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

[wendal]

A higher stall torque converter will “grab” at a higher rpm to get the engine more in the power band. If you brake torque your Tahoe (foot on the brake and the throttle) that point in which you feel it want to lurch forward is the stall speed where it’s locking up to move the vehicle forward. With a large cam it’s going to want to do that much sooner so a higher stall will fix that. Large cam with a stock converter will be incredibly hard to stop, keep stopped and keep running at idle.

Vvt is variable valve timing. It can adjust the timing on the fly so it can add timing at low rpm to make more power and retard timing at high rpm to make more hp. Basically best of both worlds of a high hp cam and low end torque cam. Your 07 does not have it though (at least I don’t think the Tahoe got it)

Thanks guys. This is why I love this forum. There has not been a question about my truck that I could not get the correct answer here. You guys are GREAT!

Sent from my GM1917 using Tapatalk

 

[MajorJakkov]

anyone interested buying my VLEDS micro LED headlights? H11 bulb, 5000K temp, about a year old..new about $150

 

[iamdub]

As far as I’ve seen it’s just the resonator that’s a “restriction” in the stock catback.

I don't see how. It's at the very end of the line and it's a straight-through design. It's practically a fancy exhaust tip. It's there for sound wave manipulation and has almost totally zero effect on air flow.

 

[kbuskill]

Not so sure about that. Factory mufflers are there to make things quiet and they don’t care if it requires sacrificing power or torque. It’s usually a choke point. I would have liked to see just the headers swapped out so the results could be completely due to them and not other things like a cat back because any company that sells catbacks also claim hp and torque increases over the factory setup. As Blowmaster states: “Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. “ Throttle response being torque I assume.

I agree... It would have been better to see a dyno run of just the headers on the stock exhaust to get a more accurate idea of what part gives you more benefit.

In my case, I didn't really care what they did separately as I was planning on redoing the whole exhaust anyway so I just wanted to see the overall gains.

 

[07Burb]

I don't see how. It's at the very end of the line and it's a straight-through design. It's practically a fancy exhaust tip. It's there for sound wave manipulation and has almost totally zero effect on air flow.

i doubt it has a performance impact but the stock resonator at the end looks horrible so that's why I chopped mine off LOL

 

[iamdub]

i doubt it has a performance impact but the stock resonator at the end looks horrible so that's why I chopped mine off LOL

Agreed. Someone could polish their's so it'd look like a fart cannon from a Civic.

 

[kbuskill]

Agreed. Someone could polish thier's so it'd look like a fart cannon from a Civic.

Unfortunately, I had to put mine back on... there really wasn't enough room anywhere else to put it after adding a 3 foot muffler underneath so I had them run it straight out the back and I tried to camouflage it by painting it flat black and putting a 4" stainless tip behind it.

My truck is low enough that you don't really notice it anyway... lol

 

[Ilikemtb999]

I don't see how. It's at the very end of the line and it's a straight-through design. It's practically a fancy exhaust tip. It's there for sound wave manipulation and has almost totally zero effect on air flow.

There’s a giant muffler/res right in the middle. Not the very end bit.

 

[gooffeyguy]

Mine's not lowered and I don't notice the resonator unless I'm laying looking under the vehicle [emoji848]

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Ilikemtb999]

I feel like it sticks out like a sore thumb but don’t need the vehicle any louder.