2008 Yukon Denali Go Faster Mods...
 

Hi Guys,

Just thought I would share my performance upgrades in this thread.

I'll start off with a few pictures of the parts going on there...
All parts received, some parts are already on and the balance of the install is scheduled for Monday.

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Any details about the cam? Did you get a stall converter too? I'm curious what kind of gains you'll see.

Did you get any baseline 1/4 mile times?

On the cam issue:
Cam is Mast Motorsports HO VVT cam for L92/L99 engines.
224/238 - .578/.593 - 115
Here's the link:
Mast Motorsports High Performance Powertrain Solutions
I contacted Mast and they highly recommended that I do not delete VVT.
They said that VVT enables them to get higher results from a milder cam.

Stall converter:
I am working with Justin at Black Bear on this. I asked him about doing a stall and he said that with the current mods, no need to do a stall as the 6L80 is fine without one, even with a cam.

Unfortunately, I did not dyno the truck stock.
I did dyno the truck after installing the CAI, headers and local tune. It was running quite rich at the time though, and it was not tuned for the headers/y-pipe, so the tune was less than ideal. It dyno-ed T 312 AWHP AND 356 AWTQ I believe.

I am going for the install of the rest of the kit today and will start the tuning process with Justin tomorrow. As soon as I am done with the tuning with Justin, I will dyno again and post both dyno sheets here.

The gains would then be attributable to the cam and Justin's magic work.

As far as baseline 1/4 mile, I do not have access to a track locally.

I do have a Performance Box and I will post PBox run results after the job is complete, but I did not do any PBox runs to baseline.

I will post more details as I get 'em.

sweet glad to see more cammed VVT guys

Awesome. I bet it'll catch some people off guard.

Thanks guys! :cheers:

The Denali is now cammed! :burnout:

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I will get the data logging done today to send to Justin@BBP.
Hopefully shouldn't be too long before I have a solid tune.

Al parts are on the truck.
BBP initial tune received and installed.

Here's a quick vid of cold start (iPhone so not the best).

2008 GMC Yukon Denali Cold Start - YouTube

Is that with ARH headers running through factory exhaust?

Sounds good :cheers:

Thanks. :cheers:

I really wanted to try to keep noise levels under control.
I was told that the stock muffler on these trucks flows pretty well so that's what I did.
ARH 1 7/8 headers, ORY, stock muffler and resonator.
I am looking at maybe upgrading the resonator to something a bit quieter though.

Dyno run video
 

Here's a video of the dyno run.
This is with BBP initial tune. Final tune is pending.

'Nali Dyno Run.m4v - YouTube