1.47 HP/Cubic Inch
05-08-2013, 07:47 PM
#42
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St. Jude Donor '09
Just wanted to post something new.
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05-08-2013, 07:48 PM
#43
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6.2L Mercedes engine has 622 horsepower. So why doesn't the GM 6.2L LS3 or LT1 have 622 horsepower? They are both normally aspirated and have the same displacement and both have VVT and DI.
It's more than just HP/L that determines how an engine is designed and for what application..
It's more than just HP/L that determines how an engine is designed and for what application..
If you really want to do that to the vette engine, it's 100% possible. But then you're down to 14mpg and an engine that cost $$$$$ to build and maintain. Not sure why the torque rating on that thing barely beats a vette at 468ft/lb.
Want more HP with the same 6.2L displacement? Put some E85 in your gas tank.
Last edited by vankenn; 05-08-2013 at 07:53 PM.
05-08-2013, 07:54 PM
#44
Melting Slicks
Interesting, one valve per cylinder. Would that be a steam engine? Probably a lot of guys would complain b/c it would sound funny and run on pellet fuel.
05-08-2013, 07:58 PM
#45
Drifting
05-08-2013, 08:12 PM
#46
Le Mans Master
05-08-2013, 09:14 PM
#47
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I don't think you can tell anything based on other GM engines. The new Silverado 4.3 gained 95 hp and 30 ft/lbs. The 5.3 only gained 30hp but 50 ft/lbs.
I'll be suprised if the Vette is rated over 460hp. It seems to me that GM has tuned these engines for torque and fuel economy over peak hp. That said, maybe we'll see 470+ ft/lbs.
I'll be suprised if the Vette is rated over 460hp. It seems to me that GM has tuned these engines for torque and fuel economy over peak hp. That said, maybe we'll see 470+ ft/lbs.
05-08-2013, 09:34 PM
#48
Safety Car
The last time Jim posted what amounts to the exact same thread I said 465 to 470. Same guess this time. And yes I do mean both. I'm thinking they will claim a few ponies for the freer flowing cans like they did with C6. In terms of the grand strategy I think that gets them a decent bump over the C6 while still keeping some in the bank for that inevitable mid cycle revamp while making the leap to the Z06 (by whatever name) easier to obtain by putting the number in the upper 500s.
05-08-2013, 09:38 PM
#49
I don't think you can tell anything based on other GM engines. The new Silverado 4.3 gained 95 hp and 30 ft/lbs. The 5.3 only gained 30hp but 50 ft/lbs.
I'll be suprised if the Vette is rated over 460hp. It seems to me that GM has tuned these engines for torque and fuel economy over peak hp. That said, maybe we'll see 470+ ft/lbs.
I'll be suprised if the Vette is rated over 460hp. It seems to me that GM has tuned these engines for torque and fuel economy over peak hp. That said, maybe we'll see 470+ ft/lbs.
05-08-2013, 09:40 PM
#50
Drifting
05-08-2013, 09:58 PM
#51
05-08-2013, 10:01 PM
#52
Unfortunately GM is too dumb to actually make the car with even 500hp from the factory. This WILL hurt sales quickly on the car once the early adopters get their units filled.
I would have bought a 500hp coupe, but now I have to wait for a higher hp model and pay way more money for it because they chose to sandbag so badly on this engine.
I would have bought a 500hp coupe, but now I have to wait for a higher hp model and pay way more money for it because they chose to sandbag so badly on this engine.
P.S. Only a small group decide their purchases on HP alone. Most decide based on the entire package.
05-08-2013, 10:18 PM
#54
05-09-2013, 09:06 AM
#56
Le Mans Master
05-09-2013, 10:31 AM
#57
Le Mans Master
Comparisons of specific output between 2-valve and 4-valve motors are irrelevant.
The displacement of street motors is effectively unlimited, so engineers can make intelligent trade-offs instead of ones intended to maximize specific output, which is of no practical benefit.
The displacement of street motors is effectively unlimited, so engineers can make intelligent trade-offs instead of ones intended to maximize specific output, which is of no practical benefit.
05-09-2013, 11:27 AM
#59
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Remember the vettes ohv design only has variable cam phasing, not vvt like a dohc motor can alter intake and exhaust lobes separately creating more or less overlap.
05-09-2013, 11:31 AM
#60
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Nor does duration and lift change like some vtec
