I’ve met Jon Kasse at PRI. He is a nice guy and definitely the goto Ford guy.

It's awesome to see the flow is not smooth in the runner of the intake and also able to visualize harmonics at play!! Thanks for the video!

I never would have imagine fuel just washing down everything. I found that fascinating and not what I would have expected.

Joe,Esso (now Exxon Mobil) added HTA surfactant to their fuel for the original Put a Tiger In Your Tank ads in ~1964. Their lab in Elisabeth, NJ, put a camera in #1 port of a V-8, and replaced the exhaust with short stacks. Chassis dyno'd the whole car. At street loads, almost every cycle, a drop of fuel ~3/8 dia by 1/2 long went into the cylinder; then, when the valve was closed, the mist of fuel bounced around the valve head like a crown. Have you ever seen that 16mm B&W film?When HTA was added, the fuel drop broke up into a tiny particle mist. Before, there were 8 different exhaust gas colors from red to blue. With HTA, 8 baby blues.I also heard that flow separation or entrainment in the plenum depends on the distance from the base plate of the carburetor to the floor of the plenum. Are you familiar with that rule of thumb?I'd love to see a similar film shot w/ extremely high speed video, like 50,000 frames/sec.Unfortunately, I was not in attendance at AETC when you showed this. I would have loved to met you. I did my Master's on manifold design. Maybe I'll get to present my work in Indy next year?

After seeing this, I'm not worried that my somewhat scewed injector placement is the culprit of my heavily oscilating idle...

Wow, that was very interesting to see ! Great thanks!

So cool to see what goes on inside a running intake!

Is that why my doctor does that ?

I'm here because of a QR code in Billy Godbold's book 'High-performance Cams & Valvetrains". 😀

The fuel on the plenum walls,is that an occurrence at initial W.O.T. or a constant with airflow? Seems limiting plenum and more to I R. is a better option but tuning length and dia. would result in a very narrow band peak at resonance. Or fuel coming out of suspension due to reversion?

I believe we are still in the primitive stages of understanding how to manipulate fuel drop out from vapor to big droplets. It's a mixture of air and fuel mixing together. Which can be similar to mixing water and oil. One is heavier than the other. That video showed us just how bad equal distribution is in the plenum chamber. Carburetors do waste alot of fuel. Fuel injection is more precise. But each has its own drawbacks I would imagine. If someone like Kasse. Or anyone who really applies R&D to understand the goal of perfect fuel flow. These guys get to the top of the drag racing world by experimenting to find horsepower. And when they find it. They hold on to it tight like classified information in government military projects. It's how they find that advantage over all the other guys. Hopefully one day there will be another racing book written that reveals all the discoveries that came about over the last 50 years. A De-classified collection of racing engine secrets. The dark area surrounding Tunnel Rams and the black magic that go's with them in detail would be exciting to read about. The intake manifold can be configured to serve many different kinds of results and for different kinds of needs. Almost like rocket science. Will it be able to land on the moon 1st. 🏆

we done this 25 years ago,,on pro stock motors and what we found was a smooth intake was NOT good for RPM and a round port with a specific texture worked and the plenum box was tunable,,,,,now all intake ports are round and you have intake turtles

now that is is cool to see how the air and fuel react at high RPM awesome

This is super cool, but can someone explain to me what I learned here? 😁 Please.

Amazing video! What do you guys take from this?

You can see why Smokey did his hot vapour engine

Richard Holdener sent me here

There is an engineering master class in this video. So cool.

Really make you see why we sand blast the runners real coarse to stop that fuel from pooling up and get good atomization. I wonder what the difference of plastic intake to aluminum was on the numbers.

I put a sheet metal gasket below a 1 barrel and 2 barrel carb. Sawtooth around the perimeter, and a tab below down-side of the throttle plate, to take liquid fuel off of the sidewalls of the carb and manifold; and break it up, and pull it into the air flow. 2 mpg improvement and you already use a carb/manifold gasket.

My girlfriend is jealous of Jon's intake runner.

Wow... 😲😎

Using a slow motion camera would have allowed us to see standing waves and other detriments to efficient flow.

Seeing forst hand the effects of fuel separation helps to explain why port fuel injection is so much more efficient.

lot of fuel seperation , makes me wonder when porters say they can eliminate this

I think, Jon has invented a great parts washer. I does wonders on his grimy fingers. I hope, he's been using that manifold, after chowing down on every chicken bucket

We did this on one of our Super Stock Hemi's but it was only the lid....after these engines make a few passes the C-25 racing fuel will leave stains just like a dye....

Killer video!!!!!! to me it seems to run up ok! But Looks like it might be running RICH!?!?!?. anyways love the video!!! 10 stars!!!

And what did we learn???

Gigiddy gigiddy......

You cannot possibly still say carburetors are better than FI after seeing this. Even port FI doesn't piss fuel everywhere. How are they supposed to accurately control the A/F ratio with all that going on?

Great description of why electronic fuel injection is so much more efficient than carburetion. Explains why modern little engines put out the same horsepower as big muscle car engines of the 70s.

A person can see that the cylinder has to be filled with a wash of gasoline with a carburetor. No wonder why modern fuel injection engines last so much longer. I recently pulled the heads off a 3.0 Ford Taurus engine after 310,000 miles, and the cylinder taper was only .003". That amount of wear would have been more like after 50,000 miles with a carburetor