dinan CAI and water in engine

[e46driver]

I know there are talks about how Dinan CAI might suck in water cause the filter is mounted low. My question is has anyone with Dinan CAI ever experienced it?

If it is a real problem wouldn't Dinan change their design? So the question I have is how many people actually experienced this and how often do you hear about it sucking in water?

[psk145]

I've got the same intake setup on my supercharger so I'll answer this. I think its pretty much impossible to suck water that far up. Thats about 2-3 feet that water needs to travel up, and its very unlikely to happen unless you drive though a river. I wouldnt stress about it too much

[Kevlar]

Actually... they did a test on this on a Honda engine. If you completely submerge the filter in water... at idle, the engine has enough suction to suck water about 3-5 feet up an intake pipe ... at idle.

At redline... who knows. Of course, this is just what I have read. I have never experienced it because I don't have a DINAN intake, but that's just what I heard.

[Kevlar]

here's the article.

<a href="http://www.gr8ride.com/cgi-bin/pm/common/newProduct.jsp?channel=International&community=Asian&oid=110751">THE Water Injection Article</a> courtesty Sport Compact Car.

[T///MW]

I wouldn't worry about it...you have a lot of metal AND a filter dispersing the water from the CAI.

Stock engines will ingest water if you drive through a deep enough puddle too.

[Kevlar]

Originally posted by T///MW
Stock engines will ingest water if you drive through a deep enough puddle too.

I think the car would float away first.

[BAADDOG]

BOM, There have been no first hand posting by any Dinan driver.

Everyone jumps on the Dinan intake with a lot of 2nd or 3rd hand info/bs.

I guess it is possible for a "stupid" driver to attempt to cross a river of water and experience the hydro lock up, but I don't think it has ever happened.

Would you do it? The answer is always..No.

Keep u feet and intake dry,

[Stylin]

Noway.. that flood I drove through defintely woulda sucked in water concidering my front bumper was submergered. The wave from that jeep that flew by me spashed over my hood..!:eek: On a 2 lane highway with no place to go but through it.

It really all depends on where you live.. flash floods doesnt seem to happen to much in cali.. but come to NJ and I'll show u floods.. :D

[nodemgr]

I have actually gone through a carwash *shudder* and I think my Dinan CAI got somewhat soaked with water. When I left I hit the gas and there was a slight(.5s) hesitation as the water was sucked through the intake and then the car behaved normally.

This is my guess as to what happened. It happed more than once. Anyone think this is actually what happened?

[T///MW]

We had some serious flooding here in the Boston area this spring and I had to drive my car through some small ponds in order to get home at night.

I drive it all winter, I drive it through car washes, I have even entered it in a submarine race (j/k).

I have had zero issues.

My brother drove a stock 98 VW Golf through a puddle last winter and totalled the car....

I worry about my Dinan intake 0%

Tim

[Hyperion]

To be truthful, and accurate in the laws of physics, it is not actually a sucking that will make the water go up the intake, instead it is the loss of pressure on the inside of the tube, and the atmospheric pressure on the out side that really pushes the water up the intake. Just like how we drink soda through a straw, it cannot work with out the atmosphere, or if there was a hole in the straw. On the intake in question there is a hole at the highest point to allow for the placement of the temperature sensor, and in the event that the engine would be sucking up water at 997kg/m3(to the third power) and with the cross section of the intake being extreamly large to permit for free air flow, 4.5in (I think) then that would mean that the engine would have to extremly lower the pressure inside the intake to allow for the atmospheric pressure (1.01325×105 Pa; 760 mmHg; 14.6959 psi) to be able for the water to move up the intake. This number which I did not calculate most certianly would not be able to be reache by the engine at idel, but could possibly be reached at redline. However, as mentioned above there is a hole at the upperportion of the intake, and this would create a loss of suction and the water would only move up the intake a finite point until the balance between air being sucked intrough the temperature hole, and the weight of water came into balance. This is why it is really not feasable for such an event to occur, but in a real life situation, anything is possible. I talked with Steve Dinan, and he said that the issue with sucking up water was not only extremly slim next to impossible, but it was actually a scare tatic at one point used by competitors to try and make their products seem more enticing. Steve also made extreamly cleat that if this was to happen, that his company would replace any and all parts damaged, by the accident. The warranty they have on all products explains this immensly and is backed up 100% by the man in charge. If you do not believe me, just give him a ring, I have his number around here somewhere if you want it.

And before I forget, the only real reason I responded to this was because link provided did not work, does someone have a copy of the text, or a working hyperlink?

[Stylin]

Hole on top of the intake tube??

[Hyperion]

Not really a hole, it is more like a smaller tube for the placement of the temperature sensor.

[Kevlar]

Originally posted by Hyperion
And before I forget, the only real reason I responded to this was because link provided did not work, does someone have a copy of the text, or a working hyperlink?

Gr8Ride changed up their page...

Here is another link to the article

<a href="http://www.sportcompactcarweb.com/archives/tech/tech01_0401.shtml">The Water Ingestion Article</a>

[psk145]

good job hyperion, that was pretty impressive.

[Stylin]

Originally posted by Hyperion
Not really a hole, it is more like a smaller tube for the placement of the temperature sensor.

So this tube has to be sealed right??

[Hyperion]

Originally posted by Stylin


So this tube has to be sealed right??

It is sealed, but if you block off the end and create suction, I gander it is going to fail and let air pass through. However, when the filter element is not blocked off no air would pass through there, and it would be 100% effective.

Where is the temp sensor (sp) in the ECIS/AA one, does it even have a place for it, or did they just get rid of it altogther.

[Stylin]

The temp sensor is not separated anymore in the newer cars. Not exactly sure where it is.. anyone?