team39763

iTrader: (3)

I'm looking to get some lightweight valves for a set of heads, but I don't know which one's to look at. I think I read somewhere that the ferrea hollow valves are pretty heavy. The LS6 hollow valves are pretty light, but only come in stock sizes. I don't know much about REV stainless valves.
I just need a set that's able to be reved to high rpms without any problems. I'd like to get the lightest valves I can afford and 2.08" or smaller. I'd appreciate any advice or suggestions. Thanks.

DONAIMIAN

iTrader: (18)

What heads are you running? Along with what springs, and what RPM do you plan on turning.

UGotBeaT

the 2.055 ferrea hollow stem was 97 grams i think? Pretty light for being a stainless valve..

Post up your setup..

DONAIMIAN

iTrader: (18)

FWIW the valves in my 5.3's come in at 98 and 89 grams. Both are stainless ferrea I believe.

team39763

iTrader: (3)

I'm planning on using cnc'd 243's, and I'll be spinning up to 7500(maybe a little more or a little less). I'd like to use a beehive spring like the Pac 1518. I'll make sure the cam designer knows what I plan to work with. Right at this moment I'm learning very hard towards some GM hollow intake valves with sodium filled exhaust valves.

PREDATOR-Z

Manley Hollow stem 11362H-8, 2.02 intake 93gr
Manley Hollow stem 11361-8, 1.550 exhaust 87gr

Bigger and you'll need to change seats



http://www.manleyperformance.com/dl/2009/valves.pdf

SweetS10V8

iTrader: (4)

Personally, I would just get a set of LS6 valves. They are about 73g

team39763

iTrader: (3)

Yeah, I think the LS6 valves are gonna be my choice. I checked out the manley valves and if the guys porting the heads think I need bigger valves then I'll go with the manley's. Can anybody see any reason NOT to go with the LS6 valves?

squalor

iTrader: (3)

... another dead thread revival from the n00bie pest ...


Because you can't get them ?
Out of production in 2014. People have WTB threads looking to complete their partial set that they have been sitting on for awhile. 243 heads with LS6 valves fetch a $200 premium, or more and people have been burned.
I have heard some people buy LS3 intake valves and have them cut down to fit cathedral heads and when cut down, they weigh 83 grams. Is this weight correct for a 2.02" ?

Now for my real question. What to do about exhaust ? Could a LS9 sodium filled hollow exhaust valve (GM PART # 12605525) be cut down from 1.590" to 1.57 ? Does anyone know how much it weighs ? I cant find this spec. I've read it is the same length but the lock groove is a bit lower, that it needs it's matching keeper for correct installed height. Does anyone know how much lower the groove is ? Would this mess with rocker geometry ? Does anyone know the weight of the Comp 1772-16 Light Weight Tool Steel Beehive Retainer ? How much does a typical machine shop charge to cut down and re-shape valves ?
Thanx in advance for any and all replies.

JakeFusion

iTrader: (7)

83g is correct for a 2.04" valve with turned down LS3s.

redbird555

iTrader: (14)

to me this all sounds like a lot of work hunting down parts and epensive machining.... not to mention just buying all those valves to begin with would be well over the $200 preium of getting ls6 243's. If you go on corvette forum a lot of people sell their z06 heads or the valves separate. Theres always a chance you might get burned with anything. However if you can find a reputable seller there or on here then to me its worth it to buy the ls6 heads strip the valves and then sell the castings with stock valves or just bare.

I went this route, bought my 243's for 350 then found a set of ls6 valves on corvetteforum for 100 bucks. There people dont charge that much more of a premium for stock ls6 stuff because by and large to them its still just an "oem" part and not desirable. Just look for any z06 or 2004-2005 ctsv heads