thedream21479

Yeah...AEM had a recall on the first generation of bypass valve...there was a clip that they had people install...and the subsequent generations were fixed. They don't have any issue's with that now <knocking on the obscenely fake wood in the CL>

nismo

Question though, I have a generic water bypass, I don't think its an AEM genuine one.
Its like a little basket in between with a foam cover. Now isn't the purpose of this so that water may spew out from this valve, or is it when the filter head induces water and is heavier in the vacuum of pull, then the throttle pulls in air from this bypass instead?!

nismo

man, i tried recording my aem cai but the damn rain won't give up and theres too much road noise with rain.
I will try attempt#2

stupid thing is now that i am so addicted to the throaty intake i always wanna rev it to 6000rpm

thedream21479

You're correct on the second point. The valves don't "spew" out the water, it's just pulls in air from the foam cover temporarily. The water just drains out of the filter via gravity.

nismo

But mine doesn't seem to have a flap that would prevent water from coming up continuously, seeing how as the vacuum suck of the air is so strong.

thedream21479

If you look inside the valve, there should be some rubber flaps inside of it. If there is nothing, then it can't really work.

The change in the intake pressure forces the rubber flaps to shut and make a water-tight seal...like I said earlier.

If you have any doubts then just pay the 50 bucks for an AEM- (I would never use a non AEM valve personally- AEM's are tested time and time again)

TeamMidnightinvasion

Actually the opposite is true, you want the bypass valve to be as high as possible on the upper portion of the inlet pipe, so when a pressure drop occurs the bypass is allowed enough time to open. So if the vavle is placed high the bypass will open well before water hits the throttle body.

The bypass opens to allows air in, not to dispurse water. When the bypass valve opens it blocks off the bottom section of the intake with the"flaps", as dream mentioned earlier. As a result, the water that got sucked into the intake will eventually drain out at the bottom of the air filter. It takes a moment for the water to drain back out of the air filter, and thats why your not supposed to keep going WOT when you hit a puddle. Eventually, the water will all drain out of the air filter, pressure will go back to normal, flaps will reopen, and bypass vavle will shut.

Nismo your thoughts seemed very logical, but you just had the wrong facts about a bypass vavle.