Ls9
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 1,195
Likes: 1
From: East Bay CA
Ls9
In case this link gets changed in some way:
"GM has a 3 valve head for the ls9. (due in production 2009 model year).It has bean in development and testing for the last couple of years.It is not central injected. there are several of them in our shop. It is not any thing like the drawing you guys are looking at. I cant tell you mutch about it but think of one shaft mounted rocker moving a short push rod that moves another shaft mounted rocker that opens 2 intake valves at once. The combustion chamber is hart shaped with with the int. valves at the top of the hart I will ask my boss how mutch I can tell you about it."
http://www.ls1tech.com/forums/showpo...9&postcount=61
Here's the whole thread:
http://www.ls1tech.com/forums/showthread.php?t=576537
"GM has a 3 valve head for the ls9. (due in production 2009 model year).It has bean in development and testing for the last couple of years.It is not central injected. there are several of them in our shop. It is not any thing like the drawing you guys are looking at. I cant tell you mutch about it but think of one shaft mounted rocker moving a short push rod that moves another shaft mounted rocker that opens 2 intake valves at once. The combustion chamber is hart shaped with with the int. valves at the top of the hart I will ask my boss how mutch I can tell you about it."
http://www.ls1tech.com/forums/showpo...9&postcount=61
Here's the whole thread:
http://www.ls1tech.com/forums/showthread.php?t=576537
Safety Car
Joined: Jun 2006
Posts: 4,007
Likes: 1,487
From: Ashland, OH
great GM is going to ruin thier motors like Ford started to 15 yrs ago and ruined the Mustang since '96, the major reason I came to the GM side was becuase Ford didnt make a V8 worth a squat. I had a couple of 2v 4.6's and they were ho-hum, had an 01 Lightning (very strong and impressive truck and great light to light vehicle with 440 lb ft of torque) and had an '03 Cobra strong vehicle as well but anything with a blower should be. We'll get the new wiz-bang,head gasket leaking,no lw end torque garbage now. Pretty much everyone i know is in agreement the '05 Mustang is one of the nicest looking Mustangs on the road.....could you imagine the cult following if the car had a 351 (5.8 for you metric fans) vs a 4.6, hell id buy one TODAY if that was the case. I dont know i love my LSx motors and see GM going in the wrong direction maybe just thinking back when those little 5.0's were kicking the snot out of everyone (GM included), remember back in 87-88 where a 9-10k Mustang would show its tailights to GM's finest EVERYTIME then GM upped the ante with the LT-1 more power sure but not near the potential the LS1 came out low end grunt with a high RPM pull, Ford then goes to their Modular crap. Vettes,Camaros,and Firebirds went to the hi-mid 13's Mustangs went to the 15's in 96 WTF????
Burning Brakes
Joined: Jun 1999
Posts: 1,090
Likes: 2
From: Minneapolis Minnesota
Originally Posted by Runge_Kutta
In case this link gets changed in some way:
"GM has a 3 valve head for the ls9. (due in production 2009 model year).It has bean in development and testing for the last couple of years.It is not central injected. there are several of them in our shop. It is not any thing like the drawing you guys are looking at. I cant tell you mutch about it but think of one shaft mounted rocker moving a short push rod that moves another shaft mounted rocker that opens 2 intake valves at once. The combustion chamber is hart shaped with with the int. valves at the top of the hart I will ask my boss how mutch I can tell you about it."
http://www.ls1tech.com/forums/showpo...9&postcount=61
Here's the whole thread:
http://www.ls1tech.com/forums/showthread.php?t=576537
"GM has a 3 valve head for the ls9. (due in production 2009 model year).It has bean in development and testing for the last couple of years.It is not central injected. there are several of them in our shop. It is not any thing like the drawing you guys are looking at. I cant tell you mutch about it but think of one shaft mounted rocker moving a short push rod that moves another shaft mounted rocker that opens 2 intake valves at once. The combustion chamber is hart shaped with with the int. valves at the top of the hart I will ask my boss how mutch I can tell you about it."
http://www.ls1tech.com/forums/showpo...9&postcount=61
Here's the whole thread:
http://www.ls1tech.com/forums/showthread.php?t=576537
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 1,195
Likes: 1
From: East Bay CA
Originally Posted by SteveJ
OK, I don't understand. I thought there was a new engine for 2008. Are there really predictions that there will be a new engine in 2008 and then again in 2009?
Subject to change at any future moment, I see three new engines from
GM that will go into Corvettes: the LS3, LS8, and LS9. I expect the
LS3 to show up in MY2008 C6's. Each of these engines is likely
to be a 6.2L 3V engine.
I have now heard of three distinct valvetrain/head geometries that use a
single cam:
1) The oldest one is
http://www.freepatentsonline.com/6505589.pdf [ Single camshaft design ]
http://www.freepatentsonline.com/6505591.pdf [ Dual camshaft design ]
http://www.freepatentsonline.com/6668546.pdf [ Combustion Chamber shape in Figure 5
- I assume the twin cam and single cam versions have the same CC]
2) The second one is
http://www.freepatentsonline.com/6962134.pdf
3) The third one is described by the person which I have quoted. This
guy seems to be suggesting that the first design has been reversed,
in some sense. Now, it would seem, the pushrods run from the camshaft
to the rocker arm shaft closer to the exhaust side of the head. The little
rocker arms shown in 6505591.pdf then push from the exhaust side to
the intake side and actuate two intake valves simultaneously. At least,
that's the way I read his comments.
Change of subject: Does the aluminum frame go across the board in MY2008??
If anyone else with good information feels like speaking up, please do!
Team Owner
Joined: Jun 2001
Posts: 100,672
Likes: 2
From: Cleveland OH
I guess this year's Detriot Autoshow or the 07 Birthday Bash are going to have a TON of new info in any case ...
With the LS2 factory closing (I think) ... I think that the LS3 is inevitable...
With the LS2 factory closing (I think) ... I think that the LS3 is inevitable...
Thread Starter
Burning Brakes
Joined: Feb 2000
Posts: 1,195
Likes: 1
From: East Bay CA
Anybody seen this one??
http://img297.imageshack.us/img297/4337/3vheadsuw8.jpg
Notice that the secondary rocker for the exhaust is now braced.
http://img297.imageshack.us/img297/4337/3vheadsuw8.jpg
Notice that the secondary rocker for the exhaust is now braced.
Team Owner
Joined: Oct 2001
Posts: 56,381
Likes: 79
great GM is going to ruin thier motors like Ford started to 15 yrs ago and ruined the Mustang since '96, the major reason I came to the GM side was becuase Ford didnt make a V8 worth a squat. I had a couple of 2v 4.6's and they were ho-hum, had an 01 Lightning (very strong and impressive truck and great light to light vehicle with 440 lb ft of torque) and had an '03 Cobra strong vehicle as well but anything with a blower should be. We'll get the new wiz-bang,head gasket leaking,no lw end torque garbage now. Pretty much everyone i know is in agreement the '05 Mustang is one of the nicest looking Mustangs on the road.....could you imagine the cult following if the car had a 351 (5.8 for you metric fans) vs a 4.6, hell id buy one TODAY if that was the case. I dont know i love my LSx motors and see GM going in the wrong direction maybe just thinking back when those little 5.0's were kicking the snot out of everyone (GM included), remember back in 87-88 where a 9-10k Mustang would show its tailights to GM's finest EVERYTIME then GM upped the ante with the LT-1 more power sure but not near the potential the LS1 came out low end grunt with a high RPM pull, Ford then goes to their Modular crap. Vettes,Camaros,and Firebirds went to the hi-mid 13's Mustangs went to the 15's in 96 WTF????
Team Owner
Joined: Oct 2001
Posts: 56,381
Likes: 79
Subject to change at any future moment, I see three new engines from
GM that will go into Corvettes: the LS3, LS8, and LS9. I expect the
LS3 to show up in MY2008 C6's. Each of these engines is likely
to be a 6.2L 3V engine.
I have now heard of three distinct valvetrain/head geometries that use a
single cam:
1) The oldest one is
http://www.freepatentsonline.com/6505589.pdf [ Single camshaft design ]
http://www.freepatentsonline.com/6505591.pdf [ Dual camshaft design ]
http://www.freepatentsonline.com/6668546.pdf [ Combustion Chamber shape in Figure 5
- I assume the twin cam and single cam versions have the same CC]
2) The second one is
http://www.freepatentsonline.com/6962134.pdf
3) The third one is described by the person which I have quoted. This
guy seems to be suggesting that the first design has been reversed,
in some sense. Now, it would seem, the pushrods run from the camshaft
to the rocker arm shaft closer to the exhaust side of the head. The little
rocker arms shown in 6505591.pdf then push from the exhaust side to
the intake side and actuate two intake valves simultaneously. At least,
that's the way I read his comments.
Change of subject: Does the aluminum frame go across the board in MY2008??
If anyone else with good information feels like speaking up, please do!
GM that will go into Corvettes: the LS3, LS8, and LS9. I expect the
LS3 to show up in MY2008 C6's. Each of these engines is likely
to be a 6.2L 3V engine.
I have now heard of three distinct valvetrain/head geometries that use a
single cam:
1) The oldest one is
http://www.freepatentsonline.com/6505589.pdf [ Single camshaft design ]
http://www.freepatentsonline.com/6505591.pdf [ Dual camshaft design ]
http://www.freepatentsonline.com/6668546.pdf [ Combustion Chamber shape in Figure 5
- I assume the twin cam and single cam versions have the same CC]
2) The second one is
http://www.freepatentsonline.com/6962134.pdf
3) The third one is described by the person which I have quoted. This
guy seems to be suggesting that the first design has been reversed,
in some sense. Now, it would seem, the pushrods run from the camshaft
to the rocker arm shaft closer to the exhaust side of the head. The little
rocker arms shown in 6505591.pdf then push from the exhaust side to
the intake side and actuate two intake valves simultaneously. At least,
that's the way I read his comments.
Change of subject: Does the aluminum frame go across the board in MY2008??
If anyone else with good information feels like speaking up, please do!
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Instructor
Joined: Aug 2006
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Outdated design
Don't believe it? Europeans are getting over 600hp out of 6 liter street engines with out superchargers. Pushrods were a joke 40 years ago, think how fast the Z-06 would be with the engine the Ferrari 599 has in it. GM could build this engine for little more than the LS7 costs.
Le Mans Master
Joined: Feb 2000
Posts: 8,099
Likes: 398
From: Oakland, CA
.Jinx
Team Owner
Joined: Jun 2001
Posts: 100,672
Likes: 2
From: Cleveland OH
Team Owner
Joined: Oct 2001
Posts: 56,381
Likes: 79
Don't believe it? Europeans are getting over 600hp out of 6 liter street engines with out superchargers. Pushrods were a joke 40 years ago, think how fast the Z-06 would be with the engine the Ferrari 599 has in it. GM could build this engine for little more than the LS7 costs.
Answer this: Why do you care about valve placement and actuation if the engine makes the HP you want? The LSx series of engines are small, light, high HP, and get great gas mileage for their HP. When you compare them to their Euro piers that are complicated, heavy, have more weight at the top, and get worse mileage; who cares if they even do make a few more HP.
Last edited by User 81424; Dec 12, 2006 at 09:44 PM.