Dave 86 930 Fl

Just a quick update, I installed a new bung just a few inches downstream of my muffler and reinstalled the AFR sensor. I put the car on a chassis dyno earlier in the week and the new location worked out great. All of my AFR numbers matched those recorded by the dyno shop, including idle AFRs.

FYI, this test validates Innovate's installation guidelines ... do NOT install AFR sensor upstream of the turbo.

I included a lowres (phone camera) picture of my car in the dyno room at Irish Mike's in Orlando ... Great folks.

Thanks again for all of your help.

Regards, Dave

Falk930

following this story for a while,
additionally I am using AFR-meter ( Zeitronix)
on another supercharged fun car.

Owning a 930 I realy want to see the AFRs!

The point is, the possible boss or as you say bung
position is very near the turbo.

As I do tube bending and sometimes custum exhaust
production in my company, its normal that my 930
should get a muffler from myself.

Adding all those experiences here,
I am thinking to build my muffler
with AFR sensor option more far from
the turbo.

But there are constructive restrictions
as far as I see currently.

Any ideas from the specialists here?


late night greetings from germany

Falk

LeonardZ

911rudy, That's still pretty close to the turbo no? Did it work out ok?

Falk, I installed the bung counter sunk into the muffler in the entry pipe from the turbo. I was wondering about restrictions in the muffler as well?? hmmmm?

Leonard

911rudy

Leonard,
I have not put the new bung in yet but the location I picked will be on the exit pipe from the muff and between the cold and hot sides of the turbo. The big difference will be that the pipe it will be mounted on will be considerably cooler than the pipe just past the turbo. It will also be in the wind stream which will help a lot. I also plan to shroud the wire and top part of the probe with heat reflective material. I'll post pics as soon as I get the new bung. If you look at my pic above it is not where the red dot is. It is to the left of the dot about ten inches.

Falk930

The sensor is not that restrictive.
Dont worry.

Putting the sensor in mufflers outlet is a smart idea.
I am not sure if data will be exact, but why not?

Further these sensors need operation temperature,
will it still be fine that far from the turbo?
(truly I am not that deep in AFR sensors tecnincs)


Falk

Dave 86 930 Fl

I moved my sensor to the location identified by the red dot in 911rudy's previous post. No issues with excessive heat and as I said in latest post, all AFR readings matched those on independent dyno equipment (LM-1). As a bonus, to remove the sensor, just remove the tailpipe from the muffler and disconnect the sensor ... great for recalibrating the sensor in open air.

Chet 930

I wished I would have read this thread before today. I installed a LC-1 and put the bung between the turbo and muffler. Sensor was toast after a couple of hours . I'll get another bung and sensor and do the same as you folks did.

nathanUK '81 930 G50

Is it broken now the sensor ?

Chet 930

It appears to be per the error code unless I'm missing something.

911rudy

Chet,
I got an error code too but all you have to do is re-calibrate the sensor with the LM-1. If you re-calibrate it and it still gives you an error code, then you have toasted it. My new location works great. Now all I have to do is lengthen the goddam wire!

Chet 930

Actually, the display I was looking at wasnt an error code. It was the rES. I mistook that for an E5 error code. However, something is wrong because my XD-1 isnt even recognizing the LC-1. Everything was working fine and then all of a sudden I looked at the AFR guage and it just had -.-.- across it. I checked again this morning and cant see anything out of line. Both sources have power and the other connections are all sound. The cables appear to be fine. I'm going to order another sensor anyway I guess. We'll see what happens.

Tripster

Chet,
My sensor is 4" from the turbo right before the muffler. I have ran the car while tuning on boost from 2K to 6K rpm several times in a 30 min period and have not had any issues with the sensor. I have, on one instance, had the error code come up, but when I recalibrated it, the code went away all was well.

Dave 86 930 Fl

Chet,

You may want to ask Klaus on the Innovate site if you haven't already, he's been very helpful in getting my setup operating correctly.

Regards, Dave

911rudy

Tripster,
I got the same error code and it cleared after I re-calibrated it. I ran several runs at 1.o bar at WOT last month here in GA.for about 30 minutes before it read an error code. I had my rear bumper on and I had the probe on a big copper heat sink. I don't think you will get 30 min. during the summer in Ala. Plus, every time you have to re-calibrate it you will have to take the bumper off to get to it. If you do get it to work like you have it set up, it makes me wonder why there is so much difference from one car to another. It might be timing, ergo heat if the timing is off.

Chet 930

Thanks Dave. I'm gonna move the sensor and bung. We'll see what comes up. I'll be sure to let everyone know.