Using your methods, I turned a 289 headed 302h.o. into an absolute beast. You are something special! Thank you for what you do!

@hotrodray6802

5 ай бұрын

I'm working on it now👍👍🇺🇸

@dylanarnold4487

5 ай бұрын

Great vidja guys 🤙🏼 AAWWWOOO

I did a flow test on a stock airbox on a BA Falcon. Flowing from the outlet of the airbox (the tube that the intake attaches to) with the stock filter and over the radiator Snorkel, it flowed about 750cfm. Ditching the Snorkel jumped the reading upto 850. Changing the filter to a K&N it went to 920. Next was "just the lid, no filter" test. It flowed 1100. Adding the K&N dropped it to 1070. From there, the bottom of the box was opened to match the the 1070. I backed these up on the Turbo Barra found in a Territory, a 2350Kg SUV. With the Snorkel and stock air cleaner, its best was 15.3sec 1/4 mile. During the 3 test runs, each run lost 0.1sec due to heat soak. Changing to the K&N and open airbox, i managed a 14.97 (call it 15.0) with the next few showing the headsoak creep of -0.1sec. At the track, I found some cardboard and made a makeshift "cold air entry" from under the headlight. Time stabilized to 15.1sec. Sometimes, track testing is better than dyno testing. At the track, hoods are down, and car airflow are taken into account to get a time.

They don't call back because they know they're full of BS.

I love your content David, I hope to attend one of your seminars in the near future. Keep up the great work disproving all the professionally-propagated BS!

Testing intake restriction on the car is more enlightening than on a flowbench. I have been doing this on all my cars since the 70's using a home made water column manometer. I think I first saw this in one of David's books. The last car I tested was a 2013 Boss 302. The stock system was quite restrictive. Negative pressure at the throttle body mouth was around 22" of water. With the Steeda intake it was around 8". I attended a free dyno day where they let me change intakes to do a before and after. On the Mustang dyno with stock intake it put down 395. With Steeda it was 405. The only legitimately street legal car (ie. California laws) that beat me at the time was a hemi Challenger that did 417.

Your videos are a national treasure.

@RowdyCM

5 ай бұрын

I totally agree!

Applying thermal insulation to the air filter box gives phenomenal results! Especially when the box is located close to the engine block or exhaust system. Each 10°C decrease in temperature increases the amount of oxygen in the air by 3.2%. Additionally, it reduces the tendency for knocking, which in engines capable of utilizing this, provides additional benefits. A nice bonus is the reduction of intake noise. I would also like to add that lowering the temperature in the intake by increasing the air density unfortunately causes an increase in flow resistance. Therefore, it is worth taking care of optimizing any imperfections in the intake system in order to fully utilize the benefits. And these are huge - you can achieve a temperature drop of even 20-30°C, which can result in an increase in power and torque of about 10%! And all this with little effort and almost for free! 👍

@65sohc

2 ай бұрын

The only time thermally insulating the box could possibly reduce IAT is at idle, at which time the engine is producing so little power it is insignificant. During normal operation, especially at large throttle openings, the air travels so fast through the system that any heat absorbed from the intake box/tube system is negligible. Engine Masters has a good video on this. The pick up point for the air is much more important. I had a 2013 Boss 302 that had an IAT readout from the factory (amazing. Even my 2023 C8 Corvette doesn't have that.) At idle in traffic IAT was around 135 degrees. At any speed above 35 mph it was within 1-2 degrees of ambient. The intake air pickup point was through the grill away from the radiator. IAT above idle was the same for the Steeda IAT as it was for the factory closed box system.

Thanks for another great video David.

Interesting stuff. I bought a Subaru Impreza with a dodgy pod filter that just sort of dangles in the engine bay where the original airbox would have sat. I'm looking at replacing that with a system which plumbs in via the original air intake port/hole, a pipe runs down inside the front wuarter panel and your new K&N pod filter sits just behind the original air vent holes in the Front bumper... It's not really a ram-air system because the filter just sits there in a big cavity inside the quarter panel, but at least it can only draw in cold air. Thet have a choice between silver and black so I'll definitely be going for silver now that I know the darker colours do actually make a difference to the air temperature, even though the black would have looked more stealth and factory, I'd prefer any possibility of performance gain, or at least preventing factors of performance robbing.

My BSA motocrosser with Lectron carburetor started life with a foam filter. One day in the dirt and my carburetor was coated orange red inside from the dust getting through. I then swapped it out and installed a K&N filter and pulled it off after another day in the dirt. The exterior was filthy with the same dust and inside, the carburetor was spotless - nothing got through. If it did, it was a particulate size that would never cause harm to an internal combustion engine. I could ride through a stream then immediately back into the dirt for the rest of the day and got the same results with a mud caked air filter. The engine never faltered nor did the fuel ratio change. The spark plugs never became sooty. This was back in the mid 70s. I have been using K&N filters on all my vehicles ever since.

"Whispering Stallion" i like it. Personally i like to have my builds quick and quiet. Thank you for sharing your 60+ years of winning experience.

Great content as always, loved the stories as well.

thanks for all of your information and knowlege shared. Now I am on my mission to look where it is the best way to get cold air in a sbc under hood.

Thank you for sharing your superb experience with us. I like name and concept of the "WHISPERING STALLION" !

Great way start the week sir. Thank you

On many n/a engines its worth to consider thst the air box might be an integral part of the resonance in the intake. The S2000 is one example where removing the airbox reduce the horsepower.

Thank you David. I remember you testing air cleaners in one of your old books. And remember the test on the cowl hood Malibu. Impressive. Thanks for all the great videos!

Thanks again David these gems keep coming 👍👏👏👏👏

Thank you so much for all the research! Very interesting information on the K&N or should I say cotton copies? Cool thing is, last week I watched an old video from 1994 where you talked a lot abput the mini a series engine (extremely informative material in my opinion) and you explained very good how these filters work! In 94‘ I was only three years old, but the info you share from your lifetime experience is true gold! Thank you, Mr. Vizard for all the super support and keep up your good work! Likes, subscribed and notified! Greetings from Germany! Alex

I love the “Whispering Stallion” concept. Why let the completion know you’ve got an extra something. Much less the not disturbing the neighbors angle.

Great video ... appreciate your attention to detail in all your testing ... it’s crazy how much BS is still out there

🔔😎🇺🇸 Reading the air temp using an air temerature probe installed just in front of the throttle body is a real eye opener. Youll be amazed how much hotter it is than true ambient.

we need to know if those eventuri filters provide any benefits due to their "special trumpet shape", because they are most expensive on the market (thousand of dollars). And on BMW M2 they even produce whistling sound as if there is a restriction when blowing on a throat of a bottle

Looking forward to your findings from your long term turbo pal ,,, !

Good info. Well Done.

Very good video. Thanks Mr. Vizard. In regards to ram air, it's not nothing. I'm excited to hear what you get, I suspect you will see a gain of 1/10th of a psi at 80mph with good ram air vs no ram air. Of course there is some ram benefit in the stock system, so I'm guessing actual gains will be a little less. It does start to add up as you go faster and faster.

Thank you DV, for the information. By the way, RockAuto has these K&N filters at a good closeout deal.

I register 3psi of air pressure in front of my truck at 70mph. I can't wait to see if getting a ram air type setup to take advantage of that can increase my boost pressure.

@UnityMotorSportsGarage

5 ай бұрын

You need to make a video on it! Andy

@hotrodray6802

5 ай бұрын

Mooney airplanes had a ram air-filter bypass. Not well designed but did add 1+" manifold pressure (1/2 psi) at 150 mph at altitude. From @ 10 to 10.5 psi. That's 5%.

This test was eye opening!

I've, ran a k&n air filters on one of my street vehicles. When, cleaning and re-oiling the filter, I noticed dust, in my throttle body. I'm, a stickler on maintenance. Filter, run and cleaned at, K&N specifications. Nevertheless, I stopped using K&N.

On my 93 mustang I draw air from my passenger fender. I wonder if I put a naca duct on that fender would it be able to draw air from it while driving

@lb9gta307

5 ай бұрын

You'd be better off ducting air from the front of the car. Pressure is much higher there.

Great video David! Would the ram air negate the pulse effect the engine gives? Ram air now becomes a constant?

Filters alter mass air flow and require a tune. The tune is a must have with different air inlet designs

i worked a few months repairing chainsahws and similar, they have various types of filters, only paper kept all off dirt. i saw some with broken filters, whith the carburetor cloog of little particles off wood, and still run... but only paper kept clean, i don know if kn can. but 15:00 if kn dont colapsed is because it filters less or it wass fitted in a side that gets cleaner air, come chainsahws had a very bad intake side, that sucks dirt, no other way. i dont say that kn is bad, but it can´t clean the same, if one gets cloog and other not, i dont think that can be bad for the engine, that little, very little, dust wont do wear your engine...

The only thing I could see with your testing is air flow direction through the filter itself, designed air flow. I understand your method. Some are going to say.

I put two filters on my 2 stroke and 4 stroke motors. Double filter head that reduces to the same intake tube. I test them against kongilter. I can't se a difference.

Could you provide more details on how intake pulses vibrating the K&N fibers increases filtration?

How much pulsation will the air filter experience on a turbo application though? Wouldn’t the turbo smooth out the pulsations at least some?

David, like your videos and testing. I was wondering if the small diameter and long coiled length of the tube can affect the reading on the manometer? I know that there is no flow through the tube, but do you still get frictional losses?

The engineers name was iirr Arlen Spenser

@RockingJOffroad

3 ай бұрын

D.V. Are you still doing the porting classes? If so where can I find information?

Question, if the engine/cylinder heads have a lower capacity for air flow than the stock air filter is capable of flow, is there any benefit to having an aftermarket air filter that has even more air flow capacity? Thanks for all you do.

What is your take on the fins that some air filtration systems have inside the box?

Sir help me please what will be the right race only cam for my 6.2 liter ls3 stock displacement of 376 cubic inch’s 10.7:1 compression please help me thank you guys love the show drag race only intake valves are 2.165

@cockycarguylswayne2211

5 ай бұрын

Help please 🙏🏽

Does turbo charging ,supercharging , nitrous, distances filter to engine affect pulse ?

Psalms 105:15

How will the oil from the filter affect the MAF sensor? Will it cause damage from oil fouling, etc?

@lb9gta307

5 ай бұрын

I've never had that issue in the 16 years I've run a K&N on my MAF only car which had a K&N befor I bought it. Didn't have that issue running a K&N directly on the MAF of my MAF+MAP daily for a decade either. Worst case scenario, it likely only happens within the first oil change interval since the filter only has so much oil in it and you have to buy a can of MAF cleaner. But just be careful when you clean and re-oil and you should be fine.

Hi David, I fully understand the K n N pulsing effect on a N A engine, and have a K n N on my supercharged mini cooper s, but does the charger (super or turbo) not smooth out flow and reduce the pulsing effect on the cotton fibres?

@DavidVizard

5 ай бұрын

Yes but not to the point of non fuction especially with 3 layers of cotton.

Impeach Mayorkas.

Nascar still use the proven cowl air induction, no ram air. Not sure what filter they use.

Does a turbocharged / supercharged engine still have "pulses" at the air filter?

@DavidVizard

4 ай бұрын

Yes but much reduced.

What about the 318 project? Been awhile.

@charlesperkins7746

5 ай бұрын

Look at last weeks live chat. There was an update near the last quarter of the chat

🇦🇬 Hi David , when do you hope to continue Golden Porting Rules? Been over 1 year since the last episode, hope to see a new one soon. 🙇🏾‍♂️

@DavidVizard

4 ай бұрын

Soon I hope.

@ICTPerformance268

4 ай бұрын

@@DavidVizard🇦🇬 Thanks for your timely response. 🙇🏾‍♂️

Are you still teaching classes? Where can I find scheduling and pricing

@DavidVizard

4 ай бұрын

Yes. We are planning to start late summer. Will announce when attendance sales start.

🥝✔️

❤

Black is a fine color due Black Body Radiation. Black radiates better than any other color.

@DavidVizard

5 ай бұрын

Yes it does but it has to be hotter in the first place.

@bowez9

5 ай бұрын

@@DavidVizard it doesn't have to be hotter it radiates more at every temperature. Further that given they are in areas not exposed to light there is no drawback. Convection and Conduction will be the same no matter the color.

@hotrodray6802

5 ай бұрын

​@@bowez9 Mine is hotter under the hood. Like 180* in summer.

@bowez9

5 ай бұрын

@@hotrodray6802 due to radiation from the engine bay.

@TomKunnas

Ай бұрын

Is heat radiation really the case when talking about intake boxes or ducts? Because heat radiation comes issue only in quite high temperatures...talking of exhaust side. So the "colour of intake" dont give measurable difference in power. But like David has said the smooth outer surface of intake manifold (specially aluminium one) has minor surface area and it wont take (convection issue) as much heat from outside.

DO NOT USE THESE FILTER WITHOUT TUNING YIUR CAR. YOUR STANDARD CAR MAY OR MAY-NOT COMPENSATE THE EXTRA AIR. I INSTALLED ONE ON MY STANDARD NISSAN DIESEL UTE AND IT RAN RICH SO MUCH SO IT CLOGGED MY DPF. RUN THE STANDARD FILTER UNLESS YOU TUNE THE EXTRA FLOW

Hey fellas..totally off Subject. Would a 3.75 in bore whatever stroke those idiots at engine power built as a 305 stroker make more power that a large bore short stroke engine of the same displacement? My money is on the big bore

Mr. Vizard, if I may be so bold as to offer some suggestions, in general and not specific to this particular video: 1. Most of the people on youtube have no clue about much of anything. Either they know and trust your advice or they don’t. Please stop waisting time talking about the clueless people who don’t and focus the message for those wise people who do. There’s no useful purpose to keep talking about them. Ignoring them entirely is the wise thing to do; for yourself and us. 2. KZread is not a made for TV show. Please stop wasting everyone’s time with long, pointless intros and just cut straight to the chase/topic. This is one of the worst mistakes that clueless youtubers do copycatting TV shows etc. in the mistaken belief that “this is how it’s done”. That’s the past, please think forward i.e. out of the box, no different than you’ve done all your life with ICE. Because it has no functional use on youtube and becomes quite old when trying to watch multiple videos in a row. It’s just as much a waste of your time editing it in as to either sit or FFWD through it. So just don’t. The above is not intended to be disrespectful or discourteous in any way. You’ve repeatedly stated that you do this for the viewers. It’d be a lot more beneficial to the viewer to leave out the non-beneficial time wasting and instead focus on the wisdom-rich subject matter that you possess so much of. Most sincere thanks and regards always. .

@DavidVizard

5 ай бұрын

,Duly noted. Let's see if we can meet something in the middle of what you are suggesting and what we are doing,

I am fairly positive that my unsubscribing to your channel won't mean diddly to you, but I will explain why I have. I was really interested in the Mission Impossible 318 build, then you completely bastardized the idea behind it. This turned into a "I am a legend and won't build something that doesn't make insane power per cube". It turned into more of a look at you and your builder status instead of going with what the backyard builder, or a young kid could try and recreate. You have a wealth of knowledge and that is wothout contestation, however, you have a rather large ego. You're building a high dollar, tricked out engine that is completely not what was intended. As such, I have unsubscribed from your channel and will no longer watch anything you post. I do hope you raise a large sum for St. Judes though , as they are respectable and do good things for children.

I remember that test and have used k@n ever since. With good results.