for sure. This plus the two reasons you mention. Longer lasting + cheaper o2's.
This is super interesting, thanks for the pics.Are you sure you weren't just looking at the secondary 02s? There have been a few manifolds made the way you describe it, none of them run properly with the stock dme. At least until recent history. A short, completely off-topic history:
VIP Tuning - The first single turbo:
View attachment 24427
ar design - An ex employee sent these to me and I waited to leak them until the day of their announcement(because I'm so nice):
View attachment 24428
HPF - Before they went out of business:
View attachment 24429
ScrotchieMcBoogerBalls - Username was Unfor, manifold by CP-E if I remember correctly
View attachment 24430
ETS also had a manifold in development at one point. I've been around long enough to see a few come and go, so if I'm ever skeptical about new products, perhaps this is why.
I'm not afraid to admit I could have been mistakenly seeing just rear o2s I guess, but I could have sworn at the time it was mentioned the DPs had the main o2s in them. Oh well, admittedly my memory isn't the greatest in the world and we all have our dumb moments.
As a side note since we have an entire thread dedicated to this now, what is it that makes it so difficult on ST setups to run the main sensors anywhere other than pre-turbo?
Similar threads
