some pics of GM's 3 Valve heads
Jul 31, 2004 | 08:07 PM
#3
TECH Regular
Joined: Apr 2004
Posts: 470
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From: Norman, OK
That can't be a working model.
I see a couple of serious problems.
The pushrod for the exhaust valve is plain scary and it appears 1 pushrod controls two valves. That's alot of pressure.
I am not sure but it also appears that the rocker assembly IS separated per cylinder, but the valves in each chamber open at the same time (exhaust and Intake)
Is this for real, or just "eye-candy"
More info pleaseeeee......
I see a couple of serious problems.
The pushrod for the exhaust valve is plain scary and it appears 1 pushrod controls two valves. That's alot of pressure.
I am not sure but it also appears that the rocker assembly IS separated per cylinder, but the valves in each chamber open at the same time (exhaust and Intake)
Is this for real, or just "eye-candy"
More info pleaseeeee......
Jul 31, 2004 | 08:44 PM
#4
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
These pictures were in the internal engine section here a long time ago. It was a design test engine and was made as a truck setup. 
Anyway, I think that setup was said to have been tested up to 8000 rpm with no problems.
Here is a thread with some stuff about it. Don't mind the LS2 reference, it is NOT a LS2.
https://ls1tech.com/forums/showthread.php?t=126769
Here is the thread with the pictures in it. The engine is NOT a LS6 like mentioned at one point in this thread.
https://ls1tech.com/forums/showthread.php?t=116049
Anyway, I think that setup was said to have been tested up to 8000 rpm with no problems.
Here is a thread with some stuff about it. Don't mind the LS2 reference, it is NOT a LS2.
https://ls1tech.com/forums/showthread.php?t=126769
Here is the thread with the pictures in it. The engine is NOT a LS6 like mentioned at one point in this thread.
https://ls1tech.com/forums/showthread.php?t=116049
Jul 31, 2004 | 10:41 PM
#5
Originally Posted by retsell
This guy says that both intake and exhaust valves open at the same time. This is not true, look, both exhaust valves are on the same side and the intake is on the opposite, and who cares if one pushrod opens 2 valves as long as the lifters, and pushrods are capable. We change out stock springs for aftermarkets that have over twice the tension, no difference here.
Jul 31, 2004 | 10:44 PM
#6
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From: Deep in the seedy underworld of Koonerville
Originally Posted by Yukonuba
Actually, it appears that the head has two intake valves and a single exhaust valve (located above and in line with the exhaust port).
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Aug 1, 2004 | 01:43 PM
#10
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From: Deep in the seedy underworld of Koonerville
Originally Posted by Round Rock TA
4 cams vs just 1