im interested in these coolant system re filler kit, but it requires a shop air compressor. Im not familiar with shop air compressor, will this one on amazon work?

 

For what it's worth, I found the 'top' question/answer for that re-filler kit says they pulled the vacuum with an exact same air compressor you're looking at getting to run this setup. So yeah, all that together will work, apparently...? :shrug:

 

yea i figured it out, the refiller kit nozzle creates vacuum, i was wondering how air compressor create suction since it only blows air out.

 

They're using the Venturi Effect. Which has its foundations in the Bernoulli Principle. Which itself has a cousin(?), the Coanda Effect, although I'm not sure that's involved with this, it's sort of a Laminar Flow sort of thing... Fluid dynamics are interesting things!

What's happening is this: air/fluid rushes around a restriction, pressures and flow changes. In this case, the air pressure comes in to the venturi chamber, which has a 'bottleneck' at the middle. This creates a higher flow, lower pressure in the bottleneck as the air rushes to get to the other side and fill that side of the chamber. This is called a pressure differential The lower pressure in the bottleneck can then be used for nefarious... er, I mean, useful purpose.

So having that lower differential pressure at the bottleneck, if you introduce an opening... or orifice... then that opening will have whatever's in it sucked in to the high flow, low pressure air and voila. Vacuum. Attach that to a hose... then that to a closed system... and tada, no more air in that system. After a bit, anyway, it takes a minute for the molecules to bounce about and find their way through the system into the venturi chamber.

This is the same system that's used in carburetors, paint guns, and many other pressure delivery and removal systems. A carburetor is nothing more than a gasoline removal system, removing gasoline from the bowl, and ultimately the gas tank. A paint gun is removing paint from the cup. It just so happens the byproduct of those removal systems can be used to run the engine or paint a panel, but really, they're just trying to clean out the container, let's be honest.

Here's a page with a nifty picture what I needed. Shows it right there.
https://www.coval-inc.com/vacuum-tec...um-generation/

Physics. It's weird and fun!

/And useful, of course.
//And dangerous if played with wrongly, so... wear safety glasses before operating a venturi...

 

Nerd!

 

Being an airplane nut will do that sometimes...

 

I have been out of the Air conditioning since a couple years after I got out of High School (Class of 1979) and I put my Explorer together and took it to a friends auto shop to evacuate the system and he put the Little Air powered Vacuum pump on my Explorer and I was amazed on how fast and how simple it was to use.

 

does anyone remember carburetors?
LOL

 

I do remember unscrewing the carburetor lid and flipping the lid and the filter over to allow more airflow into the motor. That is my total carburetor experience oh and then switching it back before my dad drove it!

 

My '65 Corvair has 4 of them....here's the engine out and in the car.

 

Oh yeah, I remember carbs. I still have 'em. Story time:

I have a '95 Honda PC800 Pacific Coast that has twins on it. She got unhappy. Real unhappy. Like, was I gonna make it the last mile to home unhappy. Glad I was close enough...

Rebuilt them 8 times before I figured out someone had messed around with a Dial-A-Jet system on it... which I'd removed because I like stock, thankyaverramuch, and also didn't know what the heck that even was. Figure out they'd also rejetted the carb. Had to get new jets to fix what they'd done, which was to lean out the carbs to let the DAJ add fuel, thereby... in a way... making the system exactly the same.

Except the other key to that was they'd *removed all the heat shields* from around that motor, and those are kinda important. The PC being all enclosed and carbureted, all the heat gets soaked up into the carbs, and boils off the gas. Leaning out the carbs. So to fix it, they didn't put the panels back in, they put this silly system... then had to put in the jets... THEN it was fine. Just... why.

Of course, I figured it all out and got the heat shields and man, THAT made a huge difference. Bike's real happy now. But folks... I'd trade it all for some fuel injection, honest. Carbs are beautiful pieces of machinery, truly. Almost magical. But man... they a little finicky...

Right. Back to your regularly scheduled compressor stories.

/Stock is best in some cases. This is one of them.

 

My Briggs and Stratton has one and so does the Honda, both are in lawn mowers but believe it or not the Subaru in the Pressure washer was Fuel injected