Thinking about putting a cold air intake kit on my 2.8. Have used K&N systems on previous cars. Any favorite choices in brands or anything I need to stay away from
what cold air intake brand
- Thread starter 2DunnsZ3
- Start date
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- Oct 19, 2014
- Points
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- Model of Z
- 2.2i Sport
I've heard in the past that K&N filters aren't advisable on these due to the oil that the filter relies on to work interfering with the MAF. No actual experience of it myself, just what I've heard. The same would apply to any other oiled filter.
I used an open ended Ramair on my Z4. Awesome sound.
Tony.
Tony.
Last edited:
I run a Simota on my 2.8.
Ohhhh! Well thats why I am asking before I move forward
is that a no oil filter?
is that a no oil filter?
Another one here with a Ram Air filter
so why does ram air not use oil and k&N does. they look the same. can you install a K&N without using oil
- Joined
- Dec 8, 2011
- Points
- 145
There are four things that you should be looking to do if you want to increase performance.
1. Increase volumetric air flow by reducing restrictions to the air flow.
2. Increase volumetric air flow by "ramming" the air.
3. Increase volumetric air flow by using a more efficient filter.
4. Increase the mass air flow by cooling the air going into the engine.
#1 all the examples shown above do this as they have removed the restrictive air filter box. The standard air filter box has noise reduction characteristics inside it (such as reversing flow and baffles).
#2 "ramming" the air can make a big difference.
#3 you need to be assured that the filter that you choose can actually filter. Don't be tempted to run an unoiled K+N just because it flows well
.
#4 is very important and often overlooked. You lose 1% of mass air flow for for every 7°C of increased air temperature.
OBD testing will show what effect your changes have made. Testo is a very good free datalogger.
Here is a independent test that may convince you to take a different route, and concentrate on improving what you have already got...
https://nicoclub.com/archives/kn-vs-oem-filter.html
1. Increase volumetric air flow by reducing restrictions to the air flow.
2. Increase volumetric air flow by "ramming" the air.
3. Increase volumetric air flow by using a more efficient filter.
4. Increase the mass air flow by cooling the air going into the engine.
#1 all the examples shown above do this as they have removed the restrictive air filter box. The standard air filter box has noise reduction characteristics inside it (such as reversing flow and baffles).
#2 "ramming" the air can make a big difference.
#3 you need to be assured that the filter that you choose can actually filter. Don't be tempted to run an unoiled K+N just because it flows well
.#4 is very important and often overlooked. You lose 1% of mass air flow for for every 7°C of increased air temperature.
OBD testing will show what effect your changes have made. Testo is a very good free datalogger.
Here is a independent test that may convince you to take a different route, and concentrate on improving what you have already got...
https://nicoclub.com/archives/kn-vs-oem-filter.html
So what do you suggest if you think the aftermarket is not the right way to go.There are four things that you should be looking to do if you want to increase performance.
1. Increase volumetric air flow by reducing restrictions to the air flow.
2. Increase volumetric air flow by "ramming" the air.
3. Increase volumetric air flow by using a more efficient filter.
4. Increase the mass air flow by cooling the air going into the engine.
#1 all the examples shown above do this as they have removed the restrictive air filter box. The standard air filter box has noise reduction characteristics inside it (such as reversing flow and baffles).
#2 "ramming" the air can make a big difference.
#3 you need to be assured that the filter that you choose can actually filter. Don't be tempted to run an unoiled K+N just because it flows well
#4 is very important and often overlooked. You lose 1% of mass air flow for for every 7°C of increased air temperature.
OBD testing will show what effect your changes have made. Testo is a very good free datalogger.
Here is a independent test that may convince you to take a different route, and concentrate on improving what you have already got...
https://nicoclub.com/archives/kn-vs-oem-filter.html
so there is no oil reqired on the ram air? unlike K&N filtersAnother one here with a Ram Air filter
Thats correct, I had Ramair on my last Z
pingu has me so confused. he sent an article saying the free flowing filters just let more dirt in .
the article says your car is designed to run the best with the airflow it was designed for from the factory.
I cant seem to find which model number of RamAir fits my 97 2.8
Just measure the diameter of the MAF.
Tony.
Tony.
- Joined
- Dec 8, 2011
- Points
- 145
I went down the route of increasing the air flow through the standard air filter box...
https://zroadster.org/threads/air-filter-box-modification.26207/
The M already has cold air induction. The air enters the air filter box via a hose from the brake duct through the back of the headlight into the air filter box.
- Joined
- Dec 8, 2011
- Points
- 145
The statement about your car being "designed to run the best with the airflow it was designed for" is true for older cars, but your Z3 can adapt its fuel and ignition maps to accommodate more air. It is only when you start making very large adaptions that you need to remap the engine. You will be OK if you just add a different air filter.
Every change that you make will have pros and cons. The best pros and cons arrangement is poorer mpg when you give it the beans, but better mpg when you bimble. My original mpg range was 15-26, it is now closer to 10-30
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