On another forum I picked up the following about K&N Filters:


The K&N filter is a low restriction filter, do not use in dusty areas.
No real increase in horsepower, however, many claim better response.
Unhook the battery for at least 5 minutes so the computer will reset after you put the new filter in (or go back to the stock filter). Don't do it and the car won't run right.


The last part is interesting, any feedback on this?

All it means is that the fuel management computer is forced to re-evaluate the airflow charactertistics to account for the *potential* increase of airflow.

The last one is kinda true and kinda false. This idea comes to those companies who's engine computers reset after the battery is pulled. Then the car is able to "relearn" the environmental conditions around it and adjust how it runs accordingly. It won't run like crap.

In this case, the motor would adjust to the increase in air flow. The Toyota 5.7 does as well. This is how you get the tranny to relearn how to shift as well as get the motor to accept some minor adjustments.

As for the other arugments, I would have to agree with a caviot. The K&N style filter on a cold air intake can cause gains in HP. A drop in K&N will probably not. As well, from the factory, K&N filters are great, but they do require cleaning. The cleaning process require that you re-oil the filter. Many people put on too much oil in this process and the oil is then sucked up over the mass airflow sensor / throttle body and cause problems.

Lastly, they do allow more dust into the motor. I know Cummin's and Cat diesel both recommend against these filters for this reason.

I have one in my ATV. It does a good job, but I have it b/c I clog air filters every 150 miles. I decided to take the risk as Polaris charges 35 bucks for the paper filter. The K&N was 40 something.

Thanks Aviography,
Are you then saying it's a good idea or not worth the effort?

Thanks,

Keith

This all boils down to which K&N you are asking about. There is a drop in replacement, a short ram, and a cold air intake style.

After decades of using K&N I switched to an AEM Dryflow on a short ram intake. The AEM is more efficient (cleans better) than the K&N and only needs to be washed, dried, and reinstalled......no oiling at all.

If you are installing just a drop in filter there is no need to "reboot" the computer. You won't notice any difference but you'll never have to buy another filter. Any minor adjustments will be done within 100 miles. With the short ram or CAI it is a good idea. Since they both flow a great deal more air you benefit a little quicker by letting the ECM start off with the new parameters.

It's easy to reboot the computer and it doesn't hurt to know that you have gotten the most out of this "mod", regardless if it is actually worth any performance increase.

The last one is kinda true and kinda false. This idea comes to those companies who's engine computers reset after the battery is pulled. Then the car is able to "relearn" the environmental conditions around it and adjust how it runs accordingly. It won't run like crap.

In this case, the motor would adjust to the increase in air flow. The Toyota 5.7 does as well. This is how you get the tranny to relearn how to shift as well as get the motor to accept some minor adjustments.
Steve,
So the 08 Accord does not need to have the battery disconnected?

Thanks,

Keith

That is a good question. I don't think any car needs this, but it does reset some of those parameters if I'm not mistaken.


I won't hurt anything if you do this. Just make sure you have your radio code handy. It can't hurt anything, I'm sure there are some 8th gen guys who have a definitive answer for you.

Once again, which K&N are you installing???????????????? It's not that tough, just answer the question and we can give you a qualified answer. I have at least 30 years of experience with these filters (had to order them from England) but which filter are you asking about? Without your information we are lost.

Once again, which K&N are you installing???????????????? It's not that tough, just answer the question and we can give you a qualified answer. I have at least 30 years of experience with these filters (had to order them from England) but which filter are you asking about? Without your information we are lost.
Sorry, the replacemrnt filter.:notworthy

Drop it in and go, the computer will make the minor (if any) adjustments required within 100 miles of driving. I speak from experience, there is NO NEED to reset the computer. Should you go to a more drastic intake it will be necessary. I have used K&N filters since the early 1980's so I have a little time under my belt with these. This is also why I recommended the AEM filter IF you do a short RAM or cold air intake. K&N is the only one I'm aware of that makes a drop in replacement. Don't expect anything from it other than never having to replace it. I have had more than ten cars with K&N filters to base my statements on. Your call how you want to handle it.

Drop it in and go, the computer will make the minor (if any) adjustments required within 100 miles of driving. I speak from experience, there is NO NEED to reset the computer. Should you go to a more drastic intake it will be necessary. I have used K&N filters since the 1980's so I have a little time under my belt with these. This also why I recommended the AEM filter IF you do a short RAM or cold air intake. K&N is the only one I'm aware of that makes a drop in replacement. Don't expect anything from it other than never having to replace it. I have had more than ten cars with K&N filters to base my statements on. Your call how you want to handle it.Thanks, after your advice about WP, you have my trust.

Thank you for that. I try my best to shoot from experience and not from idiot posts via the WWW.

I have been using K&N air filter since I just bought the car. The engine sounds much better every time I floor the gas :-)

No power gain
No gas mileage gain

I use K&N air filter on all of my cars.

I have been using K&N air filter since I just bought the car. The engine sounds much better every time I floor the gas :-)

No power gain
No gas mileage gain

I use K&N air filter on all of my cars.
:lmao: So the car may not go any faster, but it sounds like it does, I like that.:yes: