how do you hook up a wideband on TDs?

OMGls1jz · 11-13-2008, 10:01 PM

hey guys i'm wondering how would you hook up a wideband with a single sensor on a TD setup? i've searched and nothing came up. would you have to have two separate widebands? or could you some how merge two sensors into one wideband? i'm asking because i have a friend that has hp tuners and is willing to do a street tune for me but i don't know if i need to put the wideband on just one side or both. LMK guys.

thanks, toua

**mark21742** · 11-14-2008, 04:13 AM

Originally Posted by OMGls1jz

hey guys i'm wondering how would you hook up a wideband with a single sensor on a TD setup? i've searched and nothing came up. would you have to have two separate widebands? or could you some how merge two sensors into one wideband? i'm asking because i have a friend that has hp tuners and is willing to do a street tune for me but i don't know if i need to put the wideband on just one side or both. LMK guys.

thanks, toua

I'd drill a hole in one side and weld in an o2 bung just behind your factory o2s. should beable to do a good tune with just one.

OMGls1jz · 11-14-2008, 07:06 AM

Originally Posted by mark21742

I'd drill a hole in one side and weld in an o2 bung just behind your factory o2s. should beable to do a good tune with just one.

which side should i put the bung on? driver or passanger side and how far down from the stock o2's should it be?

**Frost** · 11-14-2008, 07:28 AM

why can't your tuner just pop out a NB and put the car in OL? It has to be in OL anyway to tune it...

OMGls1jz · 11-14-2008, 07:42 AM

Originally Posted by Frost

why can't your tuner just pop out a NB and put the car in OL? It has to be in OL anyway to tune it...

what is NB and OL? sorry i'm a newbie and i tried searching those acronyms

**shady milkman** · 11-14-2008, 07:51 AM

Originally Posted by OMGls1jz

what is NB and OL? sorry i'm a newbie and i tried searching those acronyms

x2

**emoFTW** · 11-14-2008, 08:12 AM

NB i dont know, but OL is open loop i think.

**Dewman** · 11-14-2008, 08:27 AM

narrowband i think

**Frost** · 11-14-2008, 09:24 AM

that's right; narrow band and open loop

OMGls1jz · 11-14-2008, 09:51 AM

okay thanks

**mark21742** · 11-15-2008, 04:37 AM

Originally Posted by Frost

why can't your tuner just pop out a NB and put the car in OL? It has to be in OL anyway to tune it...

hey frost, i have an A/F gauge hookedup to the factory o2s and it sits there and constantly swings full lean, then full rich and back the whole time the car is running.....if i drilled and put a seperate bung and o2 in just for the gauge would it still swing like that, or would it give me more of an average?

**Frost** · 11-15-2008, 05:04 AM

that swing is normal closed loop operation. It's not a very useful gauge.

**GatorSS** · 11-16-2008, 02:02 AM

Remove one of the stock narrowband front O2 sensors and install the wideband in its place for tuning. Reverse when tuning is complete. If you plan on doing more mods, then get the LC-1 wideband and leave it in permanently, since it also has a NB output that you can plug into your stock PCM harness. That makes it easy to tune again after your next mod. (I'm sure there are some other WBs that have NB output, too.)

**Firebirdjones** · 11-16-2008, 05:04 PM

I welded an extra bung on mine,,,,I can force it into open loop in the tune if need be for part throttle tuning, but I primarily use the wideband for WOT tuning,,,which is open loop anyway.

OMGls1jz · 11-16-2008, 08:25 PM

okay, i ended up welding a bung on the driver side of my y-pipe and did a little tunning on my brother's z28 but my lc1 WB took a crap on me..... i haven't had much luck with these lc1's

**Firebirdjones** · 11-17-2008, 05:10 AM

Ouch, sorry to hear that. I haven't had any problems with my LC1 wideband. Still on the original sensor as well after several years. They don't like moisture at all. It's best to weld in the bung above the centerline of the exhaust pipe to avoid any moisture if possible. I also prefer to run the engine until warm, maybe even a spin around the block to make sure all moisture is out of the exhaust system before I screw in the sensor.

If it's a new sensor you need I believe there are places on the internet that sell them relatively cheap.

**Frost** · 11-17-2008, 06:16 AM

I have owned 3 LC1s that have died, and have had many many customers that run them also relate stories of their early demise.

All of mine will tell you that the sensor is bad (put in a new one, you get a day or two and it does it again) when it is perfectly fine.

OMGls1jz · 11-17-2008, 07:26 AM

i was told they were the best but i think they may not be the best no more. a guy i know has no problems with his and he's had his for like 2 years. i've barely had mine for a yr and i bought it brand new, this is the second time i've had problems with it. the first time i had to send it back to get fixed cuz something malfunctioned