I was reading about CAI's with bypass valves in a post earlier today. I understand why they are in turbo system's plumbing, but what is the point for a CAI at atmospheric pressure to have a bypass valve?

 

If you're a dope and submerge your car. The CAI won't suck the
water into the engine... instead it'll breath 'in' through the by-
pass valve.

 

1. Peace of mind

2. Way cheaper than a new engine

 

piece of mind? What are you afraid of? How is air at atmospheric pressure going to damage the engine? I assumed the BPV was just used to enhance sound or something.

And in response to the first response, don't you think there are bigger issues than water in your engine if you submerge your car? Besides, it can just go in through the exhasut side.

 

man you got a Blow off vave and a By Pass valve all mixed up...in turbo the sudden closure of the throttle sends back violent air waves back to the turbine and can cause damage....hence why they us a BOV... in a CAI they use a By pass valve in case you drive over a puddle and suck up the water into your engine...!?!!?!

 

In turbo system, a BOV adn BPV are interchangble. BOV's are the "ricy" way to keep a calm air flow in the system after the throttle is closed. A BOV sends excess air behind the throttle into the atmosphere making a cool sound...and unless you are running an aftermarket fuel management system that accounts for the BOV, you will run rich. A BPV reroutes the excess air from the turbo back to the compressor side of the turbo after the throttle is closed so it can be used again. Hence using a BPV is the better way to do it. Why give up that air that the turbo already worked hard to compress?

So if the CAI BPV is to keep the engine safe from water in the intake system, how does it work? In a tubo sytem, the air itself coming back against the difragm or piston is what opens the valve? I'm curious how it works in a CAI. How does it know when to open and vent?

 

A by-pass valve for a CAI keeps water from being sucked into the engine.

Hopefully the link below will help some....Happy reading!!

http://www.sportcompactcarweb.com/ar...h01_0401.shtml

 

this is why:

http://www.acura-tl.com/forum/showth...threadid=43924

 

ahhh...it al makes sense now...thanks for the links.