Originally Posted by willwren
Originally Posted by MPsulamon
This may be a stupid question and I can tell you are already tired of putting up with me questions.... but anyways.... I work with a bunch of car nuts that keep telling me not to get a CAI or FWI due to the risk of hydrolocking an engine. What is this all about and does the intense have anything built in to prevent this, like the AEM'* do?( I know AEM does not make one for our cars, just using them as an example.)
Ask them how likely it is that the filter will become fully submerged, and then figure out how much force would be required to draw that much water up into the intake, and then think about how long the engine will run before it stalls FROM LACK OF AIR before the water even got close.
FWI or CAI. If your motor hydrolocks, you pay shipping back and forth to Oregon with the parts, and I'll rebuild it for you for free labor.
Ask any of your car nut friends to find you ONE documented case on the internet where it actually happened. Not just urban legends or "I heard this happened".
It'* a myth.
Hydrolocking is not a myth.
I hydrolocked my Jeep and it now has a new motor in it because of it. Seized up so hard it wouldn't budge with a breaker bar and cheater. When this happened I did some searching about it and I did find other cases on the internet. Sometime you get lucky and it stalls quick enough that no damage is done, sometimes (in my case) all that rotating mass in the motor tries to compress a cylinder full of water and the rod does not like it. I never would have expected it to happen to me (the water was not much over 12" deep) but it only takes that one right situation, and I guess I found that situation.
The force to suck up the water? There is plenty. Think about the CFM of air your motor draws. Think about the vacuum it creates, about 10psi I think? Thatí* 23 ftH20. Meaning it will draw water in a tube strait up 23 feet.
With all that said though, it is not common on the road. If you try to cross a flooded road or drive through a large deep puddle you might have an issue. But IMO if you are doing that in a car you are asking for it anyway; and besides, you may have problem in that case with a stock intake as well. The (on-road) cases I had seen were mostly from lowered cars or small cars that put the CAI way low in the front of the car, such as below the bumper cover / front fascia. So of course an intake 4Ē off the ground is more likely to have a problem with this.
Iíd imagine a FWI on a bonnie is still off the ground fairly good (and somewhat protected) and should be not much more likely to have a problem than a stock box would. It is rare to happen on the road, but I donít want misleading info out there. Get yourself a FWI or CAI and enjoy it!