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

[RooTBeeRthe1st]

DOD disable is easy. Find someone local with HPtuners and pay for the ecm credit and disable it. 50 bucks. He can also add your vin to vats with it.

I still want to figure out where and how to put an actual ethanol sensor on my fuel system instead of this imaginary virtual content reader.

 

[08z71bgm]

I still want to figure out where and how to put an actual ethanol sensor on my fuel system instead of this imaginary virtual content reader.

E38 ecm uses I think connector 1 (top) pin 40 for the sensor signal wire. I’ll confirm it tomorrow. I want to figure out what pin is used for IAT2

Google gm vats hptuners and you’ll figure it out.

EDIT: confirmed J1 pin 40 is signal wire

 

[kbuskill]

E38 ecm uses I think connector 1 (top) pin 40 for the sensor signal wire. I’ll confirm it tomorrow. I want to figure out what pin is used for IAT2

Google gm vats hptuners and you’ll figure it out.

EDIT: confirmed J1 pin 40 is signal wire

Ok, I'll bite... why do you want to figure out IAT2???

 

[08z71bgm]

Ok, I'll bite... why do you want to figure out IAT2???

So I can actually use IAT as it was designed to in addition to IAT2. IAT is in the MAF sensor. IAT2 is in the manifold. I have an LSA swap and IAT gets broken out from the MAF and used in the LSA lid temp sensor(IAT2) so IAT actually reads inside the supercharger lid(as long as you use the correct calibration during tuning) and not the intake tube.

 

[RooTBeeRthe1st]

E38 ecm uses I think connector 1 (top) pin 40 for the sensor signal wire. I’ll confirm it tomorrow. I want to figure out what pin is used for IAT2

Google gm vats hptuners and you’ll figure it out.

EDIT: confirmed J1 pin 40 is signal wire

Appreciate it!
When I put the blower on, iat2 would be nice to have also.

 

[RooTBeeRthe1st]

Finally did a canyon run again. Even being slightly lifted, this damn thing goes through the corners pretty easily.
*Pic dump

 

[George B]

Ready for a car show visit. This Mist N Shine is the best!

 

[Just Fishing]

Got the engine fully bolted in.
Lower harness mostly routed, still some areas i don't like much but i'm getting it close.
Converter is torqued down, I might have used a little too much 243 Loctite... oozing out slightly.

Pretty hard to get a torque wrench in there, so i gave it some good turns with out + swivel.


i'm digging the silver very much in the engine bay.

I sorta wanted to clean up the timing cover, but decided to save time + you can't really see it when the water pump and crap is installed.

About to install the starter, after i check some part numbers for a new transmission cooler to transmission case seal....

 

[Sparksalot]

Coming along nicely!

 

[CaptainAmerica1]

No

Got the engine fully bolted in.
Lower harness mostly routed, still some areas i don't like much but i'm getting it close.
Converter is torqued down, I might have used a little too much 243 Loctite... oozing out slightly.

Pretty hard to get a torque wrench in there, so i gave it some good turns with out + swivel.


i'm digging the silver very much in the engine bay.
View attachment 304960

I sorta wanted to clean up the timing cover, but decided to save time + you can't really see it when the water pump and crap is installed.

About to install the starter, after i check some part numbers for a new transmission cooler to transmission case seal....

cmon man all that trouble and no long tube headers?!

 

[RooTBeeRthe1st]

No

cmon man all that trouble and no long tube headers?!

That's gonna be me too. :'(
Stupid smog people with their BS rules

 

[Just Fishing]

No

cmon man all that trouble and no long tube headers?!

I already got my long tube header bug itched with the vette.

Man that's an old picture, those plug boots melted real fast!

It Was so shiny back then.


I can get away with headers, but man they are a serious pita...
Also the vette is exempt from silly rules due to the age.

 

[Just Fishing]

I also started work on the heads again.
I'm up to a solid 71cc's per chamber on one head.
trying to get motivated to start the second head...

Using the chamber design on the AFR heads that i'm looking at as a basis for what could be.
I'll get some pictures once it's all pretty.

I used water wetter + distilled water to cc this time
Less bubbles, seems more consistent.
It also knocked off 1cc from my prior numbers.

also doing it in the garage with the AC on, much nicer that way.
But i'm making a mess in my work space next to the hoe.

 

[gooffeyguy]

I already got my long tube header bug itched with the vette.

View attachment 305013

Man that's an old picture, those plug boots melted real fast!

View attachment 305014

It Was so shiny back then.


I can get away with headers, but man they are a serious pita...
Also the vette is exempt from silly rules due to the age.

I have ceramic coated longtubes on my mustang and have no cats either. It's a 95 and is exempt from emissions. Around here emissions is only needed on 96+ vehicles

 

[Rocket Man]

I have ceramic coated longtubes on my mustang and have no cats either. It's a 95 and is exempt from emissions. Around here emissions is only needed on 96+ vehicles

Just because you have longtubes it doesn’t mean you can’t pass emissions. Mine passes fine.

 

[gooffeyguy]

Just because you have longtubes it doesn’t mean you can’t pass emissions. Mine passes fine.

I didn't say you couldn't.

I used to have to pass emissions with it and had a small mid-pipe with cats that I would swap out instead of the non-catted X-pipe that's normally on it.

That was back when they would stick a sniffer up the tailpipe for the test. With it being before OBD2 it only has the 2 upstream O2 sensors.

Our 02 mustang runs a catless x-pipe also, but no longtubes, only shorty headers. I run MIL eliminators plugged into the harness at the downstream O2s. I uses to just have them turned off in the tune, but when the emissions test was done it was able to tell that they were disabled, or got no readings/communication with them.

It's been like that for years and I'm sure with the technology updates of today that tuners can probably get them configured to pass the tests, but this works and I'm not worried about changing it.

 

[Just Fishing]

Another long day.
Got the second set nearly done.
Once completed I'll drop them off at a machine shop to plane and hopefully verify i didn't fk them up.

And I'm picking aluminum slivers out of my hands, arms, and found two in my leg.

 

[Rocket Man]

I didn't say you couldn't.

I used to have to pass emissions with it and had a small mid-pipe with cats that I would swap out instead of the non-catted X-pipe that's normally on it.

That was back when they would stick a sniffer up the tailpipe for the test. With it being before OBD2 it only has the 2 upstream O2 sensors.

Our 02 mustang runs a catless x-pipe also, but no longtubes, only shorty headers. I run MIL eliminators plugged into the harness at the downstream O2s. I uses to just have them turned off in the tune, but when the emissions test was done it was able to tell that they were disabled, or got no readings/communication with them.

It's been like that for years and I'm sure with the technology updates of today that tuners can probably get them configured to pass the tests, but this works and I'm not worried about changing it.

Yes, I have the downstream sensors tuned out and they’re none the wiser at the testing station. They can’t tell.

 

[Rocket Man]

I already got my long tube header bug itched with the vette.

View attachment 305013

Man that's an old picture, those plug boots melted real fast!

View attachment 305014

It Was so shiny back then.


I can get away with headers, but man they are a serious pita...
Also the vette is exempt from silly rules due to the age.

Why are they a PIA? You can get longtubes with cats if you don’t want to deal with tuning the downstream O2 sensors out. ARH or Kooks make nice ones with bullet cats.

 

[wsteele]

Yes, I have the downstream sensors tuned out and they’re none the wiser at the testing station. They can’t tell.

I am shocked Oregon doesn't check for their presence with the mirror on the stick thingie.