Hot answers tagged

16

Does this mod ever give a measurable increase in power? tl;dr: yes, sometimes it works well. But... Your picture is a good illustration of some of the problems with just saying "cold air intake" and expecting that to mean the same thing to all people. Let's break down the pieces of the puzzle and talk about how those might help or hurt: Filter: ...


10

It will have no affect on the longevity of the engine or components as long as you get one with a decent filter on it. You'll have to check reviews on different elements to ensure you are getting one which is good. We'll not mention which ones I think are better, as that gets into the realm of both shopping and opinion. In and of themselves, CAI's will not ...


9

"Performance" at all costs isn't what a manufacturer wants. They want the best, most efficient performance that will still provide the engine a very long lifetime and keep the cost down as much as possible Some things an aftermarket filter might change: More expensive Requires more maintenance (like an "oiled" K&N Filter) Could increase engine noise ...


9

I wouldn't You have a carburetor on that bike. You may need to do some adjustments, if not, you will make the air fuel ratio leaner and that will be really hard on your exhaust valves. The more oxygen you have in your air fuel ratio beyond 14.1:1 will increase your combustion temperature. This, in turn, can damage your exhaust valves due to too much ...


8

Normally the idea is to get more air into the engine using a less restrictive air filter. As an engine is basically an air pump, getting more oxygen and more fuel into the engine usually equals a bigger bang and thus hopefully more power. That said, in order to get a meaningful improvement using a performance air filter, the main restriction needs to be the ...


8

Jetting a carburettor - short answer You will require two things more than likely. A size larger main jet An adjustable needle jet Smoothbore Carburettor Image Your main jet sits in the float bowl, it's number 11. Off idle and higher the main jet contributes more and more to air fuel mixture as you open the throttle to wide open where the main jet ...


8

The point is to feel like you've done something cool to your car and freed it from the shackles of The Man/the OEM intake. The primary benefit of Cold Air Intakes is to the bank account of the kit manufacturer, the secondary benefit is your car making a nicer noise, if you like the sound of an aftermarket intake. There's been a few debunkings of CAIs over ...


8

Some people think that a cold air intake will generally improve engine performance, allowing fuel to combust at lower temperatures, increasing fuel efficiency. They believe the lower temperature is actually better for the engine. Performance air filters, if you get a good quality one, might typically allow more air flow while reducing foreign particulate ...


7

If it was just a normal paper filter it is fine. If it is a re-usable washable filter then then I would suggest a wash and oiling procedure according to the manufacturer instructions.


7

Are you talking about the in-cabin air filter, or the engine air filter? In either case, the answer is no. I mean you can do it, but the filter will not work like it is supposed to afterwards. The reason for this is they are made of paper. When you get them wet like you are suggesting, it destroys the element. As to the why you have to change them, once ...


7

Other possible sources: Vacuum Leak Other Ignition item (Plug Wires, Distributer, etc.) Really poor fuel Air Filter Blocked Exhaust Blockage I would start with the spark plugs. Take them out and see if they can give any indication as to the true problem. See this answer for more info (While you have them out, replace them if you need to). Then start ...


7

You want to be getting as much cold air as possible, as colder air is denser and thus gives your engine more oxygen for a given volume (and thus more power/better efficiency) - that's why the filter in the picture is surrounded be shields, to prevent it drawing in warm air from the engine bay - I'd assume that area in front that filter is open to atmosphere ...


7

An air filter that is severely restricting air flow can increase oil use. It is not common. If the air filter is restricted enough a low pressure condition is set up in the intake tube and PCV system. Oil is pulled from the upper valve cover oil/air separator cavities through the PCV fresh air hose into the intake tube. If this is happening there will be ...


7

It depends. Just because an intake can flow more air mass doesn't guarantee that the engine will utilize it. The intake is part of a system of components. The engine produces power by managing air flow into and out of the combustion chamber. There are usually other actors involved: Intake side. Carburetors, throttle bodies, intake manifolds, intake ...


7

I don't have any empirical evidence for this, but would say no for two reasons: An air filter will collect more dust, dirt, and debris until it gets so full that it starts pushing the older dust, dirt, and debris through the filter, which is what you are trying to prevent in the first place. As the air filter collects more dust, dirt, and debris, the ...


7

It all depends on what you mean by getting better. It is possible that, as the very small holes in the filter that let air through start to trap particles, the places where air can get through will get smaller and smaller. Therefore the filter will start to trap smaller and smaller particles. The air filter may get more efficient at filtering, but it will ...


7

Modern gasoline engines have sensors to measure the amount of air that enters the engine. The ECU then injects fuel to give the correct mixture to get the most efficient burn. A dirty air filter will first show itself by limiting the flow of air at high throttle positions. Rather than causing a rich mixture however, the ECU will see the low air flow and ...


6

I've never experienced performance drops with good renewable filters. Most engines perform slightly better with a good filter in especially the low and high RPM ranges. A bad/cheap filter is not a good choice, some have too much oil (to catch the dust) and this clogs up the AFM until eventually your "check engine" warning light turns on. A cold/open air ...


5

Since its paper based, your ability to clean it is somewhat limited. Mechanically agitating it (i.e. with a brush) is iffy since you run the risk of damaging the filter element. You can try shooting compressed air from the opposite direction of the filter but that really only removes the larger chunks of dirt, and if you're not careful, can also damage the ...


5

On my most recent car before my current car, I put in a K&N air filter. I believe I saw a minor improvement in horsepower, but it could also have been the placebo effect. As to your questions: You can save money with a K&N as long as the following are true: You clean/oil the filter at the recommended intervals You don't live in an excessively ...


5

If you use more than one air filter, you will make it harder for the engine to suck air into the intake manifold, meaning you will lose power. Less restrictive filters will give you more performance, but will allow more dirt into the engine. If you use something like a cone filter (like in the second picture), you will have a change in sound, especially ...


5

depends on if you have carburetors or fuel injection If you have a carburetor Cons You will make the bike have a lean condition Backfire on deceleration More oxygen will create more engine heat and this will cause additional wear on components You could burn your exhaust valves Pros You could buy a jet kit and pipe to go with it and get a few extra ...


5

There is no need to reprogram the ECU This is for a couple of reasons: The engine barely feels a difference Contrary to what the name implies, a "free-flowing" intake impacts the pressure at the valve inlet and not the volume of fresh inlet air per cycle. Here are the numbers to back it up: K&N provide detailed test data for the Yamaha R15, which ...


5

Specifically a foam filter for a lawn mower needs oiled, but just lightly. A foam filter lacks the ability to stop small particles as compared to a paper filter. The oil is added to make the filter "sticky" to these small particles giving the foam filter better filtering capability. As far as major engine damage, probably not. Worst case scenario the engine ...


5

If the prints are just on the seal, I wouldn't worry about it. You could possibly take some gentle cleaner (Windex or Formula 409 or the like which will clean grease) and make it pretty again. It won't, however, decrease the function of the filter in any way. If they got a bunch of oil on the element itself, you might want to think about it. Really nothing ...


4

If driving with multiple filters, your vehicle will lose performance. Your car will have a greater restriction in the intake system from having to pass through two separate elements. You would, however, have cleaner air coming into the system, but at a cost of the performance. You'll have to have more gas pedal to compensate which would cause other issues as ...


4

Unless you're going to spend a lot of money on a cleanable K&N type filter, I'm not aware of any real benefits to upgraded air filters - it's basically a folded sheet of cardboard after all... What is worth it, however, is getting a better quality oil filter. Many cheaper oil filters miss out the anti-drain-down valve that is commonly found on OEM ...


4

The exact answer to this is - It Depends... The reason for this is that your existing ECU, whether it be on a bike or in a car, has a range of inputs and a range out outputs, and a mapping between them. As long as your inputs are within the ranges expected, it may well be able to cope with the changed architecture, however there are two common problems: ...


4

Almost never? Mainly because they're really a 'hot air intake system'. This is especially true for cars using forced injection due to the high under-hood temperatures. If you want to reduce intake restriction look into a less restrictive 'panel' filter like a K&N. Even then, it really only matters if your car is intake (vs exhaust) limited and your ECU ...


3

Iwould say yes but only from the ecological point of view.Eliminating the solvents needed to clean the filter and the ease of replacement would be two strong points.



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