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It depends on the modification. Some certainly need it, some don't. Keep in mind a tune without having made any modifications at all is also worth it 90% of the time. Everyone states that OEM spend millions on development and their tunes must be perfect. The people saying this are never tuners with any actual experience looking at factory tunes! - Taz.
What a fantastic home grown business you have developed Andre (& Ben). Really enjoy your professional delivery and topics. Simon, aircraft engineer, CHCH.
As pointed out, some 'performace' filters can be worse than some of the better OEM paper filters - it depends. There are some that have been proven to be a LOT worse, such as the popular HKS 'mushroom' foam design that was very popular among those falling for marketing hype - worse, they were often placed in areas where heated underbonnet (hood for the heathans ;-) ) air could be drawn into the engine, further lowering the oxygen density. On that hype, most people see the oiled filters being marketed as being "xxx% more airflow", or "xxx% less restrictive" and think that automatically means that much more 'power', when a/ that filter restriction may be only a tiny part of the total between the intake opening and the throttle body/carburettor, often a fraction of a percent b/ that reflects an even smaller power/torque difference as the depression at the TB, or rather engine, will partially compensate by a deeper overal depression. One thing to watch out for, though, with using an aftermarket oiled filter (cloth or foam), is when they're used with 'hot wire' airflow metering systems - there can be problems with oil mist being carried in the airflow and being deposited on the wire, affecting it's reading. Obviously, this is even more of a problem when one is 'generous' with the oiling.
Playing around with the dyno in the early 90s a good example of cheap bhp gain on a E30 2.5 BMW was to remove the square bell mouth in the air filter box . Made 5 bhp all the way up the rev range . I designed the first supercharger kit for the Mazda MX5 when they first came to UK using the small Hitachi 'Rootes' type supercharger . Great fun little car . I think the company is still selling the kit ! Avoid placing a ' Fly's Eye' etc., filter at the front of the car too close to the ground if it rains where you live . An engine is a great water pump and will result in bent rods if you hit a puddle ! You can pick up accurate gauges used in the air con heating and ventialtion industry as millions are made that will measure either side of 0 in Pascals to cover the range of positive / negative pressures for about £40 . I chucked my manometer away 25 year ago . In the US these measure inches of water . If you get one that measures +- 1" water , you can use it for measuring aerodynamics e.g. high low pressure zones on the bodywork using a pitot tube or pressure button .
I have questions. You state that intake resonant chambers are to reduce noise in the cabin. I mean sure it does do that but isn't it actually a performance advantage when fully designed into the cars intake resonance by preventing high pressure areas when pressure waves in/out combine?
Hello, very interresting video, on a normal aspirated engine, for trying to move and increase the torque lower down the rpm range, is it better to lenthen the plenium pipes, the one connecting to the heads or lenghen the inlet pipe before the butter fly, Also thinking triying the AT shaftless throttle body. Thanks for this great video Best regards Konstantin
excellent content as always! pen and paper here! just a quick question: as far as i know, intake manifold length is important, related to torque and power curves, even more so on naturally aspirated engines. if you change the piping from the throttle body to the air filter, and taking into account when opening the throttle butterfly, does that piping count as intake manifold length? thank you very much and best regards!
That was excellent! Very relevant for me, as I’m about to design an intake for my Mk1 Escort..lols. 😑 I’ve heard good thing regarding an air-ram system. It’s funny you didn’t mention that. I guesss it’s not something that shows up on a Dyno really. Happy you left this full video up... 🇦🇺🤜🏼🤛🏼🍀🍀🍀😎
@@SMAC364 I guess I misunderstood. It sounded like he said that induction noise was a sacrifice, rather than a benefit. Noise isn't worth sacrificing power, of course.
I use K&N a lot. MX bike filters are oiled too, I've always hit it with a heat gun or let it bake out in the sun before installing. Thanks for the info
There are a few test done on filterelements and its not very clear cut. Often it seems like the paper filter is more than good enough. Cloth type filters with oil like k&n usually does not filter as effective as paper either so depending on what kind of racing you do it might not be such a good filter.
Of course but most people aren't racing on dirt....One thing so-called rally enthusiast forget is that quite a few rallies on the WRC tour never see any dirt. Conversely most of the rallies in the US/Canada are run on dirt, hmmm. I think this is just an idealized version of what the drivers in the series want to do which is race on dirt, not right or wrong but these jacked up compact cars aren't fast on the street either...
On the Honda Civic fk8 Type R motor, the k20c1 head it’s the fuel tumble port that restricts the intake. Once opened up by hand or cnc the cfm doubles to 300cfm. There’s an older video by Hondata that compares all the aftermarket cai at the time and the stock airbox outperformed all of them. The Honda engineers did a good job of making the stock intake and stock airbox very efficient.
It depends on how well it's implimented, but around 1.1% and 2.2% seems to be about right at 100 and 200mph, respectively. A big part of it is the potential for a lower intake temperature adding air density.
Bosch used the "trapdoor" style MAF sensor for several decades, so they were fitted to many brands by the millions until the hot wire sensors came along.
I just wanted to say one thing. On the vehicle I own the engine is common across the various platforms which is the 1.6L turbocharged engine from Hyundai/Kia. Two things cause restriction. Two 45 degree bends before the air hit the air box. After the air box is smooth but goes straight into corigated rubber pipe. All the aftermarket intakes smooth both area's either by using a open element filter with shielding or a smaller air box with a straight shot from the radiator support into the new air box. There are obvious gains there. The problem I had was cost vs benefit of adding something else. It was similar in cost to a basic nitrous oxide system which people often don't use in combination with turbocharged engines but it's gaining in popularity for obvious reasons. Now that I have the nitrous system with progressive control, I don't mind getting the intake which is easily worth 10-15 hp in combination with a new longer intake scoop.
Foooook..."port and polishing is just something Im not interested in learning"... WTF!!! That is the one thing that takes a low hp motor and makes it a wild motor is porting. Theres porting for NA and theres porting for boost. Both are worth learning. ; )
@ high performance academy, great channel I’m learning lots from you. I have a quick question, which shape air filter have you seen the best results from for a diesel for example long coke bottle style vs wide KFC bucket style vs panel filter. Thanks in advance 👍
Great. Indeed, bigger is not always better. People have to learn a bit about fluids mechanics. Especially some special and most interesting properties as Venturi effect used in both intakes and exhaust to adjust flow speed and/or flow pressure as well as noise level.
I have read that if free air i.e. no pressure just intake, is required to go through a 90 degree angle, it is equivalent to around 36 feet of straight pipe?
On my toyota Matrix with the 1zz-fe engine when I unclipped my airbox clips, allowing air straight in unfiltered, it gave the car enough power to chirp the tires in first and second plus added a ton of induction noise. When I clipped it back together it couldn't chirp the tires anymore. But I also had the exhaust straight piped so with stock exhaust I don't know if it would give you as much of a boost. But it is a good example to illustrate that sometimes the restriction gain of a hot air intake will be an overall benefit. But again in this case the stock intake was designed for economy and was very long and narrow with many bends in it so it's not a big surprise that eliminating that along with the air filter gave as much boost as it did.
As opposed to your cold ear? I'm not even sure what is my hot and cold side when it comes to my ears. Generally not something we tinker with, air on the other hand... 😎 Everyone talks weird when they don't have the same accent as you eh! - Taz.
@@hpa101 Just ribbing you. You've got great content! Though I must say the first time you said "headlights" I genuinely thought you meant "HID lights", as in high intensity discharge.. and I got confused wondering why that'd make any specific difference :D
We don't mind the ribbing at all. I mean you think it's odd for you, try living with 5 million people who talk like this 😂 My partner is German and I have absolutely ruined her English accent and vocabulary, it's something I'm rather proud of 😅 We like to keep you on your toes mate! Cheers for the ribbing 🤘- Taz.
