Bosch 13111's good or not?
10-16-2007, 11:34 PM
#1
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Bosch 13111's good or not? I recently purchased the vette sensors a few months back for my LT install. However now I'm starting to see alot of stuff about not being able to tune with them. Any truth to this? Did I make a bad purchase?
10-17-2007, 07:09 PM
#5
I had problems with my bosch o2's. I switched to new acdelcos and the problems went away. Read the thread on bosch sensor switching.
With longtube headerrs, the three fin bosch sensors do not "switch" corectly, its something to do with the surface area. The ac delcos have 6 fins.
With the bosch, you can just cut a few more grooves or widen them a little and they'll work fine with the long tube headers.
I found this out the hard way with my slp longtubes. Whenever it would rain, the headers would cool off to much for the o2s to properly switch.
My advice woul be to get a refund and get the 6 fin acdelcos, if that's not an option, get a dremel or flat head screw driver and make some more surface area on your bosches.
With longtube headerrs, the three fin bosch sensors do not "switch" corectly, its something to do with the surface area. The ac delcos have 6 fins.
With the bosch, you can just cut a few more grooves or widen them a little and they'll work fine with the long tube headers.
I found this out the hard way with my slp longtubes. Whenever it would rain, the headers would cool off to much for the o2s to properly switch.
My advice woul be to get a refund and get the 6 fin acdelcos, if that's not an option, get a dremel or flat head screw driver and make some more surface area on your bosches.
10-17-2007, 07:30 PM
#6
I had problems with my bosch o2's. I switched to new acdelcos and the problems went away. Read the thread on bosch sensor switching.
With longtube headerrs, the three fin bosch sensors do not "switch" corectly, its something to do with the surface area. The ac delcos have 6 fins.
With the bosch, you can just cut a few more grooves or widen them a little and they'll work fine with the long tube headers.
I found this out the hard way with my slp longtubes. Whenever it would rain, the headers would cool off to much for the o2s to properly switch.
My advice woul be to get a refund and get the 6 fin acdelcos, if that's not an option, get a dremel or flat head screw driver and make some more surface area on your bosches.
With longtube headerrs, the three fin bosch sensors do not "switch" corectly, its something to do with the surface area. The ac delcos have 6 fins.
With the bosch, you can just cut a few more grooves or widen them a little and they'll work fine with the long tube headers.
I found this out the hard way with my slp longtubes. Whenever it would rain, the headers would cool off to much for the o2s to properly switch.
My advice woul be to get a refund and get the 6 fin acdelcos, if that's not an option, get a dremel or flat head screw driver and make some more surface area on your bosches.
Here is a picture of them:
10-18-2007, 11:50 AM
#7
Hey guys...
I said it wasn't an every-case deal, but overall, switching problems due to heat loss seem to be almost always worse with the stainless headers. Some of them just switch more slowly down low, and some will do it to the point that they set a code. Coated headers seem to have this issue to a much lesser extent.
As for the Delco comment, I HAVE seen the 13111s consistenly work better in LOTS of cars, so it is hard to swallow. When I say a lot I mean several dozen.
I said it wasn't an every-case deal, but overall, switching problems due to heat loss seem to be almost always worse with the stainless headers. Some of them just switch more slowly down low, and some will do it to the point that they set a code. Coated headers seem to have this issue to a much lesser extent.
As for the Delco comment, I HAVE seen the 13111s consistenly work better in LOTS of cars, so it is hard to swallow. When I say a lot I mean several dozen.
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10-19-2007, 04:16 PM
#8
go ask a GM tech or anyone that knows wtf their taking about, or read the SLOW OXYGEN SENSOR thread.
if you dont have enough back pressure, YOUR BOSCH O2's WILL NOT SWITCH PROPERLY END OF ******* STORY
I think tr6 might have something to do with it too, thats just speculation
Last edited by sobaka__79; 10-19-2007 at 04:23 PM.
