Motor Trend: DOHC LT6 Engine in 2023 C8 Corvette Z06: Details and Power.
- Thread starter wemay
- Start date
There was a bunch of power left in the old design with a new set of heads and bump stick.
620 was easy to get with a pretty tame idle out of new heads and a bumpstick.
Sure, if emissions are not a concern
I've never seen one fail a california smog check. Typically modded rigs fail the "visual inspection".
Guys buying high end rigs most often pay the guzzler fee (which the vette avoided a long time and may still) and have little interest in saving manatees.
That's not really the point, GM has to get the car through federal emissions in order to sell it.
Im pretty sure its a two part issue with lifespan being sacrificed to get the desired emission.
What happens with really high performance 2 valve smog engines is you end up with steep ramps to get lots of lift in a short time, long duration, then slam them shut and you end up with mills that are hard on valves, guides and springs.
You may get to the end of a 3 year warranty, but getting to 5 is going to cost them a bunch of money as you'll need to pull the heads and do the guides, or you may grind lifters flat.
You can fix a bunch of this going to a bigger mill, or allow a bit more overlap, but overlap equals emissions.
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4WD
$50 site donor 2024
This makes no sense and you know it … this engine will evolve but no need to over-stress it now …
Car companies race to sell cars … Exotics sell cars to race. It’s a Chevy …
BTW: Check the displacement limit on these engines …
Corvette C8R - Search Videos
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This makes no sense and you know it … this engine will evolve but no need to over-stress it now …
Car companies race to sell cars … Exotics sell cars to race. It’s a Chevy …
BTW: Check the displacement limit on these engines …
Corvette C8R - Search Videos
www.bing.com
Not following you?
Agreed they want some room to grow so they aren't going to front end it.
Sure in racing you have to fit into brackets and or engine sizes,
I'll check the vid out...
4WD
$50 site donor 2024
IMSA limits size … so they’ll play with this lighter 5.5L on/off track in the upper offerings …
The 6.2L is certainly more affordable street power and hopefully remains in the GS etc …
Some are not going to like a Vette sounding like a Stihl
4WD
$50 site donor 2024
Think GM have been running some 5,5L posing as Caddy engines starting a few years back
5.5L is actually large in the flat crank arena
sportscar365.com
5.5L is actually large in the flat crank arena
Cadillac to Debut Updated 5.5-Liter DPi Engine – Sportscar365
Cadillac to roll out with smaller 5.5-liter V8 powerplant for IMSA WeatherTech SportsCar Championship season...
sportscar365.com
IMSA limits size … so they’ll play with this lighter 5.5L on/off track in the upper offerings …
The 6.2L is certainly more affordable street power and hopefully remains in the GS etc …
Some are not going to like a Vette sounding like a Stihl
The last flat plane crank car I drove was this gt350R.
Totally laugh out loud fun - but a buzz box, long freeway trips would suck.
I hope chevy gets that part squared away.
I'm not hung up on sound.
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Yep. I'm up to my eyeballs with dismay about how auto enthusiasts are pissing their pants about flat-plane cranks. I'm really tired of hearing about them, and every time I argue with some such enthusiast, they accuse me of being against "new" technology. Then I point out that flat-crank V8's go back to the 1940's (Ford GAA), and were in every Cosworth DFV built since 1967.
"Yeah, but, even breathing from bank to bank." I can point out plenty of 2-plane crank V8's that also make 2hp per cubic inch. It's a matter of proper intake manifold design.
I think the flat crank thing in the LT6 is more a matter of positioning the Z06 in the market to be a 1/3 cost Ferrari. I think that's a mistake on their part, but it's their company. My opinion is that Corvettes should THUNDER, not buzz. When GM started racing the C5 at LeMans 20+ years ago, the Europeans loved the thunder of the 6.0L engine. It's what made the Corvette so American.
Here is the Hagerty article link in the case anyone wants to read it too.
www.hagerty.com
13 details to know about the Z06's 670-hp LT6 V-8 - Hagerty Media
When it comes to the 670-hp LT6 V-8 on the new C8 Corvette Z06, Chevrolet assistant chief engineer Dustin Gartner tells all.
www.hagerty.com
This guy did a great job of articulating it....
Flat-Plane Silliness: How a Crankshaft and a Press Release Duped the Media
All I want for Christmas is a flat-plane crank. Everyone’s talking about them.
www.linkedin.com
"But here’s the thing. My wife’s minivan has a flat-plane crank. The mail truck that delivered my delinquent HOA bill this morning has a flat-plane crank. Every ricer that ever put a fart can on his Civic has a flat-plane crank. Even my three-year-old daughter’s bicycle has a flat-plane crank. Mind you, this is a machine so fierce that only training wheels can harness its fury. How is it possible that these flat-plane-crank-equipped technical marvels somehow flew beneath the radar? That’s easy. Before “flat-plane crank” became a sexy new catchphrase, no one cared if an engine’s crank was flat, quasi-flat, semi-flat, kinda flat, or not flat at all."
Its marketing buzz right now BFD.
I know a guy that creates his own engines from billet blocks and does custom firing orders and I asked him outright why not flat plane and his remark that he already tried it and it didnt buy him anything by the time he damped out the vibration elsewhere. Ina race car where you dont care about that stuff it might buy you a little, but in anything you have to spend significant hours in - it stinks.
The GT350R is like this - awesome for a blast in the canyons, but supper buzzy when you are winding it.
To me this one of those subject that have gone on forever like the 4/7 firing order swap.
I get the same flack for my preference of large vs high winding.
Like you said the vette guys are shooting for the ferrari hp/L benchmarks.Which is admirable, and very cool, just not as cool to me as huge super well balanced mills that pump out tons of TQ everywhere starting at idle.
If the flat plane multi valve mill gave me that power curve Id like it better, but it doesn't.
This isnt a this one is great and that one sucks thing for me - they are ALL super cool and fun. I just have a preference.
the voodoo sounds similar to the average V8, nobody dislikes now it sounds. it’s apples to oranges
You mix 5w20 with 5w30 and you get 5w50.
Still haven't seen a 59K C8.......