d16dcoe45

Whether or not it uses DOHC or uses pushrods has zero to do with how much low end torque an engine has. Low end torque is determined by camshaft, intake manifold design, cylinder head design and valve curtain area. You can easily tune a 4 valve head to make a surplus of low end torque and have it peter out at 5500 rpm. The whole reason 4 valve heads are mostly used to make high rpm power is because they can and they are easily suited to. Small lightweight valves with no heavy pushrods, direct acting or finger follower valvetrain and the ability to use small duration, low overlap cams and still make great high rpm power (thanks to the large intake valve area) The intake valve curtain area of two small valves is greater than one large valve and because there are no pushrods you can then take advantage of that area by revving high without using excessively heavy valve springs which wear out parts, have immense friction, and need replacemen at regular intervals. And because 2 valve heads are intake valve limited, they need to use large duration, big overlap cams as a crutch--which means terrible drivability and low rpm response in exchange for power above 6000. There is no inherent advantage that leads to pushrods making more torque, it is just that manufacturers have always tuned them that way because NA 2 valve engines are almost ALWAYS limited by intake valve size. They can almost never have a large enough intake valve--which is why splayed and canted valve chambers make big power 2 valve NA--you can stuff a much larger valve than you can in an inline wedge.

As an aside, look at the Tundra DOHC V8 and the Nissan Titan 5.6--both 4 valve designs that make immense low end torque and I doubt rev much over 6000 rpm.

Dominic Sorresso

According to Reuss that’s why GM cancelled the Volt. I own a 2017 and believe GM could have continued to evolve it as an answer to EV vehicles in urban areas that was well suited for a transitional period as we migrate towards full EV.

GrandSport 2017

LMFAO

I'm in the same camp..... nope.

GrandSport 2017

You guys may think I intentionally tease on here but I never get the full picture either. Not even close to it.

Villain C5

I Just am looking for any info I can get (non-electric related). I have an allocation coming up but if I knew June would be a GS or 2024 would have a engine or HP upgrade I'd wait.

lewislgZ06

Ditto!

undecided1965

But I jumped on an allocation already. I hope I don't regret it.

Innovated

How did this thread die out ? Some great info here. Is there an updated thread ?

CPhelps

I'd say it died out b/c the people with hints have already given them and GM hasn't released anything yet, so there's nothing new to talk about.

TTc8HTC@gmail.com

It died out, because this engine is 100% BS for the C8. Quote me.

Racer X

As requested.

combatninja

I'm holding out hope for a 575-600hp C8 but I think it is far more likely that this power plant debuts in the trucks first and then the C9 in 2028-29. What would be interesting is to see if the engineers could get proper traction management with that kind of power level with the 305s on the back of the Stingray. They may have to go up to a 315 or 325 and/or detune the engine in order to balance the power and grip for the 0-60 time of 2.8 that everyone will expect/demand. I'd still be fine with a 550hp naturally aspirated Corvette that could rev to 7000+ with a warranty.

undecided1965

Not June yet.

ZR1Dogan

Bump that weight to "a little over 4000lb" (to be realistic/achievable) + add plug-in capability, then implant the power system in a small/mid-sized luxury SUV: Yea, I'd buy it - For my wife's DD.

In a Corvette: HARD PASS.

smoove7410

June starts tomorrow --- still a go for new options next month?