[camaro5]

Originally Posted by Mr. Wyndham

I don't have a good hypothesis for the headlights...but my guess is that the brakes are for a GMPP kit test, or a ZTK-style package for 2019. There's not nearly enough changed to warrant calling it a Z/28...product differentiation would be a big fail there.

All in my opinion, only...

All that said......look REAL close - it has the "Z/28" backing plate for the badge in the grill area........

Originally Posted by Bhobbs

Or maybe they are just using a Z1LE for a drive train mule and the Z/28 will have a completely different fascia.

Originally Posted by Mr. Wyndham

Maybe...I know they use mules to test different things...as in, not all of the components are necessary to test brakes, or lights, etc...but I'd like at least the proper front fascia would be necessary to evaluate thermal management.

Definitely all pure speculation - we love speculation!

I think all these scenarios are valid possibilities. imho

The headlights though, the headlights.



2019 Silverado just launched dynamic skip-fire in Detroit.

Will 2019 Camaros get Skip-Fire?


.

[Tenfive]

Originally Posted by Lukemo

Never been a fan of that Krull like, spinning blade look... Reminds me of a mid 90's Ford Probe

I remember those cars , reminded me of the Johnny cabs ( from the original total recall w Arnold ) lol

[Soleil]

Originally Posted by camaro5

Definitely all pure speculation - we love speculation!..2019 Silverado just launched dynamic skip-fire in Detroit.
Will 2019 Camaros get Skip-Fire? .

Sorry for my ignorance but what is “Skip-Fire”

[Soleil]

Ok, i found something.

https://youtu.be/YXkq6Fzuuas
tula

[Corbu]

Originally Posted by Soleil

Sorry for my ignorance but what is “Skip-Fire”

It means the V8 can technically be in V2 mode on the highway. I am not sure about 1 cylinder firing only though.

[Bobkd]

Hopefully it's a smoother transition, unlike the current v4-8. This will let it run anything from 1-7 cylinders.

[Mr. Wyndham]

Originally Posted by Bobkd

Hopefully it's a smoother transition, unlike the current v4-8. This will let it run anything from 1-7 cylinders.

It sounds like it works more like PTM in the sports cars...all-electronic...meaning there might not be any hydraulic parts to wait for. I'm hopeful, this could be a game-changer.

[Martinjlm]

Originally Posted by Mr. Wyndham

It sounds like it works more like PTM in the sports cars...all-electronic...meaning there might not be any hydraulic parts to wait for. I'm hopeful, this could be a game-changer.

Here's how it works.....

[ChevyRules]

Would this possibly solve the lifter issue that has been plaguing the 6.2 liter engines as it is a different way of deactivating the cylinder?

[travislambert]

Originally Posted by Martinjlm

Here's how it works.....

I'm skeptical. That system looks fragile...

I think I'd rather see electric solenoid operated valves than this. Hopefully my concerns are unfounded, and it'll all work great.

[Bobkd]

So all cylinders will have the ability to deactivate the valves not just four. Will it still be at the lifters or will it be at the rockers?

[Chutzpah]

Call me old school, or anything else for that matter. I’d rather my engine to simply be an 8 cylinder, no less. Get rid of the over complicated engine and torque converter programming, then charge a gas guzzler tax (at least make it an option?) Is that so much to ask? Or for that matter, maybe a cylinder deactivation system that can be shut off with a flip of a switch... wouldn’t that be a novel idea?

[Mr. Wyndham]

Originally Posted by Martinjlm

Here's how it works.....

I'm confused....mostly because that's the exact same concept as AFM, right now - except at the lifters. Because the engines are OHV/pushrod.

So does this mean the new engines will be DOHC? There's something not adding up.


EDIT: Found something here...sounds more like new software management, rather than hardware in the case of GM's V8s...http://www.motortrend.com/news/when-...chnologue/amp/

Current AFM-equipped V8s have just two choices...run on all 8 cylinders, or just 4...and the switchover can be jarring at times. GM's done a pretty good job of ironing out the transition, but it's still there. This new technology allows the same concept to be applied to all 8 cylinders, and manages each one individually depending on the torque demands during that single 90º rotation. The goal, is to allow the throttle to be most open with the fewest cylinders, resulting in dramatically reduced pumping losses.

Apparently, a prototype Yukon 5.3L ran the EPA city cycle on just 2.4 cylinders (average over time), and up to 4 (average) on the highway cycle. A steady cruise at 70 mph required as much as 7 cylinders.

What this tech does is maximize the flexibility of the traditional AFM system.

So my guess is, in a pushrod engine - they'll still use the hydraulic AFM lifters.

[Martinjlm]

Originally Posted by Mr. Wyndham

I'm confused....mostly because that's the exact same concept as AFM, right now - except at the lifters. Because the engines are OHV/pushrod.

So does this mean the new engines will be DOHC? There's something not adding up.


EDIT: Found something here...sounds more like new software management, rather than hardware in the case of GM's V8s...http://www.motortrend.com/news/when-...chnologue/amp/

Keep in mind that this animation is a "generic" representation of how it works, not specific to any particular engine. This is produced so that Tula / Delphi can demonstrate the technology to other automakers for consideration. Since most engines nowadays are DOHC, the animation model is a DOHC.

As for differences between AFM and DFM / DSF.... AFM shuts down the same 4 cylinders (two on each bank) whenever it engages. DFM can shut down any particular cylinder and any number of cylinders. There are also differences in the monitoring of the conditions that trigger shutting off fuel and air to a cylinder. This allows for it to spend more time with some number of cylinders shut down, ie more fuel savings.