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Currently running a tired 350 with rear exhaust and was going to go bigger with side pipes. I was looking at the holley efi sniper kit and was curious if anybody has run an O2 sensor with side pipes? Curious if there were pictures of where the sensor was and if heat shields could still be used. Shop was saying you wouldn't see the wire but from my recollection of side pipes on these cars I'm not sure where you would hide it. Any input is appreciated. Thanks!
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Most folks install the o2 sensor in the sidepipe collector. The sensor may not be at an ideal angle so it may or may not have problems with condensation draining from the sensor tip.
Most folks install the o2 sensor in the sidepipe collector. The sensor may not be at an ideal angle so it may or may not have problems with condensation draining from the sensor tip.
Thanks for the reply. I was thinking that's where it would go but in watching Holly's install video it seems like it would cause problems with being too close to where all four connected and the angle was a concern as well. I'm not opposed to carb but the idea of better reliability and potentially easier tuning was leading me that way.
There have been some threads/posts on here where guys mounted it into the driver's side of the collector just before the side pipe itself. They mounted close to the frame sloping slightly upward so not to have condensation accumulate on it. Best to fully install the headers and mark the sensor spot and then pull back off to weld in a bung to mount it.
You might try the "advanced search" under search drop down menu and plug in "O2 sensor and sidepipes" for more info.
I'll be doing the same thing when I finally get mine together.
Putting in an AFR gauge until I decide if carb or EFI.
Good luck.
There have been some threads/posts on here where guys mounted it into the driver's side of the collector just before the side pipe itself. They mounted close to the frame sloping slightly upward so not to have condensation accumulate on it. Best to fully install the headers and mark the sensor spot and then pull back off to weld in a bung to mount it.
You might try the "advanced search" under search drop down menu and plug in "O2 sensor and sidepipes" for more info.
I'll be doing the same thing when I finally get mine together.
Putting in an AFR gauge until I decide if carb or EFI.
Good luck.
Sorry I should have said I was looking at Hookers or Dougs, where the collector is outside the frame/body of the car. I may not be able to use that style with an O2 sensor. I had seen a picture of some that had it just sticking straight out next to the vent, was not a fan. https://www.corvetteforum.com/forums...s-and-efi.html . The link you gave is helpful with the stock side pipes offered.
Sorry I should have said I was looking at Hookers or Dougs, where the collector is outside the frame/body of the car. I may not be able to use that style with an O2 sensor. I had seen a picture of some that had it just sticking straight out next to the vent, was not a fan. https://www.corvetteforum.com/forums...s-and-efi.html . The link you gave is helpful with the stock side pipes offered.
I understood what you meant. I have a set of Doug's side pipes myself.
The link I showed was just to show how to search for info using words; side pipes, O2 sensor.
Here is a better answer to your question that I was involved with.
My setup. 496 BBC with FAST XFI 2.0. We installed the bungs in the actual sidepipes. I have bungs on both sides, previously for wideband AFR. Now just using driver's side for the EFI. Angle is not ideal but since the sensor is heated, I have not had any issues.
My setup. 496 BBC with FAST XFI 2.0. We installed the bungs in the actual sidepipes. I have bungs on both sides, previously for wideband AFR. Now just using driver's side for the EFI. Angle is not ideal but since the sensor is heated, I have not had any issues.
Thank you. Exactly the images I was looking for. Since the plug is heated, you havent burnt any out due to condensation? It doesnt appear to be to hard to change either way.
Thank you. Exactly the images I was looking for. Since the plug is heated, you havent burnt any out due to condensation? It doesnt appear to be to hard to change either way.
I did swap the sensor last year because I was having AFR issues (reading lean). But that may have been due to the fact that my alternator was bad and voltage was low. XFI is not tolerant of low voltage. More of a precautionary swap. Never ran the old sensor with the new alternator. Just about the 5 year mark.
I did just discover that FAST uses an NGK sensor that is common with Honda’s so replacements is the future will cost $95 vice $240. FAST just repackages it.
I run a fitech system with a set of Stahl headers and sidepipes. I like them because the collector is still under the car before exiting to the side. I'll take some pics of the location.
My hooker side pipes have a bung on each side just like Steve G but on the collector a few inches forward. They can’t be straight and need to angle down about 30 degrees as he has them due to the frame. Mine are at nearly an identical angle. Don’t weld the bung in without the pipes on the car. Likely to get the wrong angle.
Last edited by Corvettedave02; Dec 9, 2019 at 10:24 PM.
I have mine in more or less the same spot as SteveG75. I have run the car hard (including track days) for over a year and haven't had to replace due to condensation or anything.
In regards to the note about being too close to the collector... I do agree that this isn't ideal, but its about the best we can get, and frankly its probably "good enough".
I did just install O2 bungs in each primary and in the spring plan to check each cylinder relative to the main collector sensor, but frankly this is overkill.
Side pipes with EFI?
FAST just repackages it.
