F0x Slaughter

I believe the stock valves are 1.800" intake and 1.500" exhaust. I need to do a valve job on my heads and don't have the money to do what I want with the head work so I was going to slap new valves in, 1.6 rockers, new push rods, and lifters.

My question is, I think I read you can run 2.000" intake and 1.600" exhaust valves without doing valve seat work. Is this true?

WS Sick

The Stock LT1 valves are 1.94 intake/1.50 exhaust, If you go bigger valves the valve will not set in the seat as deep as stock. A problem with larger valves in a stock chamber is valve shrouding is increased, if you unshroud the valves then mill back to stock chamber size you will gain a small amount.

F0x Slaughter

So stock valves till I send the heads out to be worked over?

Also am looking at putting in a CC503.

Ocala93TA

iTrader: (9)

running stock heads with my 503 and its awsome so i would worry about that to much at first if its not in the budget

96lt1m6

iTrader: (31)

You can do 2.00 1.56 and be fine, new springs,step up to 7/16 studs and of course some Lloyd Elliot or AI in your life and make those heads shine!!!!!

RamAir95TA

iTrader: (2)

Larger valves on stock heads at your power level aren't worth a thing. Stick to stock for the time being until you decide to do ported heads, then let the head porter decide what size to put in. Keep in mind there are cars making big numbers on stock-sized valves.

Big Al

iTrader: (1)

I have Manley 2.0 and 1.6's in mine. Big mistake, the seats are too small for the valves. It was like that when I bought it. My engine builder had a hell of a time getting them to seal.

Al 95 Z28

F0x Slaughter

I plan on sending my heads out to AI to do the 200cc job on them. I saw the Manley valves that's why I asked. Yes I was gonna put in 7/16 ARP studs. Now the question is, what's the difference between self align rockers and non, besides the obvious. Like what does the whole align thing mean?

96LT1355Z28

iTrader: (2)

Self-aligning rockers have guides at the tip that will keep the roller centered on the valve tip. They don't use guideplates since they hold themselves on the tip.

NSA's have just the roller on the tip and will use guideplates bolted to the rocker studs which hold the pushrods in the rocker.

NSA's cost less but will require hardened pushrods and and the correct guideplates for proper alignment. SA's will bolt on and center themselves but can become unstable at higher rpm's. AI can help you with what rocker will best suite your needs.

Mystery Bird

iTrader: (7)

Putting in 2.0 and 1.55 valves fit in the stock seat but they still need to be machined. They are the largest to fit without replacing the seats.

F0x Slaughter

Well I plan on running chromoly push rods so I should just get NSA's and new guide plates?

96LT1355Z28

iTrader: (2)

My best advise is to ask AI since they're doin your heads. They will be able to tell you based off your cam specs and rpm range which is best for you. NSA's and guideplates I'd say will be just fine especially since your already replacing the pushrods. AI can probably get what ever rocker you want with any needed accessories for the same $ or less than mail order parts houses. Plus they can ship them with your heads so your not paying separate shipping from two places.

F0x Slaughter

I don't have the money to do the heads. I have a burnt valve so that's where all this comes in. I already have an invoice from AI for everything but it's to much. So I was gonna do this then when I get the money sell the stuff.

defaultexistence

iTrader: (11)

Try elliotsportworks.com if AI is to much$$ for you.

F0x Slaughter

I've look at Elliot before. The reason why AI is to much is because I would do a whole head and valve train which is about 5000. I can do and upgraded valve train and cam for like 1200 plus gaskets and do my heads later.

defaultexistence

iTrader: (11)

1200 with Lloyd would do head porting,valves,springs,assembly & cam ... How it's that not a better deal? .....

WS Sick

If you do all 16 valves youre looking at close to 250 for the valves, close to 200 to have the guides done, and another 200 for the valvejob, add hot tanking for 20$ 60$ for studs, and 250$ for springs retainers and guideplated and your buying a set of LE or AI heads with a few hundred $s more.

96capricemgr

iTrader: (1)

Would a few used stock valves help you?

I am sure a handful of us have some laying around for nothing more than shipping.

F0x Slaughter

LE heads do not include lifters or guide plates or push rods, only springs and head work. No rockers.

F0x Slaughter

I can get 16 valves for 170 bucks.