poltergeist 02

iTrader: (65)

is there any way to tell the difference between sodium filled and regular valves other than weight? i'm looking into buying a set of heads and they are said to have the sodium filled valves and i want to be sure before i drop the cash. thanks

senicalj4579

iTrader: (41)

I just bought some myself. The valves are longer besides being hollow. Thats all I know.

poltergeist 02

iTrader: (65)

back to the top!

midevil1

iTrader: (17)

You will save a couple grams weight per valve. Makes for quicker revs and safer High Rpm's. There may even be a HP increase because of the loss of weight in the valvetrain.

V68Sweep

Wow I've never even heard of this. Very interesting!

Camaroking1996

Would sodium/hollow be make considerable gain comparef to regular valves?

Darkman

iTrader: (2)

https://ls1tech.com/forums/generatio...id-valves.html

vettenuts

iTrader: (4)

Since you are concerned, the only thing you can do is remove the valves and weigh them. I have never seen something physical that sets them apart where you can tell by simply looking at them. If this is a long distance purchase, you may have to work something with the seller with regards to paying 1/2 up front until you receive the heads and verify.

custm2500

iTrader: (11)

I thought sodium filled was mainly for turbo and nitrous applications so they can deal with the heat shock load better. Am I thinking of a different specialty valve?

Obviously any time you can take weight from the rotating assembly it is good but I thought they were mostly for a different purpose.

2nd Gen Fl 'bird

iTrader: (13)

I'm assuming we're talking about the factory Zo6(243) valves. Think road race technology. Hollow valves on the intakes, because they are bigger, makes for a lighter valve. As said earlier, more stable high(and extended) RPM from reduced weight. Sodium filled on exhaust side to dissipate heat from valve because it obviously runs hotter. NA motor on the street? Probably won't matter too much but, I guess every little bit helps. Once you get crazy with Turbo and Nitrous, the better valves helps the longevity of the beating.

vettenuts

iTrader: (4)

The Z06 valves were lighter to allow the higher revving cam in the Z06 without going crazy with valve spring loads. The valves are actually weaker than a solid valve but given the choice I would want the true Z06 valves in the heads. Solid valve 243 heads are a dime a dozen.