Its refreshing to see a company that has an understanding of thermodynamics.

Even having an understanding of this already, this was an incredible video. Very well done!

Using science and engineering to hack an inferior design and make it preform way better than it came from the factory makes for a very interesting video. MORE please.

I wish there was a banks video every week

I like Erik! Great presenter. Definitely have him do a bunch of videos, please.

We have a year's worth of video ideas lined up! But we want to know what you want to see. Comment below and we might just respond with a video.

I have always felt like my flow bench was a liar...you just proved me correct! And some people live and die by their flow numbers, this explains why they never beat us. Great vid!

As per usual Banks continue to innovate and educate the masses. They have a genuine love for physics and thermodynamics. Keep up the great work and informative videos. :)

Really good video. I like how you explained everything in detail before hitting us with the MAF sensor goodness we were expecting.

Gear heads class has begun. Today's episode " research and development". Lets hotrod a flow bench to get the results we seek in more power.

Banks Power upsetting people is absolutely the best KZfaq series.

I really appreciate the time and money Banks spends to educate the public with these videos. Thank You!

Holy crap...thank you so much for sharing the nerdy details for this...amazing and greatly appreciated. More of this type of thing is greatly appreciated.

Hi all at Banks. I'm no tuner, but have for many years believed that tuning was getting the most in and out with the least effort. It just takes people like you at Banks to work out how to measure what I believe. Love the videos.

I cant stop watching every video these guys make! I feel like a freakin genius after all I have learned. Bravo Gale for getting this information out to folks like me. Not a drop of energy or time wasted when it comes to making this content. I appreciate every second you have invested into this, Thank you.

Who ever came up with that Popcorn analogy deserves a Nobel Prize! That is simple but make the point perfectly.

This was talked about on the podcast, it's really a great setup. Very cool 😎

You guys are the best! I’ve been following Gale Banks for 60 years. I wish you were on the east coast!

Granted you're capable of reading the amount of air entering the components, but what about once it's gone through the intercooler. Then been compressed by the forced induction device, because that depends on several factors if my understanding of everything involved to actually reach the combustion chambers. First every connection has to be fully sealed against either a vacuum, or a positive pressure passing through it. This also includes the intercooler if one is used, but that still leaves a lot of mechanical connections, and then there's all the welds, and are seams in the tubing on both sides of the turbos, externally mounted blowers, and even blowers mounted directly onto the heads. There's a significant chance of leakage, and even with your testing setup this is highly possible Granted air is like water, and takes the path of least resistance, but that's still not a guarantee that's not an issue. From my years of hvac experience, in installing high pressure ductwork. The only absolute method of verification is to have a meter at the entrance of the associated ductwork, and after the all the connections through whatever is being tested to see if you're maintaining the same static pressure versus whatever your total volume of air exiting the ductwork. Otherwise you could very well have a sorce of entrance into your system, are a leak before you actually exit the device in this case. So the way your device is pressurized, are in the case if intake components your in a vacuum. So however many connections and openings for whatever device maybe there has to be sealed absolutely, otherwise you don't have an accurate reading for mass air sensor or anything else. You have a rough guesstimate at best, and I realize that this is taking it to the extreme, but based on the manor of which you're speaking, as well as the verbiage used. You're making it an absolute, that everything has been done to guarantee that this is the case, and unfortunately it's not. I'm sure it's a more accurate reading than most people are getting just because the use of the Maas airflow device, but then the devices connected on either side, or the mass airflow sensor itself isn't in a sealed connections either. So therefore you're not getting absolute accurate information yourselves. So not to be a PIA, but to make bold statements that ya'll are making to the public, which is part sales pitch, and some scientific proof of how ya'll have improved a method of testing. So take it to the absolute level of accuracy, and improve every connections inside and out of the flow bench as well as your method of connection to the testing device. Then tell us how you took these steps to ensure that your results are 100% accurate. Hopefully ya'll find this as positive input, and not someone being negative about what ya'll are I believe honestly trying to do to better your own data in research for your own products. That's how it's meant to be, and not just shooting holes into the steps you've taken to date.

Absolutely riveting information, for an "old School" diesel man. Keep up the great work. You have sent me back to the Physics Books.

I'm SO excited for the followup video to this! Great job, guys!

Thanks for the simple and through explanation.

Great video. Keeping it real with science. Love it. Very well done.

Very interesting and informative. I love the presentation. Thank you. I learned quite a bit today.

Amazingly well produced.

Another trip to Banks school!

Density efficiency, great information well presented. Thanks

The popcorn example was brilliant! I’ve long tried to find a good analogy for density vs temperature

This is epic!! Totally geeking out on this stuff! Thanks guys!! 😁🤟

Well done Eric 👌excellent class , following in your grandfathers footsteps 👏

This is an exceptionally well conceived and executed video.

Beautifully explained. Thanks Banks…

This is pure gold for a lot of people to get an actually understanding of how good MAF systems are these days and the problems with many ways of acquiring various forms of data has been in the past. For example if talking about tuning you can see the whole flow behavior of the engine and in relation to all other temperature and pressure data when the setup is starting to experience to choking and other forms of inefficiencies. On a MAP based system you basically have no idea, because you base everything on mostly assumptions and dont know what is actually happening flow wise with the engine with every adjustment.

Back in 1993 my old school hotrodder auto shop teacher built a flow bench powered by a 5hp vacuum from the sawdust collection system out of his brothers old cabinet shop. While not the same as a commercial bench, it was great for comparing flow at different valve lifts or seeing the before and after results of porting. Even then he lamented not knowing enough about computers, and there were no off the shelf solutions, to integrate a MAF into the system so the idea itself isn't all that new.

This video was very great. Keep up the good work on science please keep these videos coming.

These videos are Always educational & interesting. Thank you.

These vids are so informative. love it.

Very good explanations

I love free knowledge!! I can't imagine how many months I would've spent learning this using books 🤔🤔 thanks for the info!

What a fantastic video! Thank you!

Nicely explained. Though flow benches have been around well over 50 years. Grey Ross had one running at Coventry climax by the late 50's, Ricardo and Westlake many years previously

Great show. I love the analogy. By the why can't you use a variable iris similar to a camera instead of known plate hole cross-section(perhaps a little stronger), this would also give you adjustments on the fly (adaptive while Woking) this might increase acuity and some degree of automation if the control gear allows it.

I watched this video on the day you publicly released it. I have been waiting for the next video from this because a few years ago I asked on the PTS Flowbench forum about this exact idea. IOW this is not a new thought but you at least have the time, and more importantly the money, to devote to this. Please let us know how you go.

Great info!! Thank you!!!

Awesome explanation thank you all!

Great video thank you , you did a awesome job explaining that thank you

I was a USAF aircraft mechanic and as someone that went on to graduate college in '93 with a BS degree in Mechanical Engineering Technology and never used my degree, I love this shit 😁

Very educational,thankyou for taking time to explain 👍

Time for the everyone to get some learnin’ Banks101 is back in session!

Tuned port intake and open headers fixed all my racing problems.

you correct for temp and humidity. that only makes testing on different days more consistent. It still doesn't exploit a flow bench. How else do you use your bench?

Fantastic video!

One problem i always see not talked about is the Helmholtz effect in intake and exhaust giving above atmosferic filling without mechanical forced induction

Now you've got me curious about cookn up an STM32 processor to read a MAF to use for some of my own testing

Great , entertaining, educational and informative. Impressive Gale

Wow, I'm going to need to watch that a few more time. I will call it out with the old, in with the new data, OVERLOAD.

Great one. Thanks

The whole MAF idea is cool... and this would be groundbreaking... had I not read a blog ~20 years ago from a guy in his home garage doing the exact same thing using a door style MAF sensor to flow test air filters. Visions of Holley's Sky Ram abound and now I have to wait for the next thrilling installment to find out how you're compensating for all the holes in your "discovery"... like reading a book printed one chapter at a time...

When are we getting the next part of this video? I wanna hear about ford v ram v GM airflow numbers!

Roger. Received. Now what we need is a "How--To" for using the iDash and a specific MAF sensor to put a low-budget "flow-bench" together. Can we build something with an iDash, MAF sensor and a Shop-Vac to test our own ported heads, home-grown headers, etc?

Everything Banks touchs... turns to Gold.

Building a idash with thunderbolt port for external touchscreen monitor use would be a incredibly useful product update.

My question is how sensitive is it to suttle changes in port changes, When Smokey first built his flow bench (it was big enough that he could flow a whole engine.) at that time there were only a few across the country and they flowed heads at 10 inches Smokey found that he could make big changes and the flow did not change much. He then went on a quest the find a number that was sensitive enough to make very small changes to the port to show up, he settled on 28 inches which became the standard. To find out how much a head flows is one thing to have it sensitive enough to develop a port is another.

Well done . Have you got the bosch part number for the map sensor

Good job

What difference does mass air flow make when testing an elbow or exhaust on a flowbench when MAF if a variable of air temp, humidity and cfm? Air temp and humidity is not a constant on running engines or the everyday world. CFM capability is a constant and most people know that if you run colder air you make more hp with the same cfm. Will you run an exhaust system at full temps on the bench to simulate a running vehicle? If so the temperature at different points along the exhaust would have to match that of the installed exhaust with engine at power to keep density the same at each point along the exhaust to make it 'real world'

fixing & improving ........ a great relatioship😊

It would be great if you had a bit more detail on how one would go about wiring up one or 4 idash's with all those sensors. I would love to set this up at home, and would happily buy an idash or 4 to do so.

How do you ( or is it relevant ) to account for an engine drawing in air in pulses vs the vacuum motors drawing in air consistently?

When is the derringer coming out for the 2.8l duramax and 3.0 duramax

Can you build a cowl hood for a gmc sierra 2021 to get out the heat from the engine bay and whit a trap to close the hole for the winter.

Is there a reason that the tubes with the mass air flow sensor are so tall? Thanks. Great Video!

When is the next episode of this coming out that you were talking about at the end of the video? The one that was going to hurt feelings? Would be nice to have the follow-up to give practical examples and how to work with, use and interpret the values given by a bench setup like this - I assume this was the next episode you had in mind - but where is it?

Is there any attempt to make sure that the airflow is laminar as it approaches the MAF sensor?

You should look into class 8 truck market I would love to have an idash in my Pete

Great video.

If air temperature don´t chance in flowbench between measured object and orifice plate, I wonder is MAF really needed here? After all flowbech just compare two pressure drop. EDIT 1: I edit my comment by saying cant wait next video. I made my flowbench in 90s and currently have cfm and velocity measured in computer. I consider flowbench as tool to measure volume. Air speed is measured or calculated. Density is wonderful calculated unit in running engine where parts make pressure and temperature chances to air flow, but hard to understand how that can happen in stable flow where heat loads are not present. And yes I absolutely hope that Gale and his team are right and we can learn.

Will a MAF-sensor be available for the Idash stand alone ?

I am very interested in making a flow bench using a MAF sensor and a single iDash. Can you share information to order all the Banks components needed and the Bosch MAF sensor, and housing, part numbers?

How about the pulsing air effect as the air is flowing into cylinders that are turning the air flow on and off, as you get closer to the cylinder head that effect is getting much greater. Yet all the airflow devices are measuring constant air speed. Is there another breakthough in flow benches yet to come?

Is the density not the same when the Delta pressure is the same? There are some flaws to any given system , however where not measuring density on a flowbench, that's not its purpose. The purpose as a head porter is to measure the resistance to flow compared to size. In other words how effectively a given area is being utilized for flowing air. At 28" one would be 350 cfm or 146 cfm inch of area. Its changes with a different delta pressure. I understand how MAF works and it has its benifits when used in conjunction because it can show what happens to the density of the air as it goes through the port runner or system. A flowbench has more of an unlimited capacity unlike a engine that has a fixed volume. That where things can get a little messy for determining shape.

You guys are out here doing God's work. Truth!

This is all so confusing, I just pick a “hot air intake” based on how neat it looks when I open the hood to show it off. 😂😂😂😂

Yes, more please, thank you.

I’m a little inebriated, so I appreciate the popcorn visuals for easier understanding.

what up grade would you recomend for a 5.3 2004 g m c

So why wouldn't you calibrate the air bench with a local pressure and temperature correction factor the same as you would on a dyno?

Did they make a follow up video ?

Ahhhhh! So refreshing!

Minor editing error fwiw, engines being fixed volumes was repeated

When’s Part 2 being published?

Flow bench’s usually don’t operate in zone where compressibility is very significant as most people only use them at 28” which is far less What an engine generates so you are not really going to arrive at a different conclusion between component A vs B by doing that. I’d be hot rodding the bench to read pulsed flow

If I had an older vehicle (no ECM) can I use a MAF sensor (like a Bosh) and would the I-Dash be able to convert the data from the MAF without a ECM? If so, what about other pick up sensors like pressure, temp, etc.

Hello, what type of MAF sensor and tube do you use ? Do you have reference number ? How did you find MAF curve ? I am looking for a precise MAF sensor for a test bench :D

Can't wait to see people get upset...

Questions: How do you calibrate the MAF ? Now that there is also air pressure , temp and humidity playing a big role on the MAF reading, are you going to create a correction factor so you can compare tests from different conditions like dynos ? It will be good to see who the MAF differs between two part with similar CFM but a completely different design.

When's the next flow bench video coming out?

I see you 3D printed the MAF housing, how are you calibrating the MAF sensor to the housing; what is your ground truth?

If parts manufacturers started using MAF instead of CFM to advertise flow and HP potential from their parts theyd be able to easily manipulate the temperature ect and give higher then realistic lb/ft3 air flow or potential HP numbers

The latest 8 wire Bosch has multiple air temp sensors and specifically a humidity bulb and temp sensor. The microprocessor in the MAF meter calculates Density Altitude of the air mass and sends that to the ECM. It's a micro weather station the ECM uses to calculate PPH of AIR : PPH of FUEL for the stoich lambda correction of 1.0 Everything is a lean burn engine these days. You can not wait for a wide band to correct. Reason chevy had to go to this maf sensor a few years ago, as the 5 gas exhaust analyzer was to late to control the burn, so they added the 8 wire maf sensor up stream of the 5 wire....just to add the humidity bulb and made that IAT#1, only used 3 wires to do that. Everything made today, basically uses the same 8 wire bosch weather station sensor. MAP based tunes are EFI 1.0 and far from superior. If idiots understood, they definitely would not be deleting them like a monkey see do~do. Those are not tuners. Just idiots playing videogames with their tokens.