Put it right next to the default location for the narrow band o2 sensor.

 

What you got for a fuel system?
Powerwise I don't know, Kinda don't work like that. But I say about 380rwhp and 400ftlb.
Put it as close to the stock sensor as you can.

 

What you got for a fuel system?
Powerwise I don't know, Kinda don't work like that. But I say about 380rwhp and 400ftlb.
Put it as close to the stock sensor as you can.

Walbro pump, Aeromotive FPR, -6 an stainless lines, 440 injectors. Turbo is identical to JBLMK3s. Hope to have at least 400 hp.

 

buy a cheap ~$25 universal O2 sensor for a NA supra. It will come with the flange, and a thread-on O2 sensor. Unthread that 1-wire universal sensor, and thread in your wideband. Bolt the flange down in the stock location

 

^^^ That is one awsome idea ^^^ Good advice!


Trey

 

I'd bet over 400, I'd run some good gas for safety, you dont wanna hurt that baby. Keep us posted

 

The bung for the wideband should be further down the exhaust stream. I do not believe that wideband sensors(some may be able to) can tolerate the high temperatures that a turbo can sometimes reach. I put mine right where the downpipe goes horizontal. You also want the sensor on the "top" of the exhaust pipe so that carbon, etc doesn't collect on the sensor. Wideband O2 sensors are sensative to pressure so if you put it close to the turbo you will need to account for that amount of error. Some wideband units DO account for pressure and other do not. I am not an expert on this by any means... I'm just spitting out what I learned when I was installing my TechEdge unit last year. HTH.

-Joe
87T

 

buy a cheap ~$25 universal O2 sensor for a NA supra. It will come with the flange, and a thread-on O2 sensor. Unthread that 1-wire universal sensor, and thread in your wideband. Bolt the flange down in the stock location

Well that won't work, you need the stock O2 sensor in place to run your car, unless I'm misinterpreting what you're trying to say here?

 

You misunderstand. He means that you buy the 1 wire O2 just for the flange. Weld the flange on the stock O2 housing and bolt the wideband into that flange.

 

He said "bolt the flange down in the stock location" not weld the flange in a different location.

The stock narrowband needs to be in place on a stock ECU of course. If you put the WB in the stock location where are you going to put the NB?!?!?
Maybe I'm confused... I don't know. I guess I just don't want the person looking for the correct answer to think that he can simply take away the NB, that's all.

-Joe

 

Well I think Jeff is talking for tuning. Since a wideband O2 sensor has a limited life, they are not really supposed to be in for daily use.

And on the dyno at WOT, the stock O2 sensor is being ignored anyway as the ECU is just running a learned value map(open loop)

 

Some of the old ones did die quickly I think, but many of today's vehicles use WB sensors and they have the normal 100K life expectancy. As long as you don't leave them installed and not "on"(heated) they should last you 100K. And with all of the time our cars spend on jackstands it would take many years to hit even 50K

Anyway, I am babbling on. I personally would installed the WB sensor in a separate location so as not to mess with the stock setup. Good luck with your dyno session!

-Joe

 

Just go the hardware store and buy a M18 x 1.5 nut, grind it round if you like and weld it on. I put mine next to the stocker on the turbine exit elbow and it works fine. This is the $2.50 solution.

 

The cheapy NA supra universal O2 sensor comes with the flange that you bolt on. The universal 1-wire sensor, will unthread from that flange though -- so you can thread in the wideband without any welding.

You can drive your car around without you O2 sensor plugged in. The car will stay in open loop, and under partial throttle conditions you will run rich. But under wide open throttle, the stock ECU does not even look at the o2 sensor readings -- so you do not need have the stock o2 installed when you dyno.

If you are looking to permanately mount a wideband a/f gauge, then I would probably weld a bung on, but if you are just using the wideband for occasional tuning, just unbolt the stock one, and bolt the wideband back in (using the flange from the cheap NA sensor)

 

Use the low volt output signal on the wideband to operate the stock computer (if your widband has one). The PLX unit has both a high and low volt outs to use with dataloggers, and also low volt O2 sensor applications (IE replace stock o2 signal and also the Air/fuel gauges such as Autometer)

 

the AEM Uego has this feature as well, but in it's case the voltage scale doesn't line up with a narrow-band's voltage output so the only thing it does is prevent a check engine light

 

You should mount the o2 sensor above 3 o'clock and 9 o'clock position on the exhaust pipe, otherwise condensation in the pipe will rust and destroy your sensor. You should locate the bung before the cat but keep it away from the turbulence after the turbo. I would say part way down the downpipe would be good.

You can buy a bung kit for $8.50 from www.innovate.com.

 

Just bought the PLX M-300 kit and a weld on stainless bung for it.
I was going to just put the bung near the stocker, but after reading about the LSU4 sensor, and that it DOES NOT WORK RIGHT AT TEMPS OVER 600c, I have decided to move the mounting location. Where however I don't know yet.
I'm thinking down in the space where the cat used to be, there should be enough room to get the sensor more vertical there to prevent condesation build up, and it should be cool enough by then in the gas flow so the sensor works fine.
Technically, the sensor could be placed near the exhaust tip and still get a accurate reading. (Heat is maintained by the control circut, not exhaust gas temps.)
I planned on replacing the stocker and using the 1v output to feed the TCCS, but don't have to run it that way. (I'd imagine the new sensor is more accurate than the old one I have, but the current one works fine for narrowband.)
Any thoughts on mounting the wideband say in the cat back? Or the end of the DP where it bolts up to the cat back? (I have no cats.)

 

Any thoughts on mounting the wideband say in the cat back? Or the end of the DP where it bolts up to the cat back? (I have no cats.)

I put mine on the horizontal part of the DP. That's a few feet from the turbo so it's away from high heat and pressure fluctuations for the most part.

-Joe

 

I am going to put mine in my test pipe.