I Tried Vacuum-Modding my Old LEGO Briggs & Stratton Engine..... 

the main issue with this engine the fact that you had the vacuum conected to both valves...

To my understanding you need a exhaust valve, so that the vaccum can suck in air so the vaccum cleaner has something to suck on. Also i found to have the best result with vaccum engines that instead of taking those plates as valves you need to use the tires from the Speed Champions cars because of the rubber, the valve has a better seal.

with the original valve ports it would have ran better as you generally should have an exhaust valve. (or piston that has holes so the engine gets air from somewhere)

The engine couldn’t run because you don’t have an exhaust/intake value… the flywheel is not a problem. Also adding lubricant will make it smooth and run much better.

Missed name opportunity: 'Bricks n Stratton'

tysm for including me in the video!

Well done 👏

Awesome! I feel like major improvements can be done though

This is really cool, but as a somewhat experienced vacuum engine builder, i should tell u that a 6x6 piston is quite inefficient since a larger volume of air has to be sucked in by the vacuum then in a 4x4 piston. Also having 2 valves technically doesnt reduce efficiency but your valve design isnt the best because the valves dont let the piston go down freely enough cause of the way they are designed. Hope this helped lol

Hi, Not long ago I tried using this model as a base starting point for a vacuum engine. I found that you need to have 1:1 crank to cam ratio and also an exhaust valve. Also you should use a little bit of olive oil on the cylinder walls and valve seats to lubricate and seal components.

gotta love it

awesome ! you could try a different flywheel like a ligth and at the same time heavy but keep working you're doing great vids👍

You probably should make a rotary vacuum engine,they spin very fast and are compact,also you don't need a flywheel. You could gear it down as well.

Ayyyy I’ve been wanting this to happen

Nice bro

that's a pretty cool design, I also made something similar, well similar to vacuum powering a lego engine, except mine was based on a steam locomotive piston, like where you have the valve that goes back and forth switching from one side to the other, it worked quite well, sadly it had no way to reverse the direction.

Try making one of the valves putting in fresh atmosphere to not starve the cylinder of air, and try and counter balance the piston. You'll notice when it runs, it speeds up when the piston goes down and slows down when the piston raises

instead of using the 2 by 2 tiles as intake and exhaust valves, use a piece like Lego piece 2723 and it will work better. Also idk if this will work but Lego tires may fit on the disk thing.

To improve this alot first make sure both ports aren’t connected, you could also just do a 1:1 gear ratio from the crank to valves, lastly seal the valves off from the crank and make try to make a spring set up for the valves

Nice

Pretty cool the one idea I had was plumbers tape for the air leaks it should be thin enough that it doesn’t affect the Legos and would definitely help create a seal and without damaging the Legos that’s a bonus keep up the hard work👍

i don't know if you made this modification but you need one of the valves to let the air back in to the engine

it is possible I KNEW IT goooooooooooooood job btw

YES FINALLY!

maybe a tip you use 2 tires mayve you could use 4 instead of 2 i think it will work better

Instead of the tiles try the black round technic disc thingies that nobody knows the name of that are commonly used for LVE poppet valves. And it will run better as a "2 stroke" with 1:1 gearing for the camshaft but who knows, maybe it will work as a 4 stroke (with the cams offset 90° and both intake and exaust happening every other rotation.)

the problem is you need to have one of the valves for air and it might need to be quite big considering the size of the piston

usually when pp convert briggs to steam they add another lope on the cam or change the ration of the cam to 1:1 to your intake valve open when your piston go down and exhaust open when it go up , vacuum engine are reverse steam engine, so either change the ratio or the cam lope to be 180 deg so like you have to piece for one lope just turn one off them 180 deg on each lope and but you vacuum on the exhaust side

You should call it the bricks and Stratton

You had 2:1 gear ratio with cam lobes 180 degrees apart and intake connected to the exhaust. You need to have 1:1 gear ratio and make independent channels for valves :)

Funny thing I have one of those motors

We need to seeca Ali express karge super chelarger works? Can it be super cgarged with for stage.😅

nice lol

but why did you combine the input with the output? that just sounds like ur removing the entire point of the valves?

Do more

I would recommend making bigger valves and instead of using bricks for the cylinder walls, use Lego walls (1x6) plus lubricantion is highly recommended

It's running backwards! That's impressive bro!

is that a rainbow vacuum? mine sounds just like that one lol

Is the vacuum strong enough? I think the engine has too much displacement in the cylinder.

I built that engine with out any instructions but better.

What vacuum are you using? It sounds like a jet engine!

WOW THATS AMAZING DUDE HOW THE HELL DID YOU MAKE THAT

the problem is that you connected both valves, this engine is basicaly working like normal engine but it is powered by exhaust(vacuum) but as soon as you dont have any air intake engine needs to take air by itself, this is why it doesnt work right

What kind of vacuum is that is it a rainbow

What about a train engine?

Bricks and Stratton

make a vacuum pump out of lego

:)

I think it's partly because the piston can't draw in air

Make it work for real till it melts !

i mean to me it just doesnt seem like u know how to make vacuum engines but idk when i made a vaccum engine it ran first try so idk

for years ive been trying to make one, fail each time, do i need a very big flywheel

18 that says Briggs & Stratton will run we had a lawn mower had a hole in the side of the block and the damn thing still kept running we pull them off of scrap piles and junk yards and the lawn mowers we pull them but the joke and they started right up you're not going to get a bad one of the best lawn mower engines out there or Briggs & Stratton you might find one one might be a little bit better than that but you won't find no other one Briggs & Stratton is like almost number one out there but not quite but almost number one they always start no matter what unless you really smash him or if they're out of gas or your room till he ran out of the world he seized up

try and vacuum mod a lego v8 (official pieces)

You need to change the valve setup what you had in the beginning was perfect now you are sucking on the down stroke, I’m surprised it did anything

I have an idea, you need an even fly wheel not with weights on each side

Shouldn't that be "bricks & Stratton" 😉

you should make a Lego turbine engine is the most easiest engine to make

Can you juse dat engine to cut grass

Just makes just make sure the valve the vacuum is on is open when it goes up and the other valve to open air because this setup is completely wrong