I was thinking about installing a AEM Wideband when I install my UTEC and have kinda a n00b question...

I have the Borla TD exhaust and I realize the a/f sensor has to be installed into the exhaust pipe. Does it matter which exhaust pipe I read the a/f from? Since I have the TD system, the exhaust runs from the cats to each individual pipe back the the muffler. Since the AEM only has one sensor whouldn't reading the a/f from one pipe only give you the a/f from 3 of the cylinders?

soory if this is a n00b question...

 

I have the Injen true dual and mine is installed in the driver's side piping. I think mine is installed post cat but isnt it supposed to be installed pre cat?

 

Typically you want to install it on the Test pipes, but it can be mounted pretty much anywhere with the reading being more accurate the closer you get to the exhaust manifold/headers.

 

I installed mine at the top of the cat.

 

But then wouldn't it just read half of the engine if it is only on one set of the pipes? 1-2-3 could be runnign lean where 4-5-6 could be rich?

Maybe running dual a/f's might be more accurate. I wish there was a way to tap in tothat info from the ECU. I think the Cipher does? or am I wrong.

 

I believe the cipher does do that. I run dual a/f

 

dayum..... you have 2 a/f meters?


How about a pic of your interior?

 

I will have some fresh pics for you tomorrow my friend.

 

I personally think your set-up is the best on this site...JWT twins...built motor...stereo system....you got all the goodies!!!

 

*** *** *** ***... I jinxed myself LOL... I went out for something to eat and now my Right side AEM wideband is readin 10.0 all the time, while the Left side is reading normal.... I think running all that leaded racing fuel has taken its toll since that was the first a/f gauge I installed. guess I need a new sensor.

Thanks for the compliments Netko350Z, I have worked really hard at getting this car together. I am going to be looking at a set of seats tomorrow that I may buy (not sure how red will go with my car though, maybe if I paint the Brembo's red it would look good). I am getting the Vertex sides and Nismo rears soon and will get everything painted to match. Need a carbon Fiber Hood and I will be all set.......almost LOL

 

if you only have 1 sensor, as most of us do, moniter the drivers side - the run traditionally a tad leaner than the passenger side, since the passenger side is the feed

 

I have mine mounted on the passenger side high flow cat just after the flange where the cat meets the manifold and before the catalyst. So you believe because the intake and throttle body are on the driver side that they should run leaner then the passenger side. I would like to see numbers to back that up. I remember the early discussions that the fronts run leaner than the backs hence the angled and non angled spacers.

 

^ I'm with you zach. I think mine was installed on the y-pipe, which is post cat. Everything I have been reading has said to install pre-cat. At least, I think that's the sensor on the y-pipe.

Does having the sensor installed lower than where it should be affect what the A/F is reading? Am I reading leaner than I really am?

 

it has nothing to do with where the intake and throttle body is - it has to do where route the fuel takes - the side where the feed line enters the car is the passenger side. Drivers side fuel rail is thus the farthest from the source and as such, runs the leanest (slightly, but its leaner)

yes if you are post cat you are monitering leaner than the car actually is - how much I have no idea

 

When I had my car dyno'd, the AEM gauge read 11.5 and the Uriba (spelling), read pretty consistently @12.4.
The AEM sensor is mounted on the PS pre-cat. The Uriba ran into the DS tail pipe on an Injen TD.
Dunno if that helped any...

 

Horiba.....excellent pieces. I still have the first one I got about 12 years ago - widebands were a small fortune then

the farther post head you go, the leaner your readings will be, just like you described. Assuming for a second both the Horiba sensor and the AEM you have are scaled similarly, you experienced nearly 1 point difference simple measuring at the tail pipe vs just behind the cat - that's a huge difference. Now granted, the two use different sensors, and who knows the condition of the Horiba (assuming your AEM is new and has never seen race gas) - but still, shows you that there is a difference in what info you'll get

 

Thanks for correcting my spelling...

 

lol

 

I don't see how which side gets fed first would make any difference in a returnless fuel system. Has anyone measured the fuel pressure with two gauges on each fuel rail at WOT?

 

whether it's returnless or not is not of much significance here - it is all about the order the injectors get the fuel and the volume they receive - the further away the injector is from the source. Granted, this is a V motor and not an inline, but the same principal applies. Pressure is not the significant factor here...volume is