LS7- 7.0L or 6.4?
09-04-2004, 01:18 PM
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LS7- 7.0L or 6.4? Let's discuss this. Most people seem to think it'll be a 6.4L. Many of us even saw the PDF from the GM master RPO list that confirmed this a while back. On the other hand, many people think GM couldn't hit thier "target" of 500HP in an emissions-friendly package with 6.4L, and decided to up the displacement to 7.0L.
What do you think?
Please explain why you think it will be either 7L or 6.4L in as much detail as possible, and if you've received information confirming it's one or the other, please relate specifically where that information came from (to the max extent possible).
Personally, I believe it will be 6.4L. My reasons for believing this:
1. Copied and pasted from the GM Master RPO list: LS7 14938 P ENG M ENGINE GAS, 8 CYL, 6.4L, SFI, ALUM, HO, GM 718 E X E A
2. GTO concept, shown in this thread has been confirmed to at least be using the LS7 intake and heads.
3. Although a few "GM insiders" may have claimed that the next Z06 is getting a 427, many more on this forum and others have said it will be 6.4L and flat out denied it will be a 7.0L.
So what will it be? 6.4 or 7.0?
What do you think?
Please explain why you think it will be either 7L or 6.4L in as much detail as possible, and if you've received information confirming it's one or the other, please relate specifically where that information came from (to the max extent possible).
Personally, I believe it will be 6.4L. My reasons for believing this:
1. Copied and pasted from the GM Master RPO list: LS7 14938 P ENG M ENGINE GAS, 8 CYL, 6.4L, SFI, ALUM, HO, GM 718 E X E A
2. GTO concept, shown in this thread has been confirmed to at least be using the LS7 intake and heads.
3. Although a few "GM insiders" may have claimed that the next Z06 is getting a 427, many more on this forum and others have said it will be 6.4L and flat out denied it will be a 7.0L.
So what will it be? 6.4 or 7.0?
sorry i have no reasons at this time 
09-04-2004, 04:06 PM
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yeah Ive heard some interesting rumblings in relation to 7.0, I hope it is correct, if the goal is 500 hp will they get the extra 100 out of 3valve heads and and increase in displacement of .4 l+
or maybe there is a link to both with a 4.150 bore and a 3.622 crank
from wards auto
From wardsauto not sure if it has been posted talk about 6 speed auto and 7L LS7
08-27-04
Corvette to Get Sequential 6-Speed Automatic
New “Tiptronic”-type automatic should be available on the ’06 Corvette.
Help is on the way for the new Corvette – specifically its carryover 4-speed automatic transmission.
Better automatic on way for new ’Vette.
The car’s current automatic, which lacks “Tiptronic”-like manual-shift capability, is one of the few real disappointments in the otherwise impressive new Corvette.
But not for long. General Motors Corp. Vice Chairman and chief product guru Bob Lutz admits a sequential 6-speeder is on the way, though he declines to specify timing.
“We don’t talk about future product,” says Lutz, who mostly talks only about future product.
GM’s all-new 6-speed automatic will be a derivative of the Hydramatic 5L50-E sequential-shift 5-speed that is standard in the Cadillac XLR roadster. It will be built in four sizes accommodating up to 520 lb.-ft. (705 Nm) of torque and 450 hp. It brings a 7% performance improvement over the new car’s current 4L60/65 automatic, while hiking fuel economy 4%.
The new 6-speed automatic is expected in late 2005, for the ’06 model year. That is about when the Corvette joins the supercar ranks with the launch of a 500-hp, 7L Z06 version of the new model, which is scheduled to debut at the 2005 Detroit auto show. A new LS7 V-8 replaces the old 5.7L 405-hp LS6 as the highest-performance Corvette engine. Top speed jumps from the standard ’Vette’s 186 mph (299 km/h) to more than 200 mph (322 km/h).
some other interesting comments from David Hill
http://www.corvetteactioncenter.com/...05/final5.html
"...
We are doing some spreading because we've improved the coupe's affordability. The 2005, entry-level coupe is more car for less money. Also, the Z51 option on coupe and convertible offers almost-Z06 ride-and-handling dynamics for a very affordable price. We are spreading the coupe and convertible farther than they were spread before.
When we get to the Z06, it's going to have more performance and more appearance differentiation from the other cars. It's going to be more expensive, admittedly, but it's going to be a terrific value in comparison to anything else you can buy, including Porsche Turbo, Viper and the Ford GT.
We are including a lot of C5-R technical findings into the Z06. When people get a chance to see this car at the North American International Auto Show (at Detroit) in January, I think they're going to be really surprised at how much we've been able to do with the Z06. By the time 2006 comes, when you look all the way from a entry-coupe to a Z06, we are definitely offering a broader range of cars, but they'll all be very Corvette-like.."
or maybe there is a link to both with a 4.150 bore and a 3.622 crank
from wards auto
From wardsauto not sure if it has been posted talk about 6 speed auto and 7L LS7
08-27-04
Corvette to Get Sequential 6-Speed Automatic
New “Tiptronic”-type automatic should be available on the ’06 Corvette.
Help is on the way for the new Corvette – specifically its carryover 4-speed automatic transmission.
Better automatic on way for new ’Vette.
The car’s current automatic, which lacks “Tiptronic”-like manual-shift capability, is one of the few real disappointments in the otherwise impressive new Corvette.
But not for long. General Motors Corp. Vice Chairman and chief product guru Bob Lutz admits a sequential 6-speeder is on the way, though he declines to specify timing.
“We don’t talk about future product,” says Lutz, who mostly talks only about future product.
GM’s all-new 6-speed automatic will be a derivative of the Hydramatic 5L50-E sequential-shift 5-speed that is standard in the Cadillac XLR roadster. It will be built in four sizes accommodating up to 520 lb.-ft. (705 Nm) of torque and 450 hp. It brings a 7% performance improvement over the new car’s current 4L60/65 automatic, while hiking fuel economy 4%.
The new 6-speed automatic is expected in late 2005, for the ’06 model year. That is about when the Corvette joins the supercar ranks with the launch of a 500-hp, 7L Z06 version of the new model, which is scheduled to debut at the 2005 Detroit auto show. A new LS7 V-8 replaces the old 5.7L 405-hp LS6 as the highest-performance Corvette engine. Top speed jumps from the standard ’Vette’s 186 mph (299 km/h) to more than 200 mph (322 km/h).
some other interesting comments from David Hill
http://www.corvetteactioncenter.com/...05/final5.html
"...
We are doing some spreading because we've improved the coupe's affordability. The 2005, entry-level coupe is more car for less money. Also, the Z51 option on coupe and convertible offers almost-Z06 ride-and-handling dynamics for a very affordable price. We are spreading the coupe and convertible farther than they were spread before.
When we get to the Z06, it's going to have more performance and more appearance differentiation from the other cars. It's going to be more expensive, admittedly, but it's going to be a terrific value in comparison to anything else you can buy, including Porsche Turbo, Viper and the Ford GT.
We are including a lot of C5-R technical findings into the Z06. When people get a chance to see this car at the North American International Auto Show (at Detroit) in January, I think they're going to be really surprised at how much we've been able to do with the Z06. By the time 2006 comes, when you look all the way from a entry-coupe to a Z06, we are definitely offering a broader range of cars, but they'll all be very Corvette-like.."
Last edited by strife; 09-04-2004 at 04:37 PM.
09-05-2004, 12:47 PM
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It does seem like the rumblings about a 7L Corvette are building.
Much of the following are reposts from other forums. Reposts appear in quotes; my comments are between the quote boxes.
Edit: I just noticed that strife posted the same Wardsauto article that I found on the Z06 forum.
While Bob Lutz himself isn't quoted as saying the LS7 is 7L, Wardsauto is considered a very reputible and reliable source.
Like most rumors, this is secondhand information, which is not to say it's not true, just less reliable than firsthand sources.
What I found interesting about this post is that 7.0L is again confirmed, and the fact that Dave Hill seems to imply that they are sticking to a 16 valve (2 valve/cylinder) head design. Perhaps they decided against the 3 valve setup?
That actually jives with the following quote from another thread on this forum.
Since the current heads and the C5R heads are both 2 valve heads, the implication is pretty clear that the LS7 heads are in fact a 2 valve/cylinder design, versus a 3 valve design as all previous speculation has suggested.
If GM decided on a 7L setup, IMO this would have eliminated the need for a fancy and complex 3 valve head, since 500HP shouldn't be too tough to achieve with 7L of displacement.
One more, from Z06Vette.com:
There's more and more of this kind of stuff popping up almost daily, and it's getting to the point that even I am starting to believe. I guess if you're gonna be wrong, it's better to underestimate and be pleasantly surprised than to overestimate and be disappointed.
Much of the following are reposts from other forums. Reposts appear in quotes; my comments are between the quote boxes.
Edit: I just noticed that strife posted the same Wardsauto article that I found on the Z06 forum.
From Wardsauto.com(posted at Z06Vette.com)
The new 6-speed automatic is expected in late 2005, for the ’06 model year. That is about when the Corvette joins the supercar ranks with the launch of a 500-hp, 7L Z06 version of the new model, which is scheduled to debut at the 2005 Detroit auto show. A new LS7 V-8 replaces the old 5.7L 405-hp LS6 as the highest-performance Corvette engine. Top speed jumps from the standard ’Vette’s 186 mph (299 km/h) to more than 200 mph (322 km/h)......'A German competitor (BMW AG) has just launched a complicated V-10', Lutz says, 'Our overhead-valve V-8 has the same power and performance, and only revs to 6,500 rpm.'
The new 6-speed automatic is expected in late 2005, for the ’06 model year. That is about when the Corvette joins the supercar ranks with the launch of a 500-hp, 7L Z06 version of the new model, which is scheduled to debut at the 2005 Detroit auto show. A new LS7 V-8 replaces the old 5.7L 405-hp LS6 as the highest-performance Corvette engine. Top speed jumps from the standard ’Vette’s 186 mph (299 km/h) to more than 200 mph (322 km/h)......'A German competitor (BMW AG) has just launched a complicated V-10', Lutz says, 'Our overhead-valve V-8 has the same power and performance, and only revs to 6,500 rpm.'
Originally posted by 427l (at Z06Vette.com)
C6 ZO6 News from Carlisle
--------------------------------------------------------------------------------
I talked with several engineers from the GM corvette team and here's what I found out:
The car will be unvailed in January and put on sale in august. The engine will be a 7.0L but they would not say what the horsepower would be. I did talk with Dave Hill briefly and although he was very careful about his remarks to my questions I asked him about any potential 3 valve per cylinder head for the corvette. He said that although GM had researched and testing many different engine packages they did not see anything wrong with their current setup of a 16 valve pushrod V8. I was also told (by another engineer) that the exterior of the z06 would be significantly different than the current C6. The engineer continued to say that althought the current c5 coupe could easily be made to look like a c5 z06, the new c6 coupe will not be able to be transformed into the z06 very easily, he said it would look much different. I was also told the new engine will be an LS7. Just thought you all might like to know.
C6 ZO6 News from Carlisle
--------------------------------------------------------------------------------
I talked with several engineers from the GM corvette team and here's what I found out:
The car will be unvailed in January and put on sale in august. The engine will be a 7.0L but they would not say what the horsepower would be. I did talk with Dave Hill briefly and although he was very careful about his remarks to my questions I asked him about any potential 3 valve per cylinder head for the corvette. He said that although GM had researched and testing many different engine packages they did not see anything wrong with their current setup of a 16 valve pushrod V8. I was also told (by another engineer) that the exterior of the z06 would be significantly different than the current C6. The engineer continued to say that althought the current c5 coupe could easily be made to look like a c5 z06, the new c6 coupe will not be able to be transformed into the z06 very easily, he said it would look much different. I was also told the new engine will be an LS7. Just thought you all might like to know.
What I found interesting about this post is that 7.0L is again confirmed, and the fact that Dave Hill seems to imply that they are sticking to a 16 valve (2 valve/cylinder) head design. Perhaps they decided against the 3 valve setup?
That actually jives with the following quote from another thread on this forum.
Originally posted by Chris@AP-Engineering
That intake is a LS7, for the big cubic inch corvette that will be coming out in a few years. Nice manifold and makes good power. When I worked at Katech we were doing the initial tests on that manifold. If you think the manifold is nice wait till you guy's see the heads it bolts on to. They are going to be a cross between the current heads and the C5R heads. I have flowed a few sets and they have all flowed right around 370cfm. Can't wait till they come out!!
That intake is a LS7, for the big cubic inch corvette that will be coming out in a few years. Nice manifold and makes good power. When I worked at Katech we were doing the initial tests on that manifold. If you think the manifold is nice wait till you guy's see the heads it bolts on to. They are going to be a cross between the current heads and the C5R heads. I have flowed a few sets and they have all flowed right around 370cfm. Can't wait till they come out!!
If GM decided on a 7L setup, IMO this would have eliminated the need for a fancy and complex 3 valve head, since 500HP shouldn't be too tough to achieve with 7L of displacement.
One more, from Z06Vette.com:
Originally posted by Zlicious
I guess some news were spilled out from GM on the corvetteforum by a GM employer and was deleted by mods asap.
"Guys the forum took it off so no one gets in trouble. I respect that 100%. The story was wrote by automotive news there web site is www.autonews.com If you know somone signed up you r set. Otherwise there is a fee. If you sign up go to ...GM unfinished business lutz ............ect. story. This is the same thing that I posted before. Trust me it is 7.0 500.hp And I know better than to post somethig that would get me fired!!!!!!"
Here is what the Automotive news article said:
"The re-engineered and re-styled 2005 Corvette packs a 400-hp V-8.
Corvette: The restyled and re-engineered 2005 Corvette is being launched this summer; a convertible arrives this fall. A 6.0-liter V-8 engine producing 400 hp is standard. The Z06 model with a 7.0-liter, 500-hp V-8 and a fastback roofline is on tap for the 2006 model year."
I guess some news were spilled out from GM on the corvetteforum by a GM employer and was deleted by mods asap.
"Guys the forum took it off so no one gets in trouble. I respect that 100%. The story was wrote by automotive news there web site is www.autonews.com If you know somone signed up you r set. Otherwise there is a fee. If you sign up go to ...GM unfinished business lutz ............ect. story. This is the same thing that I posted before. Trust me it is 7.0 500.hp And I know better than to post somethig that would get me fired!!!!!!"
Here is what the Automotive news article said:
"The re-engineered and re-styled 2005 Corvette packs a 400-hp V-8.
Corvette: The restyled and re-engineered 2005 Corvette is being launched this summer; a convertible arrives this fall. A 6.0-liter V-8 engine producing 400 hp is standard. The Z06 model with a 7.0-liter, 500-hp V-8 and a fastback roofline is on tap for the 2006 model year."
09-10-2004, 12:42 PM
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they don't need to develop an engine if there using the 427, a reliable 600hp one is already out ala the ZL1 Camaro Stage III. I would guess a 6.4l just based on the fact that a 500 hp 427 isn't all that impressive.
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09-11-2004, 06:01 PM
#9
6.4L -I'm so sure that I would put money on it.
Among other things, they were/are having some troubles reaching that 500hp goal. There would be no way they would have that problem with a 7.0L.
Also, the LS2 is already at 6.0L, they wouldn't need another liter to gain only 100hp.
Look for the 7.0L in the "super corvette" (some call it blue devil),
I have a hard time believing GM wouldn't leave ANY room for improvement (which is what they would be doing if they dropped a 427 in the C6 Z06 corvette).
Among other things, they were/are having some troubles reaching that 500hp goal. There would be no way they would have that problem with a 7.0L.
Also, the LS2 is already at 6.0L, they wouldn't need another liter to gain only 100hp.
Look for the 7.0L in the "super corvette" (some call it blue devil),
I have a hard time believing GM wouldn't leave ANY room for improvement (which is what they would be doing if they dropped a 427 in the C6 Z06 corvette).
09-11-2004, 07:52 PM
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they need to make a C6 (6.0), Z06(6.4), and a ZL1 (7.0) vette. . . priced at 40,000, 53,000, and 6,000, so i can afford the ZL1 
and hell, why not a ZL2 with an aluminum 572, or atleast a supercharged 8.1
and hell, why not a ZL2 with an aluminum 572, or atleast a supercharged 8.1
09-12-2004, 10:13 PM
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nope not that aggressive
it lookse more streetable...if i find a pic ill post it
if anyone went to woodward Dream crusie they prolly saw them on the side of the street
said GTR right on the car with the C6 body style...and the headlights had a lil bit of a difference
it lookse more streetable...if i find a pic ill post it
if anyone went to woodward Dream crusie they prolly saw them on the side of the street
said GTR right on the car with the C6 body style...and the headlights had a lil bit of a difference
09-15-2004, 09:15 AM
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Originally Posted by Phoenix57
500 hp 7l would be a loss of power in the 7l, compared to the 600 hp phase III.
09-15-2004, 10:42 AM
#18
Well, ford just upped the power rating for production of the GT to 550hp. Motor Trend ran an 11.3x @ over 130mph in the latest issue. If GM DOESNT put a 500+hp Engine in the new Z06, reguardless of displacement, its gonna be so far behind the curve that i may have to jump ship over to the Viper
09-15-2004, 10:46 AM
#19
Wasn't a 402 4" bore/4" stroke truck motor rumored to be in R&D? If so I wouldn't be at all surprised to see a 402" Z06. Production cost would be much lower and 500hp not hard to achieve especially if the rumored big port LS7 heads and intake are added.
09-15-2004, 10:35 PM
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since when was the vette going to be in competetion to a true world class supercar that is capable of over 205 safetly? It will have to waste vipers though.