Carb suggestions???

[panchothedog]

Hack is about 20 times more savvy on technology than I am. But something you said in post #59 really hit home with me. " Most devices are just a way for people to be lazier and lazier." I couldn't agree more. I suppose that has something to do with my dislike of the stuff. I fully realize that it allows humans to do things that were only in dreams, or science fiction 60 years ago, but at the same time I see people that have SO LITTLE knowledge between their ears that it's scary.
I guess if I had a lawn, I yell get off of it.

 

[Denny]

I yell at kids all the time.

 

[Edwin Spangler]

BTW, do you know how to make a VCR stop blinkin *12:00*?

Yes, set the time. Only for the power to go out and its blinking 12:00 for the next 3 months.

 

[SLM]

Hack is about 20 times more savvy on technology than I am. But something you said in post #59 really hit home with me. " Most devices are just a way for people to be lazier and lazier." I couldn't agree more. I suppose that has something to do with my dislike of the stuff. I fully realize that it allows humans to do things that were only in dreams, or science fiction 60 years ago, but at the same time I see people that have SO LITTLE knowledge between their ears that it's scary.
I guess if I had a lawn, I yell get off of it.

every technology will get misused one way or another, humans arent perfect, cant do much bout it

 

[SLM]

Hi I just want to apologize for the random ghosting I did on this forum lol
personal circumstances and finals have forced me to put all projects on hold.
HOWEVER, I did finish printing the manifold and test fitting it, I am currntly printing some gaskets for it and then I will permanetly install it, pencil in the picture is for size comparison

I should also mention that I found out about JBweld the other day and I gotta say, im reallty tempted to make a chassis with that instead of welding, anyone got experience with the stuff? scam or any good?

 

[Denny]

I should also mention that I found out about JBweld the other day and I gotta say, im reallty tempted to make a chassis with that instead of welding, anyone got experience with the stuff? scam or any good?

I think that is a great idea, you should totally do it!

I’m a big fan of natural selection.

 

[Edwin Spangler]

Hi I just want to apologize for the random ghosting I did on this forum lol
personal circumstances and finals have forced me to put all projects on hold.
HOWEVER, I did finish printing the manifold and test fitting it, I am currntly printing some gaskets for it and then I will permanetly install it, pencil in the picture is for size comparison

I should also mention that I found out about JBweld the other day and I gotta say, im reallty tempted to make a chassis with that instead of welding, anyone got experience with the stuff? scam or any good?

JB weld works perfectly, until it doesnt. Then it just fails catastrophically. -Usually sucking a bunch of the JB weld pieces into whatever you needed to glue.

 

[Master Hack]

Wait! Yer gonna use JB weld to put a chassis together?

 

[panchothedog]

You're going to use J B weld to build a chassis instead of welding it. And here I was just beginning to think that you were somewhat intelligent. Maybe you were just joking ( I hope so ). If you do, and after it fails, you could always try Elmers white glue. Aside from paper, I read somewhere on the internet that it's even stronger when working with steel tubing.

 

[SLM]

I think that is a great idea, you should totally do it!

I’m a big fan of natural selection.

Well i meant for some parts not all lol

 

[SLM]

You're going to use J B weld to build a chassis instead of welding it. And here I was just beginning to think that you were somewhat intelligent. Maybe you were just joking ( I hope so ). If you do, and after it fails, you could always try Elmers white glue. Aside from paper, I read somewhere on the internet that it's even stronger when working with steel tubing.

Paper? Wow i did not kw that, ill try it and see how it goes, i was also thinking hot glue
On a more serious note i wasnt kidding but like i said, i meant mostly some reinforcement to the existing frame, like flages and compressed members, i will admit that wasnt my brightest idea but desperate times desperate measures

 

[65ShelbyClone]

I jsut remembered, F1 engine blocks are actually 3d printed

No, actually they are not. The sand cores are made that way; the engine block is cast using conventional techniques.

Hi I need a carburetor that can handle 11000rpm without problems and can sustain either 19 or 30 hp while doing it, preferably on the cheaper side

What is significant about "either 19 or 30hp?" You later mentioned the engine is a Honda CB750. Those made a lot more than 30hp with factory carburetors in all generations and none of them revved to 11,000rpm.

Home 3D printing even now really just facilitates making crappy plastic prototypes quickly. It's not a replacement for conventional fabrication and molding/casting. Maybe someday.

 

[student👍]

No, actually they are not. The sand cores are made that way; the engine block is cast using conventional techniques.

you r right, they arent, thats mb, they did try it though, and porsche has already done 3d printed pistons and is working on making those mainstream

What is significant about "either 19 or 30hp?" You later mentioned the engine is a Honda CB750. Those made a lot more than 30hp with factory carburetors in all generations and none of them revved to 11,000rpm.

i could either do four carbs each supplying enough fuel to make 19hp per carb/cilinder or have a slightly less powerful twin carb setup with each carb supplying enough fuel to make 30hp per carb/ two cilinders.
I think that answers what you said about those engines making more than 30hp lol.
I know that they dont rev to 11000 but i figured i would prob want some wiggle room, since i want this to be reliable i wanted to overbuild it a bit.

Home 3D printing even now really just facilitates making crappy plastic prototypes quickly. It's not a replacement for conventional fabrication and molding/casting. Maybe someday.

idk what you experience is with 3d printing but personally i feel like the reason most people use it for crappy little toys is mostly because of space constraints, build size is limited for people who want to build anything bigger than a basketball.
About the plastic part, I feel like plastic has gained a reputation for being tacky and soft but I feel like most people dont realize how far materials technology has come, there´s a reason cars nowadays have so much plastic in them, most (very new) cars use plastic intake manifolds even on charged engines, because we have made plastics that are capable of handling heat and loads almost (ALMOST, i never said they are equal) like some metals, also, 3d printing gives you the oportunity to create more intricate and curvy shapes that werent possible before.
Also im not an expert on plastic technology, im just relating my own experience with it, I have made many structural 3d printed parts that have withstood all the abuse i put them through, I think that (strength wise) the limit to 3d printed parts is the fact that most people dont know how to design and print with the production process in mind, that may be because of, like you said, most people only print trinkets and toys, which i hate because it gives the 3d printing industry a bad look, they make it look like a toy for nerds who dont know how to make things by hand and sit in a computer all day, but i´ve personally had a great experience with structural usefull 3d prints and i think it has a lot of potential if use right

 

[SLM]

im sorry i logged into my other account, i didnt realize lol, just fyi for the future, that was my initial account from when i literally didnt know the difference between 2 and 4 stroke lol

 

[Denny]

im sorry i logged into my other account, i didnt realize lol, just fyi for the future, that was my initial account from when i literally didnt know the difference between 2 and 4 stroke lol

Yesterday?

 

[65ShelbyClone]

i could either do four carbs each supplying enough fuel to make 19hp per carb/cilinder or have a slightly less powerful twin carb setup with each carb supplying enough fuel to make 30hp per carb/ two cilinders.
I think that answers what you said about those engines making more than 30hp lol.
I know that they dont rev to 11000 but i figured i would prob want some wiggle room, since i want this to be reliable i wanted to overbuild it a bit.

That makes more sense, although the RPM by itself doesn't really matter. The carburetor just has to flow enough to support the necessary power regardless of what RPM the power occurs at. Generally carb size needs to go up as the number of cylinders connected to it goes down. With that in mind, you should be able to use a slightly smaller carb shared between two cylinders than one on each cylinder. For example, look at throttle body sizes on 450cc MX bikes; they're approaching 50mm at ~65bhp when a 42mm carb will support about 100bhp on a 1200cc v-twin and a 25mm restrictor will support about the same on a 600cc four.

idk what you experience is with 3d printing but personally i feel like the reason most people use it for crappy little toys is mostly because of space constraints, build size is limited for people who want to build anything bigger than a basketball.
About the plastic part, I feel like plastic has gained a reputation for being tacky and soft but I feel like most people dont realize how far materials technology has come, there´s a reason cars nowadays have so much plastic in them, most (very new) cars use plastic intake manifolds even on charged engines, because we have made plastics that are capable of handling heat and loads almost (ALMOST, i never said they are equal) like some metals, also, 3d printing gives you the oportunity to create more intricate and curvy shapes that werent possible before.
Also im not an expert on plastic technology, im just relating my own experience with it, I have made many structural 3d printed parts that have withstood all the abuse i put them through, I think that (strength wise) the limit to 3d printed parts is the fact that most people dont know how to design and print with the production process in mind, that may be because of, like you said, most people only print trinkets and toys, which i hate because it gives the 3d printing industry a bad look, they make it look like a toy for nerds who dont know how to make things by hand and sit in a computer all day, but i´ve personally had a great experience with structural usefull 3d prints and i think it has a lot of potential if use right

I look forward to seeing how the intake manifolds work for you.

 

[SLM]

Yesterday?

oook buddy

 

[SLM]

That makes more sense, although the RPM by itself doesn't really matter. The carburetor just has to flow enough to support the necessary power regardless of what RPM the power occurs at. Generally carb size needs to go up as the number of cylinders connected to it goes down. With that in mind, you should be able to use a slightly smaller carb shared between two cylinders than one on each cylinder. For example, look at throttle body sizes on 450cc MX bikes; they're approaching 50mm at ~65bhp when a 42mm carb will support about 100bhp on a 1200cc v-twin and a 25mm restrictor will support about the same on a 600cc four.

i figured some carbs have venturis shaped for different characteristics, i guess not then if yall say so.
I ended up going with two 34mm carbs since there is a kit for the bike that has the same size and is dne by a (i would hope so) professional, so i jsut copied their setup.

I look forward to seeing how the intake manifolds work for you.

thanks, I actually have them done already, I just havent had time to print and design the revised gaskets since ive been busy with school

 

[panchothedog]

Harrygonzalez, please take your annoying bullshyt and get away from this forum. What the h-ll makes you think that we want to read what you have written.

 

[Master Hack]

Harry is not just a spammer he's incredably stupid.