Does anyone have a one on the intake? Do you think it's really necessary because I think it affects the performance of the intake. Maybe more air goes through the bypass valve than the filter.

 

its my understanding that a bypass valve only operates it there is a huge pressure drop from the cai filter. (you dont need one really if you dont have a cai) my theory on how this works is as follows:
intake filter has a lower pressure and resistance than the bypass valve. if this resistance increases the natural path of induction would be the path of less resistance hence the bypass valve. when it kicks in you'll have crap performance but untill then you wont notice it at all

i doubt it'll really do anything in rain, most likely only driving through ponds etc
for $30 i think its worth it. never know when you'll need it.


[Modified by TorteX, 1:39 AM 3/31/2002]

 

look at ebay. i dont think ive ever seen them for $50. ive seen between 30-38 i'll look around and post some links

 

http://www.adventon.com/acb/showprod...tGroup_ID=1353

cheapest ive seen recently

 

They kill sound big time! In my opinion, if you can use a CAI on your car, you can move it inside the car if you suspect trouble. Just cut the pipe in the engine bay, and use a silicon hose to connect it, then if you think it's going to be some real crappy driving just pull into a gas station and move the filter into the engine bay. Most people are just to lazy to do this, so they get the valve. I don't know 100%, but I would suspect that they hinder performance as well, and increase intake air temperature.

 

how would a bypass valve increase temperature. why change your intake setup in pouring rain. if your too concerned w. how your car sounds over saving your motor well then


[Modified by TorteX, 3:00 AM 3/31/2002]

 

It would increase temperature by seperating the lower portion of the intake from the upper, losing continuity between the two and making the intake arm in the car only able to radiate heat underhood. Yes, I would want to save my motor when it rains, so I'd put the intake in my car. When it's not raining, I wouldn't want it to sound weak, and I wouldn't want to have any lost HP, so I wouldn't use a bypass valve. Additionally, bypass valves still allow water to be sucked into your engine, just not dangerous amounts, I would prefer that no dirty water or filter oil make it into my engine after paying a large sum of money for it and building it.

 

if anything aems abv would cool the intake. the aem cai pipes get quite hot, their aluminum, they conduct heat very well. and your still drawing in cold air from the bumper straight through the intake. abv doesnt suck in air unless cai filter is submerged. so its not like your sucking in hot engine bay air unless your swimming w/ some fish. if you prefer not to have any fluid sucked into your motor dont use a cai and dont use filter oil.

 

I'm trying to tell you that there is less mass of aluminium in contact, so there is less material to radiate heat. You have to understand that when you insert the valve, you now have two peices, not one. So ultimately the temperature will rise beyond that of aluminium containing twice the mass and more radiating area.