What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Tonyrodz]

Two options. Both from Autometer.

View attachment 345506View attachment 345507

Found it--

 

[Sparksalot]

Found it--View attachment 345509

Nice!

 

[gooffeyguy]

Two options. Both from Autometer.

View attachment 345507

I have one like this in my mustang that houses my wideband O2 gauge.

 

[pwtr02ss]

I got four new ACDelco O2 sensors from RA a while back. They came in Delco packaging but no extra padding inside. The sensor ends all had anti seize, all four rattled around big time inside their box. Two were Hencho en Mexico, two unmarked to their origin.

Mine were the same way. Marked "denso". I ordered from RA as "GM Original Equipment". I was surprised when they came as repackaged Denso

 

[FrankU]

I think the timing is adjusted to give it more top end, but that's just a guess, since I installed the tune on both the silverado and the yukon I sometimes get a little ping out the gate depends on how long it has sat idling or not, I need to send a file back for both trucks. both have a sport tune.

Most likely they have the knock sensor riding the spark advance tables. That means the spark will advance till the knock sensor senses knock then it will back off the advance a hair till no knock is detected.

Hope that makes sense. I do have a problem with my writing skills.

 

[Sparksalot]

I have one like this in my mustang that houses my wideband O2 gauge.

What is this wideband gizmo that several of y’all are talking about?

 

[wsteele]

Mine were the same way. Marked "denso". I ordered from RA as "GM Original Equipment". I was surprised when they came as repackaged Denso

I had read somewhere that Denso supplied GM with O2 sensors, among other electronics. I suspect GM sources their O2 sensors from a number different vendors. I know the four sensors I got came from two different places of origin.

I would bet all the money in my pocket that the quality of the two ("ACDelco" and "Denso") are identical.

 

[Bill 1960]

What is this wideband gizmo that several of y’all are talking about?

It has a wider response range than the factory oxygen sensors and tuners use it to measure and correct the air-fuel ratio when they’ve made modifications to increase one or the other.

Be careful because if you speak it’s name you have to buy one.

 

[pwtr02ss]

I had read somewhere that Denso supplied GM with O2 sensors, among other electronics. I suspect GM sources their O2 sensors from a number different vendors. I know the four sensors I got came from two different places of origin.

I would bet all the money in my pocket that the quality of the two ("ACDelco" and "Denso") are identical.

For sure. I was like "Damn, I could've saved myself the $2 and just got the Denso"..lol

 

[Sparksalot]

It has a wider response range than the factory oxygen sensors and tuners use it to measure and correct the air-fuel ratio when they’ve made modifications to increase one or the other.

Be careful because if you speak it’s name you have to buy one.

I’m still debating a CAI tube to get rid of the intake resonance chambers. I’m not sold.

 

[Rocket Man]

What is this wideband gizmo that several of y’all are talking about?

It has a wider response range than the factory oxygen sensors and tuners use it to measure and correct the air-fuel ratio when they’ve made modifications to increase one or the other.

Be careful because if you speak it’s name you have to buy one.

Also of note is they’re generally used by those of us with a blower or turbo in order to monitor things like AFR more closely so we don’t melt a piston. So the wideband itself isn’t so expensive but the hardware that made it necessary usually is.

 

[Tonyrodz]

For sure. I was like "Damn, I could've saved myself the $2 and just got the Denso"..lol

I replaced the upstream O2s with Denso. No problems.

 

[gooffeyguy]

I’m still debating a CAI tube to get rid of the intake resonance chambers. I’m not sold.

Most O2 sensors are narrow band, they just basically tell the ecu if you're rich or lean (under or over 14.7).

A wideband O2 is more accurate and will tell you exactly what the air/fuel ratio is. When a car or engine is on a dyno they use one, and it allows the tuner to adjust the fuel and spark for best performance.

My mustang is supercharged and has a digital gauge on the steering column that uses a wideband O2 mounted in the exhaust system and tells me exactly what my a/F ratio is all the time. So when I'm at full throttle I can visually see if it's going lean and get out of it before anything bad happens. I like it around 12.1 to 12.3 and a wideband will be able that accurate. Sometimes it will be 11.8 or 11.9

An engine makes best power between 10.5 and 13 depending on the engine setup and whether it is naturally aspirated or boosted.

 

[Tonyrodz]

Nice!

I'd much rather have this one. Less intrusive and stealthy.

 

[gooffeyguy]

I'd much rather have this one. Less intrusive and stealthy.

Yeah but then you gotta run wires into the door then up to that area. Not too difficult, but more work than an A-pillar pod or column pod

 

[Tonyrodz]

Yeah but then you gotta run wires into the door then up to that area. Not too difficult, but more work than an A-pillar pod or column pod

True, but not a terrible job.

 

[alpha_omega]

Negative. I plan to swap in a different engine/transmission combo when these die so I didn’t invest in a B&M at this time.

What combo are you planning to run next?
I hear the old 4.3l gets pretty good gas mileage, but sure can’t beat out the 2.8 that the early GM’s had. Haha! Come to think about it the 4.3l (LB4) was the engine my Typhoon had in it, but that wasn’t quite your average 4.3. I wonder if that would be comparable to putting a whip in 6.2? Wait, no…the LB4 was a turbo and the whipple is a supercharger, so that’s like comparing apples to bananas.

 

[Tonyrodz]

What combo are you planning to run next?
I hear the old 4.3l gets pretty good gas mileage, but sure can’t beat out the 2.8 that the early GM’s had. Haha! Come to think about it the 4.3l (LB4) was the engine my Typhoon had in it, but that wasn’t quite your average 4.3. I wonder if that would be comparable to putting a whip in 6.2? Wait, no…the LB4 was a turbo and the whipple is a supercharger, so that’s like comparing apples to bananas.

I had a 92 teal Ty. Badass truck!

 

[alpha_omega]

I did the one in my Silverado so I could put a sub box in there. Priorities.

There has to be a way that Rocket could easily fabricate some storage space within his sub box. I remember doing something similar many moons ago back when I was much younger - except it wasn’t for storing my .45

 

[alpha_omega]

I had a 92 teal Ty. Badass truck!

Mine was black. I wanted to buy a Cyclone back then but opted for an 87’ Grand National Twin Turbo instead. Much better investment…