C 7 engine
Thread Starter
Racer
Joined: Mar 2008
Posts: 253
Likes: 5
From: StAugustine Florida
C 7 engine
My corvette club passed this info out the other day. Is this old news? There was a picture with it of a renditon I have not seen before but could not copy it.
By Drew Johnson
Seemingly confirming one of the worst kept secrets in the industry, a
General Motors insider has revealed that the next-generation Chevrolet
Corvette will be one of the first road-going vehicles to feature GM’s new
5.5L V8.
According to one of Motor Trend’s inside sources, the Corvette C7 will come
equipped with GM’s new 5.5L small block V8. The new mill will feature a
number of technical advancements — including direct-injection and a new
combustion system – but will retain its old school overhead valve design to
cut costs and keep the engine compact.
Power for the new engine will likely total 440 horsepower, which would be a
slight improvement over the 436 horsepower currently available in the C6
Corvette. However, thanks to the 5.5L’s smaller size and its advanced
features, expect a noticeable jump in overall fuel economy – improving on
the C6’s already impressive 26mpg highway rating.
Chevy’s new 5.5L has already made its world debut, appearing between the
fenders of the C6.R racecar. GM has also committed $890 million to
develop and produce the new small block. Expect to see the C7 Corvette in
2012.
By Drew Johnson
Seemingly confirming one of the worst kept secrets in the industry, a
General Motors insider has revealed that the next-generation Chevrolet
Corvette will be one of the first road-going vehicles to feature GM’s new
5.5L V8.
According to one of Motor Trend’s inside sources, the Corvette C7 will come
equipped with GM’s new 5.5L small block V8. The new mill will feature a
number of technical advancements — including direct-injection and a new
combustion system – but will retain its old school overhead valve design to
cut costs and keep the engine compact.
Power for the new engine will likely total 440 horsepower, which would be a
slight improvement over the 436 horsepower currently available in the C6
Corvette. However, thanks to the 5.5L’s smaller size and its advanced
features, expect a noticeable jump in overall fuel economy – improving on
the C6’s already impressive 26mpg highway rating.
Chevy’s new 5.5L has already made its world debut, appearing between the
fenders of the C6.R racecar. GM has also committed $890 million to
develop and produce the new small block. Expect to see the C7 Corvette in
2012.
Racer
Joined: Dec 2007
Posts: 354
Likes: 4
From: Grand Ledge Michigan
As my Ford engine Lead Engineer buddy says "massive amounts of torque" in this configuration. Check out Ford's Eco Boost V6 for an idea, add cubes and two cylinders. Do the math. He told me about these engines 6 years ago and I am still amazed.
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
I heard them talking about the 5.5 liter motor well over a year ago while watching the C6R's racing at ALMS. Its what engine they have been running ever since they switched from GT1 to GT2 class.
http://www.corvetteracing.com/cars/g...t2-chart.shtml
http://www.corvetteracing.com/technology-transfer.shtml
I just hope GM learned something about there new 5.5 Liter motor when both C6R's blew there motor at last years 24 hour Le Mans race in France ...
The No. 63 Corvette C6.R retired from the 24 Hours of Le Mans shortly after 7 a.m. this morning after completing 225 laps. Antonio Garcia was on his out-lap after replacing Johnny O'Connell in a routine pit stop when he reported a noise entering Mulsanne corner. Telemetry confirmed a problem, and the engine expired before he reached Indianapolis corner.
http://www.corvetteracing.com/histor.../lemans6.shtml
No. 64 Corvette C6.R retired with an apparent engine problem.
http://www.corvetteracing.com/histor.../lemans7.shtml
Toque
http://www.corvetteracing.com/cars/g...t2-chart.shtml
http://www.corvetteracing.com/technology-transfer.shtml
Where the C6.R and ZR1 differ significantly are in situations where GT rules actually prohibit the use of the more sophisticated ZR1 components. For example, the ZR1 is equipped with carbon-composite brake rotors, while GT regulations require ferrous (steel) brake discs. And, where the ZR1 utilizes a 6.2-liter supercharged\ V-8, the C6.R uses a naturally aspirated, production-based 5.5-liter small-block V-8.
The Corvette C6.Rs' engines are developed, built and maintained by GM. Designated LS5.5R, the naturally aspirated powerplant is based on the Corvette Z06's 7.0-liter LS7 engine (which in turn was developed with the 7.0-liter race engine used in the C6.R GT1 cars), and is built with a production cast-aluminum cylinder block.
Pending GT2 class regulations specify a maximum displacement of 5.5 liters. The reduction in displacement to meet this requirement was achieved by shortening the crankshaft stroke and reducing the cylinder bore diameter. In accordance with the regulations, the race engines have two 28.8mm diameter intake air restrictors. The LS5.5R engines are equipped with dry-sump oiling systems, CNC-ported aluminum cylinder heads with titanium intake and exhaust valves, and sequential electronic port fuel injection. The race engines use E85R ethanol racing fuel in the ALMS and E10 fuel in Le Mans.
The Corvette C6.Rs' engines are developed, built and maintained by GM. Designated LS5.5R, the naturally aspirated powerplant is based on the Corvette Z06's 7.0-liter LS7 engine (which in turn was developed with the 7.0-liter race engine used in the C6.R GT1 cars), and is built with a production cast-aluminum cylinder block.
Pending GT2 class regulations specify a maximum displacement of 5.5 liters. The reduction in displacement to meet this requirement was achieved by shortening the crankshaft stroke and reducing the cylinder bore diameter. In accordance with the regulations, the race engines have two 28.8mm diameter intake air restrictors. The LS5.5R engines are equipped with dry-sump oiling systems, CNC-ported aluminum cylinder heads with titanium intake and exhaust valves, and sequential electronic port fuel injection. The race engines use E85R ethanol racing fuel in the ALMS and E10 fuel in Le Mans.
The No. 63 Corvette C6.R retired from the 24 Hours of Le Mans shortly after 7 a.m. this morning after completing 225 laps. Antonio Garcia was on his out-lap after replacing Johnny O'Connell in a routine pit stop when he reported a noise entering Mulsanne corner. Telemetry confirmed a problem, and the engine expired before he reached Indianapolis corner.
http://www.corvetteracing.com/histor.../lemans6.shtml
No. 64 Corvette C6.R retired with an apparent engine problem.
http://www.corvetteracing.com/histor.../lemans7.shtml
Toque
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Drifting
Joined: Sep 2003
Posts: 1,726
Likes: 18
From: Brighton, MI
Drifting
Joined: Feb 2002
Posts: 1,260
Likes: 0
From: Chapel Hill NC
Utterly facinating
This is NOT a GM announcement, but interesting speculation. As Corvette usually has a small power advantage, I suspect for marketing reasons, do you suppose that the C7 will retain a 6.2 liter with direct injection and Vvt with say 480 to 500 hp, and better gas milage in the street version instead of the assumed 5.5 liter? Is this the Z engine with the 5.5 liter the regular engine? What happens when you put a blower on it ala LS9?
The plot thickens!
Last edited by I Bin Therbefor; Jan 20, 2011 at 05:21 PM. Reason: Missing reference
Team Owner
Joined: Sep 2000
Posts: 24,992
Likes: 2,694
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Someone who is a GM supplier and partially involved in the C7 development program says the new engine will be smaller than the 6.2L, but not a 5.5L. No indication as to whether bigger or smaller than 5.5, but HP is said to be right around the current numbers. So that 440 number could be a preliminary but correct rating.
Melting Slicks
Joined: Jun 2000
Posts: 2,879
Likes: 157
From: Pleasanton CA
I would expect a modest increase in power, but a substantial increase in area under the curve, refinement, and most of all, fuel efficiency.
Team Owner
Joined: Sep 2000
Posts: 24,992
Likes: 2,694
From: Far NW 'burbs of Chicago
St. Jude Donor '13
The big questions are; will they actually take away the 500 lbs or something close, and what will it all cost. A $70,000 stripped base Corvette that's only 150 lbs lighter than today would not be attractive to very many people.
Stay tuned!
Banned Scam/Spammer
Joined: May 2007
Posts: 15,685
Likes: 1,330
From: Machineguns, because I don’t compromise
Someone who is a GM supplier and partially involved in the C7 development program says the new engine will be smaller than the 6.2L, but not a 5.5L. No indication as to whether bigger or smaller than 5.5, but HP is said to be right around the current numbers. So that 440 number could be a preliminary but correct rating.
That would be new...
Le Mans Master
Joined: Sep 2007
Posts: 8,285
Likes: 14
From: Iowa
I just hope GM learned something about there new 5.5 Liter motor when both C6R's blew there motor at last years 24 hour Le Mans race in France ...
The No. 63 Corvette C6.R retired from the 24 Hours of Le Mans shortly after 7 a.m. this morning after completing 225 laps. Antonio Garcia was on his out-lap after replacing Johnny O'Connell in a routine pit stop when he reported a noise entering Mulsanne corner. Telemetry confirmed a problem, and the engine expired before he reached Indianapolis corner.
http://www.corvetteracing.com/histor.../lemans6.shtml
No. 64 Corvette C6.R retired with an apparent engine problem.
http://www.corvetteracing.com/histor.../lemans7.shtml
The No. 63 Corvette C6.R retired from the 24 Hours of Le Mans shortly after 7 a.m. this morning after completing 225 laps. Antonio Garcia was on his out-lap after replacing Johnny O'Connell in a routine pit stop when he reported a noise entering Mulsanne corner. Telemetry confirmed a problem, and the engine expired before he reached Indianapolis corner.
http://www.corvetteracing.com/histor.../lemans6.shtml
No. 64 Corvette C6.R retired with an apparent engine problem.
http://www.corvetteracing.com/histor.../lemans7.shtml
http://www.youtube.com/watch?v=TQqRU...yer_embedded#!
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
Yeah, they learned the NEW engines needed some tweaking and when they did, they won Petit Le Mans. How's that?
http://www.youtube.com/watch?v=TQqRU...yer_embedded#!
http://www.youtube.com/watch?v=TQqRU...yer_embedded#!
10 hour race though... 24hrs is quite a bit more though. Hope they pull it off next year.
Toque
