LS-6 valves verses Oversized valves
11-18-2009, 10:18 AM
#21
Staging Lane
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On a side note I have a question about the valves. The LS6 valves are all sodium filled or always hollow intake and sodium exhaust? Been searching forever and cant find a straight answer. Thanks.
11-18-2009, 11:13 AM
#22
Launching!
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Interesting thread, does not seem like such a small change, esp. on the intake side would really be worth the valve train weight the larger, solid valves would add.
Subscribing.
12-07-2009, 06:15 PM
#25
You can get larger than stock hollow valves. I was going to use hollow 2.04 and LS6 1.55 sodium filled valves in my last set of heads, but I ended up selling them. I think with your stock bore I would go with the LS6 valves combined with good headwork. A nice valve job, radius throat cut, and blend will pick up a lot of flow combined with the larger than the 5.3's stock valves.
12-08-2009, 05:02 PM
#26
You can get larger than stock hollow valves. I was going to use hollow 2.04 and LS6 1.55 sodium filled valves in my last set of heads, but I ended up selling them. I think with your stock bore I would go with the LS6 valves combined with good headwork. A nice valve job, radius throat cut, and blend will pick up a lot of flow combined with the larger than the 5.3's stock valves.
12-08-2009, 07:43 PM
#27
About valve shrouding, on big block chevrolets, sometimes the block itself is notched a little to help unshroud the intake valve. Has this been tried on any of the LS motors? I assume so or either it is not an issue. Just curious.
12-10-2009, 10:41 PM
#31
01-10-2010, 12:40 PM
#36
Teching In
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Since it was briefly touched on, and partially answered, I figured I would contribute.
As mentioned, the reason for hollow intake valve stems is reduced mass.
The reason the LS6 exhaust valves are sodium filled is for reduced temperature (and thus ultimately durability).
Since intake valves inherently run much cooler than exhaust valves, there is no technical reason to sodium fill them. It would just be a wast of money.
As mentioned, the reason for hollow intake valve stems is reduced mass.
The reason the LS6 exhaust valves are sodium filled is for reduced temperature (and thus ultimately durability).
Since intake valves inherently run much cooler than exhaust valves, there is no technical reason to sodium fill them. It would just be a wast of money.
01-13-2010, 05:57 PM
#37
Since it was briefly touched on, and partially answered, I figured I would contribute.
As mentioned, the reason for hollow intake valve stems is reduced mass.
The reason the LS6 exhaust valves are sodium filled is for reduced temperature (and thus ultimately durability).
Since intake valves inherently run much cooler than exhaust valves, there is no technical reason to sodium fill them. It would just be a wast of money.
As mentioned, the reason for hollow intake valve stems is reduced mass.
The reason the LS6 exhaust valves are sodium filled is for reduced temperature (and thus ultimately durability).
Since intake valves inherently run much cooler than exhaust valves, there is no technical reason to sodium fill them. It would just be a wast of money.
02-02-2010, 06:55 PM
#40
FormerVendor
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Back-cut and valve job with the stock hollow stems. You won't be sorry. Been there, done that. The larger valves are useless on the stock bore. If you were building a 4.0" bore engine, the larger valve starts to shine a bit but I might still be temped to run the lighter valve. I have an LSK lobed cam in my DD CTS-V, it pulls like a SOB out past 7K... Of course, it does have a very simple but properly executed valvetrain setup...
Shane
Shane