JerryU

Funny, would think you could not find a Old Gear Head (76) like me who believes "nothing beats cubic inches" saying bring on a small cid dual turbo, double overhead cam engine in the C8!

Started with a "hopped up" flathead in my 1st car a '41 Ford Opera Coupe. Not fast enough so put every dime I made in my part time supermarket job stuffing in an Olds engine, bored 1/8 inches for '56 pistons, 3/4 race cam and biggest 4 barrel available at the time. It was quick. Built that engine in the basement. When I semi-retired 18 years ago assembled a 502/502 BB from some 30 boxes in my garage for my ProStreet Rod. Yep the V8's I've had in my 5 Vettes have been great BUT GM needs to get modern with a more efficient engine- NOT for our gas mileage-I'm sure most of use could care less-BUT for their corporate MPG Goal!

First, you need a double overhead cam so you can adjust intake and exhaust timing separately. Yep GM did a good job of getting what they could changing both at the same time in the LT1 BUT that is a compromise for max efficiency. Might as well get the power with 4 valves per cylinder and twin turbo's that can use some of the ~30% wasted energy going out the exhaust. Yep supercharging is fine for making power BUT it takes power to operate and does not use that wasted exhaust energy. Heck the Ford GT makes 647 hp from 3.5 Liter engine- GM can as well- even at least 3 hp more as their marketing folks are smarter (647hp???)

Now in fairness, I'll still have the set back 502 cid BB in my ProStreet Rod with 53% of it's 3000 lbs on those rear 16.5 inch section width Mickey Thomspons!

Pic of 41 Coupe from a 1960 High School Paper! Street Rod mostly goes to shows, can't drive too far on a small tank getting ~10 mpg!



PS: Can't really call the 1.6 Liter, 800+ hp F1 engine a hybrid! That electric motor/generator with its small battery weighs ~60 lbs! Love to have that 160 extra hp for 10 seconds (which is all it can deliver) in a Vette for take-off! That is where most gas is wasted and is all that would be needed until you reached ~50 mph for normal driving. F1 no longer allows refueling and they are beating the best prior lap times in the same race circuits when they had over twice the size V8's an V10s!

JerryU

Let's sure hope that the "halo C8" doesn't just have an old technology pushrod V8! They are building the 4.2 Liter Blackwing in BG (lower cid, less friction loss and cylinder size so less of the ~30% energy wasted going into the coolant) double overhead cam (with independently variable intake and exhaust timing to optimize mpg at low rpm and hp at high rpm- can't do that with one cam-for a reason) that employs turbo's that use some of the ~30% wasted energy that goes out the exhaust.

Heck the 2019 Alfa 4 door sports sedan has a 2.9 Liter engine providing 505 hp! 4.2 Liters is plenty and there is already a 550 hp version. The Ford GT is getting 647 hp from it's 3.5 Liter engine! In fact, F1, that runs on gasoline, uses a 1.6 Liter engine producing 800+ hp! They have more than doubled the mpg and still besting older much larger cid race times. The Car World is changing rapidly. We need a modern, albeit more complex, ICE to put off an "EV only" Vette!

Walter Raulerson

No way GM would do that...…..I don't think

JD_AMG

You're like a broken record for misinformation and blind bias.

WHY DOES THE CORVETTE GET BETTER GAS MILEAGE THAN COMPETITION DESPITE HAVING LARGER DISPLACEMENT THEN!?

Zaro Tundov

This!

FPC sound cool and they're fun to rev to the stratosphere on a track, but they have no place on a regularly driven street car. Above all, they nullify one of the V8's greatest attributes: low vibes. Even in healthy individuals, long duration exposure to engine vibrations can induce a vague sense of discomfort and unease. For those with neck or back problems, forget about it, a FPC C8 would be a torture chamber.

As for the V6 speculation, there is no way in holy hell GM will put anything other than V8 in the C8. Juechter would resign rather than sign off on such a travesty. Could there be some V8TT IVERs on public streets? Maybe, but like others have suggested, cylinder deactivation is most likely what some of you are hearing.

Zaro Tundov

The rumored LT1 successor will put down more power, have better throttle response, a more linear torque curve, better fuel economy, and silky smooth revs. Why would you give all that up for a buzzy V6TT that breaks down before reviewers can finish their testing?

BIG Dave

Cadillac President Steve Carlisle says “NO”.
https://www.automobilemag.com/news/c...win-turbo-v-8/

JerryU

Because it’s “rumored” the Blackwing with it’s double overhead cam, independently variable intake and exhaust valve timing when set for max mpg in the EPA test, considering it’s 32% smaller cid and it’s use of some of the wasted exhaust gas gets 25 City and 33 highway mpg! Understand all the “buzz” from the high tech engine drowns out the tire and road noise.

Now if you never get near the 1.2” “g” lateral acceleration spec you can get the upscale model called “Easy Chair” because with it’s soft suspension, all-season tires on guaranteed for life not to crack, cast aluminum wheels, it’s like sitting in an Easy Chair! But be prepared for the $30,000 premium over the base “for performance only folks” model selling for $70,000!

Zaro Tundov

He just means the hot V V8 engine called "Blackwing," code LTA, won't show up in another GM brand.

The C8's V8TT will likely be based on the same architecture as LTA, but probably in a larger displacement with reversed heads and a brace of side mounted turbos. The hot V configuration is just for packaging in between the strut towers on a front engine rear drive vehicle. With the engine in front of the rear axle/suspension, there's no problem fitting the turbos close to the exhaust valves for minimum lag.

Zaro Tundov

I can't even figure out what your point is.

Yarbie

I love my big bad LT1 motor, sounds like a freight train coming and runs like one too.
These tiny new engines crack me up. So European and not American muscle.
Those days are over with these new mini motors. They might be powerful but they aren't American muscle.
It's a new day and very soon they'll all be gone. So sad.

mschuyler

Why would he say this, and why in such a pugilistic fashion? He's President of Cadillac, not GM, and if GM thinks it's a good fit (including the fact it is built at Bowling green) I would think he is at risk of following his predecessor out the door if he remains so uncooperative. Besides, what's the point? Why does he care and who cares if he does?

JoesC5

I'm willing to bet that before he was considered for the job, while he was being considered for the job, and after he accepted the job as head man at Cadillac, Steve Carlisle knew exactly the position that those above him had about where the Blackwing would be utilized. He made the statement AFTER he accepted the job, so I'm betting he has more knowledge about what is going on within GM than you do.

If no one gives a ****, why is it being discussed after being published on national coverage.

ojm

Sure hope have not waited all this time for a base C8 to be a V6 , would not even consider a purchase.

And small litre engines in muscle cars is rather absurd.

JerryU

Hmm, how do you feel about the 3.5 Liter, 647 hp engine in the Ford GT! Or perhaps you haven't looked at it because of the big bucks!

I look at it this way, the future for a new sports car (been my DD for 5 Vettes) is smaller cid, double overhead cam, turbo engines OR EV's! I'll take the ICE!

If you feel strongly, might consider what I did: Build a Street Rod and put in a NA 502 cid BB! Actually today you can buy a 572 cid engine with 650 hp! Now that's a stump puller!

Dethsupp0rt

Since when is the Corvette a muscle car?

ojm

Could be a plan, have one low mile car could work on. Though the V8 gt engine is still tight.

If the C8 is promised the HP we hear, it has lot of muscle, heck even the old 350 engine had some go in their days, not a GTO but could not afford one. When I drove my brother's it kind of scared me.Had the old C3's easily over 110mph on highway.

mschuyler

I'm certain that he does as well and I never suggested otherwise. I'm just puzzled why he would react so strongly or, as you suggest, why those above him would do so, making him safe. Usually a high level executive need not answer so defintively. It's not in their best interests to do so, in case plans change. Why "over his dead body"? Why would he have such a vested interest here? Even the headline caught this. "Mine, mine, mine!" it said. Why the proprietary ownership here? GM has a long history of cross-pollination, including the Corvette engine in the Cadillac, and here the Blackwing is made in Bowling Green. Taken altogether, this makes no sense. Quite obviously he feels safe here or he never would have said such a dramatic thing. What is really going on here? THAT'S my question.

JD_AMG

Link to claims?

Warp Factor

Always has been, depending on engine choice.

Except maybe for the short time that it was only available with a straight 6 and a 2-speed automatic.