Intake question

[b-b00gie]

You wont have that problem unless the filter get completely submerged (or close to it) in water. The suction from the intake is not strong enough to suck some water up off the ground when it can easily suck in air. However if the filter is submerged and there is no air available, there will be no choice but to start sucking up water.

[jalterio]

Does the CAI filter wear much faster since it is exposed to road debris from driving? ie dirt roads and Illinois tollways. Do you have to cut into the frame in order to get this to fit? It seems the pop charge would be the way to go. But that is just my 2 cents.

[TeamNissan]

Doesn't anyone use ordinary K&N filters!?

You can just see mine if you concentrate!

[ragt20]

hey teamnissan is that a K&N if so how come tis a lot smaller then wot I have

[fuzzynaval]

has anyone bought a JWT pop charger for a 2002?

[TeamNissan]

Originally posted by ragt20
hey teamnissan is that a K&N if so how come tis a lot smaller then wot I have

That is probably because your K&N filter is made for more HP!! My K&N is only up to 200 HP!

[Free Flow]

The gains in CAI's are mainly due to the length of the tube and the air picking up speed as it funnels in. The cold air helps but not as much as the length of the tube.

Yes and no......the flow rate is indeed a major factor, but I don't think anymore or less than the cold air. I can't be exactly sure of the exact significance of each yet (in terms of numbers), but if you want, I can put together a Thermodynamic Analysis to demonstrate.

[b-b00gie]

Originally posted by Free Flow


Yes and no......the flow rate is indeed a major factor, but I don't think anymore or less than the cold air. I can't be exactly sure of the exact significance of each yet (in terms of numbers), but if you want, I can put together a Thermodynamic Analysis to demonstrate.

No need.

Theres been numerous tests by qualified individuals and car magazines.


The increased torque and horsepower in CAI's is mainly due to the length, not the cold air. The difference in air temp is barely a difference.

[P10DET]

Originally posted by Free Flow
Yes and no......the flow rate is indeed a major factor, but I don't think anymore or less than the cold air. I can't be exactly sure of the exact significance of each yet (in terms of numbers), but if you want, I can put together a Thermodynamic Analysis to demonstrate.

Don't bother.

The temperature of the air entering the filter under hood is pretty near ambient (just a few degrees). This is from data acquisition, not just speculation. It's also from multiple tests. Lew Shadoff from the SE-R Mailing List checked this as did one of the Kiwis here (sorry, I cannot remember who - I just woke up and am lucky I remember who I am ). Some folks on the Porsche 944 mailing list did the same thing and got the same results.

The power from a CAI is almost entirely due to the resonance (sp?) of the pipe, not the temperature of the air entering the filter.

[P10DET]

Originally posted by b-b00gie
The increased torque and horsepower in CAI's is mainly due to the length, not the cold air. The difference in air temp is barely a difference.

What he said.

You slid your answer in while I was typing. Interesting that we said almost the identical thing.

[P10DET]

Originally posted by b-b00gie
You wont have that problem unless the filter get completely submerged (or close to it) in water. The suction from the intake is not strong enough to suck some water up off the ground when it can easily suck in air. However if the filter is submerged and there is no air available, there will be no choice but to start sucking up water.

It won't suck it off the ground, but if water gets near the filter, it can be an issue.

Think of our cars as a 140+ hp shop vac.

[P10DET]

Originally posted by Free Flow
Do any of you know of anyone who actually did have a problem with water going up the intake (and weren't driving through floods)?

I personally know two people who have hydrolocked their engines (total write-off) using a CAI. Of course, when it rains here in Texas, it's more of an Act of God. The rains were quite heavy and there was water flowing down the street in both cases, as well as producing a big splash.

Risk is not just measured in chance however. It's also measure by effect. The chance may be small, but the effect is catastrophic.

So, if you live somewhere that almost never gets large amounts of rain where you have inches of water flowing down the street, you're probably OK if you remain aware of the dangers. If you live somewhere that does get heavy rains on a regular basis, it's a clear danger. A by-pass valve is in order.

[P10DET]

Originally posted by RCer
So, what do you think of this product www.turbozet.com a friend of mine has it in his primera, and he is very happy.

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Perhaps I could sell him a bridge. I guarantee it will give him an additional 30 hp and 10 mpg. I can't do anything for his emissions however.

[TeamNissan]

There was this bridge again!!*LOL*

[Free Flow]

The temperature of the air entering the filter under hood is pretty near ambient (just a few degrees). This is from data acquisition, not just speculation. It's also from multiple tests.

Yup, I agree wholeheartedly! I guess I worded my response badly (in terms of the quote I used, which clearly was refering to the CAI), and I should have explained.

What I really intended to say was that the air temp. is a major factor (in terms of efficiency) when there is a substantial temp. difference between ambient and intake.....the statement wasn't meant specifically for the CAI, but more general (like intercooling, etc.). Basically, I was trying to say that a few degrees DO make a big difference.
Sorry for the confusion! I'll be more clear in the future! :silly2:

I have seen those studies, particularly one involving a guy using heat wrap on his headers to limit heat transfer to the intake air, and the conclusions were the same as what you guys are saying.....the air intake temp. is suprisingly close to ambient.