AEM Wideband ?

[turbotsi90]

Hi guys, I'm thinking about ordering a AEM UEGO wideband gauge for my 90 tsi and was wondering if I replace my stock 02 sensor up front with the new one that the gauge comes with?

Thanks

 

[awdtalontsi1992]

Icarus: The signal going out to the ECU is the same as a "blingy light gauge". Howver the AEM gauge will still read the wideband signal as normal. The white wire is just a filtered analog output.

 

[turbotsi90]

what about the heat? from what I have been reading it is best to put the sensor right after the flex pipe?

 

[delta448]

As far as the AEM one, I would actually recommend against it. I have had bad luck with mine when comparing the reading on it to the wideband used on WORKS' dyno. A friend of mine had a lot of inconsistancies in his wideband as well. I do not remember the details, but I would consider another manufacturer.

Zeitronix's website has the original WB sensor shootout pages scanned right out of the magazine, and from what I've read in the shootout article there, the AEM is unable to read AFR lower than 11:1 and actually went completely offline in the test when they tried to measure a 10.7 AFR for accuracy under boost at mid and high rpms(the AEM is discussed on the second page of the article, click NEXT at the bottom of the linked page). That's fine for N/A engines that run leaner, but turbocharged vehicles need that extra range of lower AFR values at least until you are dialed in.

Before the flaming starts: -I'm not talking from experience here. I've never used an AEM WB. Maybe the AEM is absolutely fine, but personally I'll be a little cautious after reading that article. Someone who uses the AEM please chime in and confirm or deny the low range capability.

are you saying I can put my wideband 02 sensor, where my stock 02 sensor is up front?

I would recommend against putting the sensor in the front position, generally it's too hot for the WB sensors and they burn out very quickly. I'd use the rear location, (as long as you don't have a cat convertor still) the rear sensor is only there to confirm your cat is still in place anyway. WB sensors usually need to sample the exhaust much further downstream where it's cooler, and most dyno facilities actually insert the sensor into the tailpipe from my experience (again let me emphasize: when there's no cat).

 

[VPrime]

My catback exhaust comes with a bung welded in already, but its after my downpipe, could I use that or is that to far?

 

[delta448]

I think that should be okay... as long as you don't have a cat installed. The cat will throw the readings WAY off. Either put it in front of the cat or (as I'd recommend) replace the cat with a test pipe or cat-delete downpipe.

 

[TurboTsiThatFly]

yup, the bungs come in the kit!

We sell them on our site, check us out if you'd like!

free shipping on the widebands
you can find them here


-Brian
Street Tuned Motorsports.com - Rochester NY

You guys have the best price on wideband a/f guages ive seen makes me wanna spend some money

 

[Icarus]

Icarus: The signal going out to the ECU is the same as a "blingy light gauge". Howver the AEM gauge will still read the wideband signal as normal. The white wire is just a filtered analog output.

I have one and have been waiting to install it until I upgrade the exhaust. From the install instructions and what I've read on on the AEM forums it limits the range to NB near stoich readings. But if you have installed it in the stock location and it is working perfectly for you, maybe I will give it a try. Thanks

 

[VPrime]

I think that should be okay... as long as you don't have a cat installed. The cat will throw the readings WAY off. Either put it in front of the cat or (as I'd recommend) replace the cat with a test pipe or cat-delete downpipe.

Yeah my downpipe has no cat
So as long as I have no cat distance doesnt matter (as long as its the 36" away)?

 

[OneLove]

I just ordered a aem uego from stm. I want to mount it in the rear 02 sensor bung. Does anyone else have experience with this? It doesnt read under 11.1?

 

[STM tuned]

You guys have the best price on wideband a/f guages ive seen makes me wanna spend some money

thanks . We keep our prices as low as we can, spend the money when ready!

I just ordered a aem uego from stm. I want to mount it in the rear 02 sensor bung. Does anyone else have experience with this? It doesnt read under 11.1?

It reads under 11.1, reads to 10.0 on the digital part.

 

[delta448]

It reads under 11.1, reads to 10.0 on the digital part.

But is the sensor/controller/display accurate under 11 to 1 AFR?

A digital display can be programmed to show you any value you want, but it doesn't mean it's giving you correct information.

I'm really hoping somebody has some real-world feedback on the accuracy of the AEM compared to a commercial (industry benchmark) sensor. Some good news, AEM's site claims the UEGO is good down to 0.55 lambda... that's under 10 to 1 AFR with most sensors.

 

[OneLove]

By the way stm you guys rock, you had the best prices i could find for the uego.

Im excited to get that in and tune.

 

[STM tuned]

But is the sensor/controller/display accurate under 11 to 1 AFR?

A digital display can be programmed to show you any value you want, but it doesn't mean it's giving you correct information.

I'm really hoping somebody has some real-world feedback on the accuracy of the AEM compared to a commercial (industry benchmark) sensor. Some good news, AEM's site claims the UEGO is good down to 0.55 lambda... that's under 10 to 1 AFR with most sensors.

yea, from what I see from the manual, .683 is an AFR of 10.0:1 So according to AEMs claims its accurate in that range.

http://tunertools.com/prodimages/AEM/manual/AEM-30-4100-AFR-UEGO-instructions.pdf

We've used the UEGO in the shop EVO with no problems, it even held up to alot of C16 abuse. Replaced the sensor once in 1.5 years if I am recalling correctly. Havent let us down yet.

By the way stm you guys rock, you had the best prices i could find for the uego.

Im excited to get that in and tune.

Thanks again . Need anything anytime or have any questions feel free to send me a PM!

-Brian
StreetTuned Motorsports STMDSM.com

 

[delta448]

Brian, thanks for linking up that pdf, some good info there. That is enough to quell my suspicions. I'll assume the shootout pages I linked must be a bit outdated, or else they're just flat out incorrect. I trust AEM when they make a claim.

 

[94cyclone]

Do NOT put your wide band in place of your stock O2 sensor, unless you want to buy a new sensor every year. Turbo charged cars have way too hot EGT's for that. You can use the one welded in to your aftermarket exhaust as long as it's before any cat and at at least a 10 degree angle to the street, otherwise condensation will ruin the sensor.

I've had readings as rich as 10.0 on my AEM. It's never blanked out.

And I'll answer the first question you'll have after you hook it up:
Stock AFR is very near 10/1 so don't freak out and use the phrase "pig rich". Instead buy a 2g maf and an SAFC. Then you can tune!

 

[andy4g63]

The rule of thumb is that sensor should be placed at least 3 lenghts of turbine wheel outlet diameter. So that is roughly 3x2.5=7.5" away from from turbo. I had mine in stock loccation once and it went bad after 1.5 years and now I am on my second one, which is not in the stock O2 housing,but I have custom DP with V-band and it is just about at the same distance. It reads well though, I've seen readings as low as 10.29 AFR in stock location and I am sure these are correct.