Is our VQ a very inefficient engine?
Originally Posted by FaSSt2001
Oh...believe it. This was one of the main selling points since the specs were revealed. This is straight from the Chevrolet website:
Inside every Z06 is an LS7 aluminum–block V8. It puts out a SAE-certified (Society of Automotive Engineers) 505 hp and 470 lb.–ft. of torque. Hand–built by the GM Performance Build Center in Wixom, Mich., the LS7 engine contains a litany of racing–derived components, such as an eight–quart dry–sump lubrication system, titanium valves and connecting rods, forged–steel crankshaft with six–bolt main bearings, high–profile cam, and Computer Numerical Controlled (CNC) machined heads for better air/fuel flow. Even with its performance, the engine does not incur a federal government gas–guzzler penalty.
Ed
Inside every Z06 is an LS7 aluminum–block V8. It puts out a SAE-certified (Society of Automotive Engineers) 505 hp and 470 lb.–ft. of torque. Hand–built by the GM Performance Build Center in Wixom, Mich., the LS7 engine contains a litany of racing–derived components, such as an eight–quart dry–sump lubrication system, titanium valves and connecting rods, forged–steel crankshaft with six–bolt main bearings, high–profile cam, and Computer Numerical Controlled (CNC) machined heads for better air/fuel flow. Even with its performance, the engine does not incur a federal government gas–guzzler penalty.
Ed
im even more impressed by it now
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From: Albuquerque, NM
Originally Posted by EZZ
I bet the LS7 is more expensive than the VQ 
It is amazing how they keep the gas mileage pretty high with the high horsepower V8s. When I first saw the G's rating, I was shocked because my Camaro SS had a better rating (or the same rating, I can't remember). The SS did get amazingly good gas mileage for what it was and the way I drove. I'm sure I won't be getting optimal gas mileage when I get my G either as I'm an aggressive driver. I just hope the gas mileage doesn't turn out to be as low as some of these numbers I'm seeing.Ed
Originally Posted by g35audioman
I believe that during normal driving conditions, the corvette engine shuts off 4 of its 8 cylinders in order to improve gas mileage. I remember reading that somewhere, but i could be wrong.
Vette's have a skip-shift feature that forces you to go from 1-4 when driving like a grandma. It also has a very tall 6th gear that helps fuel mileage. I think it runs at 1800rpm in 6th while driving at 80mph. My 6th gear is at 3000rpm at 80.
5th and 6th gears in the gto, vette, and CTS-V are both overdrive gears, 4th gear is 1.0 ratio - which you dyno in. I get 22 mpg in my auto 04 gto, with the cruise on 82. My 05X gets the same mpg on the highway with the cruise at 82 also - kindof sad actually that the less powerful, lighter X, - with one more gear in the auto trans gets the same gas mileage as my A4 gto. And I had to pay a gas guzzler tax for the gto, but not the X....I wonder why....
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From: East Tennessee
Originally Posted by JPJ
Both the standard Corvette (400 HP) and the Z06 (500+ HP) are not subjected to gas guzzler tax (no other 400+ HP sports car can claim this) and both achieve real world highway mileage approaching 30 mpg.
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From: Minnesota
If the LS engine is about the same weight, has better gas mileage, and is more powerful, what's the point of developing more "sophisticated" engines like the VQ (V6) or the VK (V8)? I know pushrod is old technology, but it doesn't appear to have any downsides and has much upside compared to the "high tech" engines in this case. I sure as hell wouldn't mind having a Corvette engine in my G. More power and better gas mileage. Can't beat that.
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From: Bay Area
Originally Posted by P_Diddy
That is wrong, Vette's don't have cylinder de-activation.
Vette's have a skip-shift feature that forces you to go from 1-4 when driving like a grandma. It also has a very tall 6th gear that helps fuel mileage. I think it runs at 1800rpm in 6th while driving at 80mph. My 6th gear is at 3000rpm at 80.
Vette's have a skip-shift feature that forces you to go from 1-4 when driving like a grandma. It also has a very tall 6th gear that helps fuel mileage. I think it runs at 1800rpm in 6th while driving at 80mph. My 6th gear is at 3000rpm at 80.
So do you think it would work if we shifted 1-3-6? There is another thread that shows idle speeds for shifting, and under normal driving it's about 8mph. By this info I think we can shift in a 1-3-6 pattern and improve gas mileage right?
Hooman
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From: San Diego
Originally Posted by GX9901
If the LS engine is about the same weight, has better gas mileage, and is more powerful, what's the point of developing more "sophisticated" engines like the VQ (V6) or the VK (V8)? I know pushrod is old technology, but it doesn't appear to have any downsides and has much upside compared to the "high tech" engines in this case. I sure as hell wouldn't mind having a Corvette engine in my G. More power and better gas mileage. Can't beat that.
Which would you rather have a 4.0 L V8 making 400 hp or a 6.0 V8 making 400 hp? Granted power delivery will be different with the 6.0 having a little more torque, but the 4.0 probably having a 7500 rpm redline
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From: Utah
The 1st to 4th gears is if you are less than 20% throttle or 2500 rpm. I had a LS1 Camaro. I averaged 14 mpg in the city and 27 mpg on the freeway, which isnt tough when you are only at 2000 rpm in 6th gear at 80 mph.
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import motors = less weight, better handling, worse fuel efficiency, better power to displacement ratio, less torque,
pushrods = heavy heavy, usually worse handling due to weight, better fuel efficiency, less power to displacement ratio, sexy torqueness.
pushrods = heavy heavy, usually worse handling due to weight, better fuel efficiency, less power to displacement ratio, sexy torqueness.
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From: Temecula - French Valley, Ca
It's all the power to weight ratio. Besides, I drove to Las Vegas. averaged about 92 mph. And still got 21 miles per gallon. Matter of fact, I'm going to Vegas on a business trip on the 11th. We'll have to see how the mileage looks this time around.
Later,
Ray
Later,
Ray
