material for exhaust valves
#1
material for exhaust valves
Well, I decided I'm gonna run water injection on my close to stock LS motor build, I would call it budget but if you were paying for all teh stuff i'm doing you'd be broke. having your bestfriend own a machine shop is a great thing
well as many may know the higher temperatures on the exhaust valve wen running water injection could be an issue with stock valves so I wanna look into making a set of billet steel or billet stainless exhaust valves.
the valves but will be machined out of rod stock, but what should they be made out of? stainless or regular steel? I'm leaning towards stainless because of teh amount of steam flowing over the valve
what are stock valves made of anyways?
well as many may know the higher temperatures on the exhaust valve wen running water injection could be an issue with stock valves so I wanna look into making a set of billet steel or billet stainless exhaust valves.
the valves but will be machined out of rod stock, but what should they be made out of? stainless or regular steel? I'm leaning towards stainless because of teh amount of steam flowing over the valve
what are stock valves made of anyways?
#2
Re: material for exhaust valves
Ok this is like that 5th thread you made with stupid machining questions. Just becuase your best friend owns a couple of machines doesn't mean anything you need you can machine and its going to be cheap or even good. I did a part today at work and held a 0.0005 tolerance and I still wouldn't want to make all that dumb ----. The time, money, and tooling you need to invest is not worth it for exhaust valves, head bolts and all that other dumb ---- that costs under $100 to buy.
Before you make your next thread asking how to machine a muffler or a headgasket, ask yourself, "what is the likelyhood of me actually making this part"
Before you make your next thread asking how to machine a muffler or a headgasket, ask yourself, "what is the likelyhood of me actually making this part"
#3
Re: material for exhaust valves
thanks for your concern whitey, but i was just wondering because the shop owes me a bunch of cash and i figured that i could get paid in work, ooh and its not a small shop with a few machines, over 5000 square feet, 18 machinists, 3 brand new HAAS CNC's...
as for the hhead bolts, that was to prove buddy wrong and i was just wondering about valves, because well i dont wanna be gehtto and too (whitey bend ish) im sure if it would cost you no more than materials you would do this as well
as for the hhead bolts, that was to prove buddy wrong and i was just wondering about valves, because well i dont wanna be gehtto and too (whitey bend ish) im sure if it would cost you no more than materials you would do this as well
#5
Re: material for exhaust valves
Originally Posted by sailman
because well i dont wanna be gehtto and too (whitey bend ish) im sure if it would cost you no more than materials you would do this as well
lol becuase contemplating machining your own valves from mild steel to save a couple bucks is far from ghetto
Post pics when your done
#6
Re: material for exhaust valves
Originally Posted by sailman
well as many may know the higher temperatures on the exhaust valve wen running water injection could be an issue
Link me to wherever... whomever... makes these claims and I will smash them into a fragment.
Originally Posted by sailman
I wanna look into making a set of billet steel or billet stainless exhaust valves.
Valves are not billet, and if you had a set made I would not trust them. Notice any valve made since pre-WW2. The stem is made out of a friction-friendly stainless alloy, the head out of a temperature-friendly alloy, and the head is spun very very very fast, brought into contact with the stem for a split instant so it friction-welds itself on + released from whatever fixture is spinning it.
Originally Posted by sailman
I'm leaning towards stainless because of teh amount of steam flowing over the valve
PS - the record for a bone stock LS head, strapped to a sleeved/built 84mm LS bottom end, is in the 750 whp range. You are making the n00b error of trying to over build your engine to band-aid your own ignorance. Engines are made of metal, and therefore strong - the soft meat between your ears trying to bend the metal engine to it's will is weak and prone to failure. What are you going to do? Spend more money? Or start thinking *real* hard?
#7
Re: material for exhaust valves
I really dont think that there is steam in a water injected engine. Ask yourself how hot a combustion chamber gets and how hot the exhaust valve gets. The valves are going to be constantly dry. Once the water gets past the turbo and starts cooling in the exhaust is when you get actual measureable moisture.
Stock valves are going to be more than plenty. Pistons, rods, and headgasket are going to go way before the valves.
Stock valves are going to be more than plenty. Pistons, rods, and headgasket are going to go way before the valves.
#8
Re: material for exhaust valves
Ichigo Kurisagi, please refrain from making tech posts and stick to kicking ***.
If you heat wet steam to the point it dissassociates, the component H and O cannot join together to create water so they seek out Fe and Al to react with. This causes the pits in combustion chambers "that comes from detonation"
If you heat wet steam to the point it dissassociates, the component H and O cannot join together to create water so they seek out Fe and Al to react with. This causes the pits in combustion chambers "that comes from detonation"
#9
Re: material for exhaust valves
Originally Posted by Whitey
lol becuase contemplating machining your own valves from mild steel to save a couple bucks is far from ghetto
Post pics when your done
Go ahead and proof whitey and the rest of us og hmt guys wrong. If you want to cast your own block and make heads from scratch with your own port design and valves then just do it
Your way beyond any of us if you can design and do these parts
Also if you know anything about machine work a company doesnt do a one off part for 100 bucks hands down
For me to get a product i have been wanting to do for sometime and have already been able to get to work for myself will cost $5000 in orders just to do it hence why I havent
This is through rpm designs the guys who build the billet throttle bodies that so many companies sell
He's a small company 2 guys and it takes that so your mystery machine shop that will make valves for you are horrible business people. I would like there # so i can buy their equipment when they go out of business in the next 12 months.
Thanks
#10
Re: material for exhaust valves
Originally Posted by Ichi-Go
I really dont think that there is steam in a water injected engine. Ask yourself how hot a combustion chamber gets and how hot the exhaust valve gets. The valves are going to be constantly dry. Once the water gets past the turbo and starts cooling in the exhaust is when you get actual measureable moisture.
Stock valves are going to be more than plenty. Pistons, rods, and headgasket are going to go way before the valves.
Stock valves are going to be more than plenty. Pistons, rods, and headgasket are going to go way before the valves.