C8 Enhanced Engine Technology?

[JB]

this is the 310 hp turbo four just releasing from gm for the silverado. The detailed video gives good insight in my opinion on what engine technology we will see on the corvette hot vee twin turbo coming on the z06 / grand sport c8..

if you get a chance watch this video..GM engineers thermal managment on this engine is imoressive as is the built up bottom end of this little workhorse ..

in many ways its build diesel tough even as a gas engine...

i believe the 600 and or 800 hp c8 engines will be built to similiar high standards for high performance use.

i wouldnt be surprised if the thermal management part of the video also trickled down into the lt1 derived powertrain for the standard c8.

thermal management is essential to emission reduction and power production..l

we ve all be wondering how the standard engine could go beyond its 460 hp its currently making...in the c7 without forced induction...or at least i have....watch8ng this video does give dcent insight even without the forced induction aspect of the 2.7 liter 310 hp ..engine.

hopefully that 520 6.2 liter lt1 derived motir isnt vaporware...

i really believe ~500 hp is important for the c8...for corvette faithful to leave their c5s, c6 s and c7 s...

gm forgets the standard c5 to c6 hp jump was 50 hp to the ls2 ..and as much as 86 hp to the ls3...

c6 ls3 436 ho to base lt1 at 455 hp was a slight disappointment to some. The excellent hp and torque curve matching the ls7 up to around 4500 rpms made for a fabulous performing base engine ...yet psychologically only getting 24 hp more in the 60 or 70 odd grand c7 say grand sport held a lot of guys back..

i do remember thinking the grand sport should have had 500 hp...

still the grand sport equalled the mclaren 570 lap ti e in that car and driver lightning lap so obviously the c7 lt1 engine was more than capable....

but from a marketing perspective which transcends logic and logical thought....(even in rational men)...hopefully the c8 standard v8 will succeed in breaking the 500 hp barrier...


getting back to the video...sorry for going off on various tangents...lol

watch this as it is an excellent preview of themral manage,ent and other details of GM s high tech powertrains coming...even the hot twin turbo for those stepping up

[fvs]

very interesting video. Thanks!

[John]

Outstanding C8 motor enhancement upgrades:

I missed reading this thread when it was first posted, and just got caught up. It shows the latest engine enhancements that GM has incorporated and learned. To summarize them, for chances are that we will see some of them in the C8’s LT2 (?) motor...

But first, one thing we have learned about the 2020 ME’s motor is that it will be an enhanced version of the LT1, reflecting modifications and knowledge learned in engine design in the six years since the LT1 first debuted. Here then are some of those potential C8 motor enhancements:

1) Electric water pump, with varying amounts of flow based on need, not related strictly to RPM;
2) Advance engine heat management — both for quicker, better fuel and emissions measures on start up, but also for long term motor longevity and power capabilities;
3) Sliding or “axial” camshaft, giving the best variability for both power and economy, not being, as most previous engines are a compromise camshaft needing to balance the two competing needs. Also near infinite adjustability of valve lift.
4) Transitoning from previous two stage/two step oil pumps to a continuously variable output one — for better engine efficiency.

[C8Driving]

Thank you JBsC6 for finding that excellent video. I can now easily see how the C8’s motor will be able to amp up the LT1’s power and capabilities.

[JB]

Thank you JBsC6 for finding that excellent video. I can not easily see how the C8’s motor will be able to amp up the LT1’s power and capabilities.

I agree finding an extra 40 to rumored 60 hp is going to be a challenge.

thermal management will be integral to fine tuning for more power. What was once considered tuning right to the edge of potiential engine destruction has now become a safe yet more powerful environment.

The electric water pump and continously variable oil pump create additional efficiencies.

The axial camshaft and near infinite availability of valve lift...all contribute to gaining that extra 40 to rumored 60 hp on the revised Lt1 engine.

We hope...considering the little turbofour in the cadillac xt4 produces i believe 238 hp and then the 2.7 liter with the updated technology being discussed produces 310 hp or an additional 30 percent......(both being turbos) hopefully the naturally aspirated 6.2 liter lt1 derived motor can move from 460 hp to around 500 hp.....(an extra 10 percent )

520 would be a nice number but that is a big jump...anything from 495 to 520 would satisfy many of us..

ten percent would be 46 hp so we are in the desired range ...(506)

[Meldoon]

Big horse power numbers are always impressive. But what’s more impressive is when a car maker can build a car that is faster and quicker with less horsepower. Perhaps the new Corvette will be faster and quicker with less horsepower than the older Corvette. Faster, quicker, better drivability. I don’t care what the horsepower number is.

[JB]

Big horse power numbers are always impressive. But what’s more impressive is when a car maker can build a car that is faster and quicker with less horsepower. Perhaps the new Corvette will be faster and quicker with less horsepower than the older Corvette. Faster, quicker, better drivability. I don’t care what the horsepower number is.

The mid rear engine weight bias and the dct make your desire quite literally a good possibility...

the hp number. Is for sales figures...

the lt1 at 6.2 liters matches the previous gen hp and tq numbers to about 4500 rpms where most street driving is done...

im just suggesting the efficiencies of the new lt1 derived motor should could be expanded upon with technology derived from the new 2.7 turbo four gm masterfully created for its huge pickup trucks...

transfer that technology to the lt1 and we should be able to garner a ten percent increase in power on the naturally aspirated 6.2 liter v8.

considering gm got a 30 percent increase on the little turbo four from cadillac to put in its huge puckup trucks...

its seems possible such new tech made its way to the c8 base motor if we are lucky...

485 to 520 hp in the standard c8 would sound just about right...

no matter what gm does..im pretty confident...3.3 to sixty over and over again with the dct will be easy for the magazines and the public to recreate and fawn over..

braking should be impressive as should handling...

i fully expect the standard c8 to match the c7 grand sport on a road course like VIR...

the grand sport was clearly a giant killer on the track...

based off corvettes past history....the standard should place on the track between the c7 grand sport and the z06..

just a guess on my part

we are all just shooting the breeze till this new beauty is officially released sometime in the near future.

[Shadow]

This is a very good thread. I think we’ll see some of these engine enhancements on the mid engine’s entry motor.

We want 500 HP.

[JB]

Since gm can boost its little turbo four from 238 hp to 310 hp ...which is around a 30 percent increase...(although with a .3 increase in displacement...from 2.4 liters to 2.7 liters)

gm shoukd be able to hopefully get a ten percent increase in its naturally aspirated lt1 derived motor to bring us to a little over or around 500 hp that we as enthusiasts are looking for.

There is precent of a 50 hp increase from ls1 in the c5 to either 400 in the ls2 or 436 in the ls3 ( an 86 hp increase from ls1 to ls3)

another interesting possible outcome of course could be the doubling of the 2.7 liter for the high hp twin turbo corvette motor to come in a year or two after the initial release as rumored...

could the 2.7 be literally half the upcoming twin turbo corvette motor and come in at 5.4 liters? And 620 hp....

just fun speculation of course...although i do think the price will not be as framatic an increase if the so called gaprand sport had two halfs of the 2.7 turbo four as its engine... after all i would imagine that 2.7 liter turbo four making 310 hp is the lowest price engine in the truck lineup...(i have not checked pricing onthe various silverado models though so take myprice estimation as pure guesswork)

[WWR]

This is a very good thread. I think we’ll see some of these engine enhancements on the mid engine’s entry motor.

We want 500 HP.

If a MUSTANG has 480 now and the GT350 has 520 something the ME has got to have more just for BRAGGING RIGHTS (I still have those "teen" urges when it comes to HP)

[JB]

500 is a must have...maybe 496 ...hehe hhee..

a ten percent increase should be doable. ~510hp

520hp would be a deal closer ..

more than 520 would be off the charts for the standard c8...

im all for off the charts crazy!

[C7GSracer]

I doubt, though, that the GM turbo-4 has much left in the way of more power, that engine is pretty well maxed IMO.

[JB]

I doubt, though, that the GM turbo-4 has much keft in the way if more power, that engine is oretty well maxed IMO.

I could be totally wrong but an identical bore and stroke in a v8 as well as identical technology could give us in a 5.4 or 5.5 liter twin tirbo v8 620 hp...

if the grand sport offered 620 hp id be pretty impressed....


then The upmarket version could be a full boat 3.9liter version of the blackwing with a flat plane crank and 800 hp..

of course we are all just guessing.....

but its christmas so whats wrong with living a little dream on christmas?

[Mobius]

I expect that GM will replace the AFM (Active Fuel Management) system on the LT1/LT4 with the new DFM (Dynamic Fuel Management) system.

Instead of running in either 8 or 4 cylinders (with AFM), the engine can run in 17 different cylinder firing configurations with DFM. Apparently, the engine's computer does the math 80 times each second to determine the optimal set of cylinders to use (all the way down to just two cylinders if power demand is low), and immediately switches back to V8 as the driver's throttle commands are sensed.

I expect the driver will be able to bypass DFM through driving mode selection...

So, in addition to having 500+HP, the new LT1+ may be able to get fuel economy comparable to the current LT1*.

https://media.chevrolet.com/media/us...erado-dfm.html

*But not the way I drive...

[John]

Thanks Mobius for that detailed information.