Nemesis9

iTrader: (3)

I just purchase bare CNC ported 853 castings for my 347 forged short block. I have Comp 918 springs, Ti retainers, and an F10 112 LSA cam. I need to purchase valves, but have no idea what size or company to purchase from.

It's been recommended to me to use stock LS6 sodium filled valves, I haven't been able to locate any used. The other brand I've been looking at are Ferra.

Any suggestions or recommendations? Anyone have LS6 vavles for sale?

chino_man279

iTrader: (7)

I believe Lingenfelter has a stock of used LS6 valves...or they used to. Give them a call.

Gunnar@Patriot

iTrader: (20)

If you decide to with Ferrea, let us know. We can give you an excellent price on a set.

Spinmonster

Stay away from 2 piece vavles like the LS6'ers. They are the reason I bought my first forged motor when one broke in 2. Stay with a good one piece steel valve that is undercut.

chino_man279

iTrader: (7)

If you are running the lighter valves, it takes less spring pressure to control it...keeping the two halves the way they were intended to stay, in one piece. This of course assumes you are not going to spin crazy rpm's. There is alot to be said about upper rpm valve control. A heavier/larger valve combined with a heavier spring and retainer do not always make more power. The lighter valve with the light behive spring could possibly have much better control than the heavier single piece valves. Bouncing valves could not only damage a two piece valve, but beat up a heavier one piecer as well. Not to mention valve jobs. I say with the F10 go with the lighter valve, behive springs, titanium retainers, and rebuilt rockers.

PREDATOR-Z

Kateck has new sodium filled also try SDPC.

Spinmonster

Proper spring pressure and a steel valve is all that is needed to get to 7k rpms and if you run lightweight valves what is the point if not to rev it to that same level. If the GM hollow stems were so great, then where are the after market ported heads running them with the same results as cartek, LG, Lingenfelter? Lightweight valves are only needed in high rev applications where GM's crap gave out on me.

67Firebird455

iTrader: (27)

Personally, I went with 2.02 ferrea 6000 intake valves, and manley 1.575" exhausts. Not sure how they work, but they aren't 2-piece either. I won't need over 7,000 rpm to run the number I want to run.