Corvette Hybrid DOHC

I don't think the 5.5 DOHC will make 600 lb*ft torque, probably more like 470-475. I've been rooting for 650 hp, though. If they can get 410 lb*ft at 8000 rpm, that would be 625, so it would be in the ballpark. If they make less than 650, people will think they're going backwards from the C7 Z06.

I have been watching IMSA races all year, where they are running the C8R with the 5.5 DOHC flat crank engine. I hate it. It emits an annoying buzz for an exhaust note. I think GM is trying to emulate Ferrari with the flat crank engine. That's just wrong. CORVETTES SHOULD THUNDER, NOT BUZZ. Put a crossplane crank in that thing.

If the aftermarket tuners can develop a supercharged small block package with 650 hp, they could sell a lot of them. GM has left a hole in their engine lineup.

What do you think of the recently-discontinued Mustang Shelby GT350 Voodoo flat plane V8?
 
What do you think of the recently-discontinued Mustang Shelby GT350 Voodoo flat plane V8?
I think it was Ford experimenting with engine technology in a limited production application. The uniqueness of the Voodoo engine will make the GT350's instant collectors items. But Ford didn't propagate the flat crank to the supercharged Shelby GT500, and nobody in the enthusiast press complained about that. I wonder if GM is going to put a 2-plane crank in the twin-turbo version of the 5.5 DOHC.
 
What do you think of the recently-discontinued Mustang Shelby GT350 Voodoo flat plane V8?

The GT 350 and it's flat plane crankshaft add up to an amazingly fun car. That's an engine with real soul. No, it's not amazingly or significantly faster than a standard GT with the 5.0, but it is a satisfying mid-low 12 second car with a 115-118 mph trap speed at the local strip. But the GT350 is just a flat out responsive blast of a car.

I really do love the Corvette, and there is no question of it's track superiority. But the GT350 is in my opinion, much more enjoyable due to it's lively nature. I'm not claiming exhaust note or other things as the reason for this. It's the entire loud, tight and instant nature that make the Shelby an enthusiasts favorite.
 
Basically a 1K/1K mill. Turbo small block.

That ought to dole out some smackdown to the exotics.

No need for DOHC at this level, the windmill gets you there.

Its also got a few hundred more to go if they want o turn it up over the next few years with minimal changes.
 
I'm a Ford enthusiast, but I'm also excited to see the GM 5.5L DOHC when it gets released.

No way it's going to make 600 lb.-ft. though. The 5.0 Coyote makes 420 and it's a very highly developed engine. I would expect the GM 5.5 to make 475 or a little more, but not 600! Excited to see it though.
 
I'm a Ford enthusiast, but I'm also excited to see the GM 5.5L DOHC when it gets released.

No way it's going to make 600 lb.-ft. though. The 5.0 Coyote makes 420 and it's a very highly developed engine. I would expect the GM 5.5 to make 475 or a little more, but not 600! Excited to see it though.
Meh. GM was making @475 back in 2006 with a 100k mile warranty.
 
Put me down for the grandsport hybrid with the pushrod engine. The simplicity of the LT series is what i like. A bunch of cams, chains, turbos, and dubious quality does not excite me.
 
Sure, but with a much larger engine.
It's good to note, again, that the Chevy V8's are very compact and light. The fact that displacement is larger means little to nothing. Consider that light aircraft engines are classed by HP and to a large extent HP to weight and not displacement. I see no reason why a GM 6.2L engine that is both lighter and more compact should somehow be inferior to a much larger and much more complex technical tour de force. Especially when DETUNED and DOWNSIZED variants of that pushrod V8 continue to win world class road race events.
 
It's good to note, again, that the Chevy V8's are very compact and light. The fact that displacement is larger means little to nothing. Consider that light aircraft engines are classed by HP and to a large extent HP to weight and not displacement. I see no reason why a GM 6.2L engine that is both lighter and more compact should somehow be inferior to a much larger and much more complex technical tour de force. Especially when DETUNED and DOWNSIZED variants of that pushrod V8 continue to win world class road race events.
And they are not top heavy …
 
Out of the models on the list, the 2024 ZR1 is most appealing to me. Something about 850 hp TT without the hybrid stuff.

+1. I guess I’m too practical, but to me, corvettes are low mile use, keep forever cars. Lots on the market with low miles. Since the batteries will age and be a liability, and at some point perhaps be obsolete, it creates a different consideration....

That's it in a nutshell! Not only will this compete with the exotics you can buy one for you and one the wife and get change.

Perhaps this is a dumb question, but it seems like many associate Corvettes and GM power in general with good pushrod engines. So why is DOHC so critical here/in your assessment? Ability to achieve higher RPMs?

It would seem to me that achieving the hybrid numbers with a (smaller overall footprint and weight?) pushrod engine would have fit more into the GM high end v8 development scheme... but what do I know?
 
It's good to note, again, that the Chevy V8's are very compact and light. The fact that displacement is larger means little to nothing. Consider that light aircraft engines are classed by HP and to a large extent HP to weight and not displacement. I see no reason why a GM 6.2L engine that is both lighter and more compact should somehow be inferior to a much larger and much more complex technical tour de force. Especially when DETUNED and DOWNSIZED variants of that pushrod V8 continue to win world class road race events.
Sorry about that, I just meant larger displacement. The current Chevrolet V8s are compact, lightweight, and make outstanding power.

5.5 liters of DOHC power is going to have to be very trick to outperform current offerings. I could see 600HP, but I don't think 600lb.- ft. is realistic naturally aspirated.
 
It certainly is on both counts. This puts the Corvette into a different world, I have a feeling other supercar makers are not going to be sleeping good.
I agree that the Zora name is fitting, but GM still makes it with the usual parts bin crap for many components. Not a supercar in my eyes, look at the Pagani Zonda or Huayra, meaning wind, that's super to my eyes. watch the testing at AUTOCAR, price 1 million euro's oops
 
+1. I guess I’m too practical, but to me, corvettes are low mile use, keep forever cars. Lots on the market with low miles. Since the batteries will age and be a liability, and at some point perhaps be obsolete, it creates a different consideration....



Perhaps this is a dumb question, but it seems like many associate Corvettes and GM power in general with good pushrod engines. So why is DOHC so critical here/in your assessment? Ability to achieve higher RPMs?

It would seem to me that achieving the hybrid numbers with a (smaller overall footprint and weight?) pushrod engine would have fit more into the GM high end v8 development scheme... but what do I know?

Agreed.

You cant pull a hybrid out from under a tarp after 50 years fresh the fuel and oil and go have a ball.
The car will be bricked over time.

I'd rather have a seen a high displacement solution - an all alloy big block like my 725 / 840LB ft dead simple chevy based boat engine.

all that little high revving stuff isnt the same.
 
What do you think of the recently-discontinued Mustang Shelby GT350 Voodoo flat plane V8?

Awesome .

I got a good buddy with a GT350R - its a real hoot and had me laughing like a kid.

I borrowed it for an afternoon and barking the rears on a hard 2-3 upshift was specifically entertaining.

For pure tomfoolery combined with outright hooliganism its hard to match.

Its also a buzz box and not what Id want for a long high speed run like a vet will give you in a "spend all day on the 5 freeway"
 
Said GT350 R. Super fun.

IMG_0723.webp
 
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