Black Bear / 2011 Sierra 6.2 Dyno Results

[xertechx]

I just got back from taking my baseline dyno reading with Justin from Black Bear, what a nice guy. Anyway, We are doing a before and after with my truck since there isn’t much info on the 6.2. We did a baseline today to get stock HP, I will post the videos in a bit here. Tomorrow I get my intake and exhaust and then in 2 weeks we are going to do the tune with the dyno, then I will have results. I’m pretty excited to see what happens. I don’t have the results to post yet but I do know what they basically were.

 

325 hp

350 tq

This is on 89 octane, which he tells me is not what I should run. I will post the results when he emails them to me.

[Matt_]

Awesome. Ill be watching this closely. ... I'd like to get a BB tune someday.

[Badbird2000]

Susbscribing to this one.. will be interesting to see..

 

Also, would like to see the dyno graphs... peak hp and tq is nice, but usuable hp and tq is where its at.. how often do you drive your truck wide open?

[xertechx]

Susbscribing to this one.. will be interesting to see..

 

Also, would like to see the dyno graphs... peak hp and tq is nice, but usuable hp and tq is where its at.. how often do you drive your truck wide open?

 

 

The printer wasnt working so he will email me all of that at some point today I think. I am pretty heavy footed so quite often I guess.

[xertechx]

 

 

 

 

 

I didnt organize or go threw them, so there might be a dud or 2...

[Jennabear]

Thanks for the thread Erick, hope you had fun up at the dynos!

[ColoradoSkiCountry]

Man I love the sound of the 6.2!

[xertechx]

Man I love the sound of the 6.2!

 

 

The video does not do it justice, it was better than.... well nevermind.

[zacharywhitson]

Numbers look good for a stock truck. The dyno really gets your heart going dosen't it? The stock exhaust on these trucks is really good. Nice rumble and bark but ZERO hwy drone.

 

I'll be watching to see this. Thanks a lot for shareing. I too have a 6.2 and it's nice to see some real numbers. I don't have a dyno nearby so I'll just have to enjoy mine with the sotp gauge. ARH, blackbear, K&N, here I come!

[flyin6]

I'll be watching. Will be good to see post tune numbers

[xertechx]

Today I pick up my truck with a Magnaflow muffler, they said there is no need to replace the factory pipe. I also got intake but that won’t be put on until Justin is ready. Price for intake and muffler installed was about 515.00. Not bad considering I was going to spend 1k on Borla only to find out the stock setup is done very well. Justin also told me to run 91 octane, apparently GM retards the timing to get rid of engine knock to accept lower grade fuel, the result, loss of HP with lower octane.

[music]

Just to confirm, those are rear wheel numbers on 89 octane using a loaded dyno? Dang... Would be nice to do both the stock and tuned results on the same fuel. Otherwise, it's a guess as to how much difference each factors into the "after" results.

[flyin6]

Today I pick up my truck with a Magnaflow muffler, they said there is no need to replace the factory pipe. I also got intake but that won't be put on until Justin is ready. Price for intake and muffler installed was about 515.00. Not bad considering I was going to spend 1k on Borla only to find out the stock setup is done very well. Justin also told me to run 91 octane, apparently GM retards the timing to get rid of engine knock to accept lower grade fuel, the result, loss of HP with lower octane.

 

I am running my stock cat back with American Racing LT's and currently no cats in the H-pipe. I have both cats and W/O. The sound is amazing with the stock exhaust. Further, the factory is using a minimum of 3.25" to 3.5" pipe, whereas the aftermarket is using 3". I listened to their argument in one case about the 3" pipe making more torque, but it's a bunch of bull. From my experience, the factory pipe makes more power, AND sounds better. Further the factory pipe has no drone like most all of the aftermarket pipes.

I added a cold air intake and a tune to my 6.2 also.

The headers and tune made the biggest difference, my truck feels like a hot rod!

[xertechx]

Just to confirm, those are rear wheel numbers on 89 octane using a loaded dyno? Dang... Would be nice to do both the stock and tuned results on the same fuel. Otherwise, it's a guess as to how much difference each factors into the "after" results.

 

 

You are correct, I wouldnt mind running the 89 again but that is up to Justin and I think his tunes are made for 91. At the exhaust shop the guy showed me a dyno from an 09 silvy with the 6.2 (I thought only VMax was avalible in 09)and it only was around 295. I don’t know if the tranny, it being an 2011 made it better or even the octane being 87 in the silvy(speculation). I’m no dyno expert so I am guessing. I do know that upping the octane does not have any effect if your vehicle is rated at 87 unless you have decent mods, but it is not the same with this truck I guess due to timing retardation(?).

I will post exhasut vids after I get it today.

[Seelow]

Keeping an eye on this thread. I just sent my scan file to Justin for the preliminary tuning on my 6.2. Can't wait to get it done.