Another supercharger post

[Crappy212go kart]

It will explode long before it makes boost. I’m sorry.

Maybe, kinda in this thing to see what happens

 

[Crappy212go kart]

ok i have some pics of how im gonna mount it up to the motor. First thing will be to move the gas tank to a different (and probably more inconvenient but who really cares) spot and then I will create the supercharger bracket using the gas tank studs. after that I will attempt to set up pulleys and we'll see where that takes us. As you have seen, there is no good way to mount the carb to the supercharger, so I am just going to do a blow through setup. @Sparkwizard if I need one of those ammo boxes I'll give you a holler, I really appreciate the offer. And I am going to run a boost reference line to the vent on the tank, thanks for that idea Mr sparkwizard.

What have y'all run for charge pipes? considering using something similar to like the hose on a vacuum cleaner cause its flexible and looks like one of those old school Paxton supercharged gt350's but I still have to figure that out.

 

[Sparkwizard]

I suggest you follow @Denny 's advice and spin that blower to its max before you connect it to your carb. You don't want that inside your engine and you don't want to be near it if it lets go.

It looks like you could put that carb in a box, seal it, seal the cable and gas hose to the box, run a boost line to the gas tank and solve a whole lot of problems.

 

[Crappy212go kart]

Ok then I can see how it makes sense. Correct me if I’m wrong but I suppose I should hook it up to the engine and not connect the pipe to anything and see what happens?

 

[Thepartsguy]

A shaft driven turbo wouldn’t it be a pro charger? And that thing isn’t doing 4,000 rpm near me. 40,000!?!?!

Have him print a second one for display as it‘s not gonna last long. The 3d print engines on Camden bowens youtube never last long.

 

[Crappy212go kart]

Well I guess I could always run a 1 to 1 for 20,000 or even a reduction of somekind. Also I could get it reprinted in a stronger material, think I’m gonna just spin this one up and hide behind a wall or something to see if it splodes. If it does it’ll be one heck of a video, and I could just reprint it. I’ll work on getting it durability tested first I guess.

 

[65ShelbyClone]

What is your actual end goal with this? Looks, function, something else? I would advise not trying to use a plastic centrifugal supercharger. I would advise not going blow-through with the carb. Blow-through has potentially significant benefits like ability to add an intercooler, but it's far more complicated to tune.

A cheap Chinese copy of an Aisin AMR300 roots blower would be the most robust and straightforward way to supercharge your engine. It moves 300cc of air per revolution, so underdriving it at 1:2 would net roughly 6psi of boost.

 

[Crappy212go kart]

Ok sorry for the delayed update, but I was doing some durability testing on the blower and the input shaft snapped off with about 15 lbs of force on it. I was attempting to see how much it could take, since I think I would need to run a belt tensioner and wanted to see what it could do (was gonna stop at 20 lbs lol). I will post pics asap, but I will definitely be reprinting it in Carbon Fiber reinforced PETG filament, which is like $25 for a roll of it. I figure it should safely hold to about 15,000 -20,000 rpms if if the print is good quality, but I'm probably gonna need to underdrive it a little. (Still using a blast shield btw don't worry.) I also am going to limit the rpms to 5250 for safety, but also for that awesome limiter noise. Also to reply to the people who said I should buy an actual supercharger, or run something else, blah blah blah, the whole reason I am doing this thing is to see what I can make, not what I can buy. I do think that your advice is valuable to me because this is my first time building anything past intake and exhaust. But I'm not just gonna buy stuff cause I don't have like $300 for a Chinese supercharger. Im doing it with the spirit of grassroots man. Also my buddy is buying an actual turbo and he's gonna put it on HIS 212, so it's like a little built vs bought challenge. But it's mostly in the name of figuring out something cool that I can tell my kids about someday. You dig?

 

[Sparkwizard]

I played aroung with old Kirby and Royal vacuum cleaners for a couple of years. They have nice impellers and aluminum housings, high speed bearings and they move a lot of air and will build pressure.
That wide snout unclips from the front, leaving a housing that looks like a turbocharger. EBay has parts and whole machines.

 

[ezcome-ezgo]

Plus it is a Kirby. Sold door-to-door in the Golden Age.