I figured you picked the 30-5130 because it's analog, it's a decent gauge and for basic AFR data will serve you well. It does look a bit more period correct in our cars.

02 sensor enabled for modified 3.2 ? - or not?
 

excellent thread

fwiw - Steve Wong told me to run an 02 sensor with his chips, even if only on one header bank, cuz they are all enabled for it & the exhaust will run cleaner & the fuel economy a bit better even if only reading one bank ????

i have an AEM 30-4100 in box, that i b'ot a couple yrs ago - it DOES have a selectable narrow-band output range for the white wire, but mention of connecting that to an existing oem sensor circuit is obtuse - this thread helped a lot with that issue (i.e., DME)

it is not clear from the above posts whether the AE's "simulating" the oem signal is the same as providing the constantly variable signal from the Bosch 02 sensor ?????? :confused:

- the 4100 is a 4.2 sensor, otherwise "cosmetically same as the 4110 - the instructions say that the UEGO calibration resistor eliminates the need for "free air" calibration

after reading this thread, since i already own it, I will am installing it on my 3.2 (headers, no CAT, Wong chip, with vertical bungs in both pipes), -

Nice read on the difference between LSU 4.2 and 4.9 sensors, you really want a 4.9 sensor based gauge.
Bosch LSU 4.9 is superior to LSU 4.2 sensors - ECOTRONS

DLG-1: Dual Lambda (Air/Fuel Ratio) Gauge
(Includes: Bosch LSU 4.9 sensors)

a new option that some might like

DLG-1 Dual Lambda Gauge

which sensor used in oem 84-89 carrera?
 

an interesting read,

suggesting the LSU4.9 did not show up until mid 2000's (2007 up) - it begs the question: what sensor was used oem for the '84-'89 911?

was it a 4.2 or something else - ?

if it is/was a 4.2 - why don't they fail with enuf regularity to be a frequent topic on this Board?

do the current replacement oem sensors for the '84-'89 911 now have 4.9's ?

- if so, seems that a new controller would be needed to use them, which is never mentioned (i'm guessing the controller circuit is inside the DME since there is not an obvious one attached to the harness as we find with the AEM gauges)

Tippy,

I think you are going to be significantly lower than 14.2 with the turbo you are running. I am trying to recall, but I think my 930 cis car runs well in the 11.2-13.5 range depending on load. It changed quite a bit when I changed cams.

The OEM sensor (original 1980s and current replacement type) for the Motronic are narrowband. 4.2 and 4.9 are wideband sensors

AEM X Series Gauge (30-0312) mounted in custom gauge plate
attached to top of steering console. Has advantage of
easy view, little eye wander from the road, and you can still
read full tach range.

This gauge is providing data from the AEM Can Bus for
several AEM devices in the engine bay: Infinity ECU, 6 wide band
02 sensors, Boost, FP, Fuel alcohol content and more.

After using a half dozen other gauges and wide band systems I'd say
this particular gauge had the least amount issues regarding wash out
from the sun. and its auto brightness is perfect in the day as well as
when night driving. For my application and eyes, its does quite well.

AEM's tech support, compared to others, is very good too.

http://forums.pelicanparts.com/uploa...1510424605.jpg

I have the AEM wideband failsafe gauge setup to log AFR, RPM, and manifold pressure (vacuum). When I download the log file I can see the manifold pressure readings in the gauge setup screen but when I open the data file in AEM data the manifold pressure reading just reads zero. Does anyone have any idea how to solve this?

harvardma,

i'll send you a PM with my email and try to assist you with the data issue on the AEM

my new AEM 30-4110 died after 4 hours. On their webpage there is a forum and a surprising number of posts of short lived sensors. My previous LC-1with 4.2 sensor worked well enough for 10 years but my new 4.9 sensor not so much. AEM user support says it could be thermal shock. The sensor heats up quick and is maybe fully hot as the engine starts. Any liquid droplets that hit the hot sensor will shorten the lifetime or kill it. I did not have any issues with innovate and 4.2 sensor but I am replacing the suspect sensor and I will wire it up to switch on with a time delay. I think I can use one of the MS2 programmable outputs and a relay for this. Or even a dumb switch

I wonder if there is a 4.9 sensor "equivalent" you can use that will work with the AEM?

From: Pyng Thai <pthai@aempower.com>
Date: Thu, Mar 7, 2019 at 6:07 PM
Subject: RE: AEM 30-4110 AFR gauge problem
To: Trond Reinertsen <trondreinertsen@gmail.com>


If you would like to try a replacement sensor, it would have to be either an AEM sensor part #30-2004 or a Bosch sensor part #17025.



Pyng Thai

Technical Support

AEM Performance Electronics

(310) 484-2322 Ext. 252

www.AEMElectronics.com

Just a heads up...

I have done some digging based upon some negative experiences I have had with oxygen sensors for AEM AFR devices.

It appears that there are a lot of counterfeit sensors out there. So I recommend getting replacement sensors directly from the AFR manufacturers or their authorized dealers.

I have used Innovate and AEM AFR devices in the past. The former did not work at all in my application. The latter worked for years. I have moved on to the excellent Ballenger Mortorsports AFR 500. So far it has been excellent as has been their support.

I am using an NTK sensor-- their box supports a variety of sensors.

I bought a spare NTK sensor last year from Amazon.com. Same NTK part number as what Ballenger sells as "calibration grade." But about $50 less expensive.

It now appears that that Amazon-sourced sensor may be counterfeit.

Ballenger go to great lengths to ensure that there supply chain is clean. I imagine companies like AEM and AIM do too.

I would stay far away from Amazon and Ebay for replacement sensors.

Pyng,

Thanks for chiming in; always great to have AEM support.

The AEM 30-2004 is on Amazon for $89.95 including shipping, and the Bosch for $63.49 with shipping. Not too bad.

Griff

Ok..sorry in advance for dumb question...can this be mounted in the engine bay instead?

02 sensors get mounted in the headers, after the collector (I do have a set of SSI's with a sensor in each cylinder pipe), at a straight upward (wires up, sensor downward) to 45 deg angle. Sensor electronics interface, for aftermarket, can go in the engine bay, away from heat and water, sensor gauge you mount on the steering console so it's in your face (ya don't want to be looking down at center console when your foot is on the gas).

I have been running a 4100 for years in my turbo car, bought a 4110 for my Carrera. The first one according to aem the gauge itself went bad even though the car was only driven a few times they said it was not under warranty. So I bought another whole unit since the car was already wired for the 4110. This unit is brand new and gauge appears to read correctly with sensor unplugged, by when plugged in, will never read full lean. I have over $300 in new units and neither one work correctly and can not get a response from aem.

Again, my application is racing.

I had good experiences with the AEM units I have used. Many of my racing friends have as well. And my engine builder/friend felt pretty confident with the AEM products for years.

For a number of reasons, our "herd" has moved on the the excellent Ballenger AFR 500. Most of us use the analogue output to connect with data systems that log values when we drive/race on track. And we can superimpose the changing values on our AIM SmartyCams that do real-time video rendering.

So far we are confident with the AFR 500 units, and I am more than satisfied with the sales support I have received from Ballenger.

Subscribed. Thanks!