Still Hanging On

[WWR]

Some folks still think that the car we are following is a CADILLAC and that one of the engines CADILLAC HAS IS THE 4.2 est with 550 HP. I remember the head of Cadillac saying the engine was to be a CADILLAC engine only. Hasn't the CADILLAC rumor been debunked that the car is a CHEVROLET and will have Chevrolet engines

[Frenzy36]

Or Maybe - Just Maybe - It's a Jaguar

[John]

There will be a 2020 mid engine Corvette. It will have a traditional Corvette OHV V8 motor.

There will not be a 2020 mid engine Cadillac.

[meyerweb]

If the car we saw driving around the 'ring is a Cadillac, GM has successfully executed the greatest misinformation campaign in automotive history!

[John]

That would have been gargantuan if — for the only 2020 mid engine sports car being revealed by GM is going to be a Corvette. Cadillac wishers, sorry but you are going to have to wait until probably 2022 or later, if ever.

[SheepDog]

There will be a 2020 mid engine Corvette. It will have a traditional Corvette OHV V8 motor.

Well that sounds right. Like it or prefer something other, notwithstanding.

But if it (C8) looks like the prototype (the one at the ring) and has the traditional pushrod engine, then where is the shock and awe. If that is it, then the reveal has already happened. Santa Clause came in September. Our toys are already old news. We can send Santa an updated wish list. Go back to bed and dream about a DOHC , TT, flatcrank ,C8 Z0RA Z06 for Xmas 2023. Just skip January 2019 in Detroit. That would explain an alleged shakeup of the reveal team. They already revealed theselves out of business.

If it is to be the the car that we have already seen powered by the engine that we already well know, then that will probably be a performance bargin. Will dance with Mclaren and kick butt. Old news! But wll it be a suprise? awsome? shocking? amasing? breath taking.

Will we be blown away by the quality and price combnation? Not immediately by the ultimate quality and performance
combination? Where will the "wonder" be?

Please GM, Reward those who waited, who wondered and wanted to be blown away.

[JB]

What about a turbocharged 3.9 liter flat plane crank version of the 4.2 liter cadillac motor since they are hand built in bowling green?

for some reason that would be a cooler motor than the exact cadillac 4.2 version..

5.5 liter is too large for a flat plane crank vibration issue.

[SheepDog]

[QUOTE=JBsC6;n16128]
What about a turbocharged 3.9 liter flat plane crank version of the 4.2 liter cadillac motor
=QUOTE

Seems just exactly right. Why not the least displacement and maximum output? Chevy has rights to the ilmor engine and the current IndyCcar powertrain. They must have disassembled the Ferrari and Mclaren and know what there is to be known from that.

Why then are we anticipating large displacement 5.5 and 6.2 liter. GM don't do small?, has not? or can't do small?

[meyerweb]

Why then are we anticipating large displacement 5.5 and 6.2 liter. GM don't do small?, has not? or can't do small?

Cost. The existing pushrod is cheap to build. A high performance DOHC engine will be more expensive, both in R&D costs and build costs. As most of us think GM wants to hold the line on cost, the entry level model will retain the pushrod V8. HIgh tech engines will show up later in higher performance models.

[Boomer]

A tried and proven V8 6.2 will be fine with me in the 2020 ME. I will be sufficiently "blown away" with "shock and awe". While I don't like surprises, I bet it will be "awsome(sp)? shocking? amasing(sp)? breath taking". I don't "dream about a DOHC" but I do look forward to it in my 2021 CT6.

[SheepDog]

HIgh tech engines will show up later in higher performance models.

That is probably correct. Sounds like what to think to avoid being wrong, after it is known in a few weeks. And I want all interested people to get what they wish.

But, I am holding hope for the improbable. That's where the fun is. There is a lesser degree of probability that they might go to a double overhead valve engine for the entry car.

They have it and will use it in the caddy and in later ME vets.
The more it is used it the less it cost, going forward.
The development cost has already been incurred for the new engine.
And GM needs to know how it will work in the wild under garden-variety daily abuse before it is placed in a high-end variant with a $20K, $30K, $50K, $100K price premium.
The Z06 ran hot and there was a cost to that. That was a classic type pushrod. An upgraded pushrod is not a slamdunk. There is uncertainty there.


If the pushrod engine is used, then it is likely modified to deliver maybe to 550 HP, with different hardware attached to fit in the mid-location, and that will cost ---- something. And there will be a cost associated with making the transaxle work with both the pushrod and later the high tech engines. And the mounting and engine cradle may be different and cost ----something.

So it is not necessarily a linear calculation. The more complex the cost comparison between the two engines, then the more it swings toward the high tech engine. The future.
If the classic pushrod engine is used, then for how many model years would it be carried forward? A few? Permanently? Introductory only? Undetermined? That's all about uncertainty or complexity and, to me, it tilts toward . . . . Bring on the future.

[Boomer]

If the classic pushrod engine is used, then for how many model years would it be carried forward?

I would think the base C8 engine would continue for a while. Not completely sure of your argument. Why can't GM "Bring on the future" with the DOHC as a ZO6 type while the "base" (most sales) continues?

[JB]

I love the fact the ohv corvette engine is a derivative of the truck engine lineup...

the motor is favulous in power to weight, tq, size, fuel efficiency and performance...

tons of tq and hp throughout the rev band,,and its durable as well as inexpensive...

if i wanted an overcomplicated fragile dohc motor...id buy a bmw...lol

kidding as im sire gms dohc v8 for corvette will be better than the horrible northstar debacle..

[meyerweb]

I think Boomer's take is probably correct, but all any of us can do now is speculate.

A DOHC V8 will always cost more to build than an OHV engine. Just a lot more parts, and more complexe assembly. As for R&D, Caddy's prior chairman said the new Caddy V8 won't be shared with any other division. I still think the basic design will be shared, but probably not as a hot vee design, which means different intake and exhaust, different turbo plumbing, maybe different displacement, different heads, different cams. All of which requires R&D, performance testing, endurance testing, EPA certification. All of which costs money. Lot's of money.

[SheepDog]

I would think the base C8 engine would continue for a while. Not completely sure of your argument. Why can't GM "Bring on the future" with the DOHC as a ZO6 type while the "base" (most sales) continues?

Boomer, should something spectacular be expected for the reveal. If not he body style, which we pretty much think we know, then there is the power train. But what else?