2004 6.0 NV4500 Tahoe

[pwtr02ss]

How exactly do you use narrow bands? I've always read that narrow band tuning is trash and for people who can't afford a wideband lol.

Now you're asking the real questions that I've been wanting to know!

 

[randeez]

If you're only using your wideband then you shouldn't be looking at the stft and ltft error % cause that's not even what your targeting lol
Set up the same graph but replace the narrow band with the wide band input.
But if the narrow bands are off 25% you're either in PE mode the whole time driving or not targeting stoich, That's all the narrowbands care about. So you when tuning them you need to focus on steady fueling, no start and stops, no hard acceleration, no decel fuel cut.

 

[Dantheman1540]

If you're only using your wideband then you shouldn't be looking at the stft and ltft error % cause that's not even what your targeting lol
Set up the same graph but replace the narrow band with the wide band input.
But if the narrow bands are off 25% you're either in PE mode the whole time driving or not targeting stoich, That's all the narrowbands care about. So you when tuning them you need to focus on steady fueling, no start and stops, no hard acceleration, no decel fuel cut.

Trying to follow along here, I don't have a graph with any narrowband input, I have one with wideband data tho. I should replace the wideband with the "Short Term Fuel Trim Bank 1 or 2" and use it exactly as I would the wideband info by cross referencing the data with the VE table and making adjustments but only in the idle/part throttle cruise areas.

Here's how I set up the graphs. Can't go test because the truck has no exhaust right now.

 

[Dantheman1540]

Since I need to weld that bung in the header to get more accurate readings I might as well pull the entire exhaust off and redo stuff, you know since I'm already there........

So the plan is to ditch the over axle pipe and the two resonator tubes. I have a 3" cutout laying around so I will attempt to cut and weld that into an H-pipe directly before the massive dynapro dual3"/single 4" muffler. I will take the dynapro and attempt to make it quiet by adding silencers to the inlet and outlet port essentially necking them down to dual 2" inlet and single 2.5" outlet. If that doesn't work I will try to fit the old factory replacement FloPro that was super quiet in place of the dynapro but if I can make the dynapro work that would be best since the dynapro inlet is a offset different pattern than the flopro.

 

[pwtr02ss]

Love the 3d auto cad layout

 

[Dantheman1540]

Love the 3d auto cad layout

I'm a professional 8=========D~~~~~~~ o

 

[Fless]

Was gonna say I don't see your usual "pointer" in either of those.

 

[iamdub]

You gave the LOL meme a wicked hairdo, dancing body and an ankle bracelet.

 

[Dantheman1540]

Did a little touch up welding to my mid pipes. The mig welds were okay but looked ugly and were lumpy so I took my tig torch and burned it all smooth with a nice weave pattern. Also welded the new bung in and closed off the old one.

 

[Dantheman1540]

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You gave the LOL meme a wicked hairdo, dancing body and an ankle bracelet.




View attachment 368503

When I was sitting on the commode last night and saw this on my phone I didn't quite get it. Now that I see it on my laptop I realize its genius and exactly what I would expect from a man with an avatar like you have lol.