ive heard some variations on this. is this bad to run a breather on the valve cover because of the vapors being trapped in? can i juts run a hose from the valve cover to vent out somewhere?

 

??

 

The hose should run to the turbo's intake pipe.

 

problem. i have a fmax kit,. there is no bung for the hose to slide into like the air intakes. instead there are 2 buings being taken up by my 2 lucas 440 injectors. i heard it wasnt good to have a breather on there because of blowby and other gases.

 

I would just put a filter there.

 

anyone else?

 

You can filter it, but technically it should be on the turbo's intake pipe. Now the pipe you are talking about, which has two bungs for injectors is a charge pipe, not an intake pipe.

If you want to do it the right way, weld a little stub of tube onto the intake (the pipe with the filter on it) and be done. Otherwise, throw a filter on there like me and everybody else

 

word up mplex2000 , BUT if you are ultra lazy, then go to pep boys and grab a breather + =

 

Hook a hose up to it. Let the blow by gases shoot down

 

just out of curiousity, would not having anything there effect startup and idle?

 

an FMAX kit shoulld come with a short pipe with a vacuum hose bung welded to it. this pipe goes in between the air filter and the intake tube.

 

I have the FMAX kit and although the kit came with a nipple before the compressor and after the filter, I couldnt use it (no room filter is on the turbo).

I took a 3/8" fuel hose and routed it to a minifilter.

 

by connecting it to your intake pipe will more then likely get oil in it. i just put a baby breather on it....i pulled it every 3 weeks or so and checked for oil...sure enough i had to change it every 2 months....was collecting oil

 

The valve cover should be baffeled beneath it's nipple though, so unless there's something wrong there should be minimal oil coming from there - mainly vapor.

Honestly, it doesn't seem to matter however you do it, BUT - the crankcase was designed for positive ventiliation, which means Honda intended for the vapors to be sucked out rather than relying on the crankcase pressure to relieve itself.

Ahhh...I think I will positively relieve myself now

 

Yeah that is true, but I do not think there is a problem using a filter or hose to route the vapors. I know it can be illegal for emmisions reasons in some states.

 

well theres a hose on mine now to reroute the gases

 

the purpose of the valve cover breather is TO PUSH THE BLOW BY GASSES DOWN. the direction of the air flow is out from the valve cover to inside of the valve cover...

you should not have any oil on the intake pipe, unless you have Blow by..

 

I dont have a filter because it makes a mess..i just run a tube down to the bottom of the engine and dump. Routing it back into the intake is good..but you end up getting alot of oil in the piping and in the intercooler. (you should see my eclipse's sidemount)

liam

 

How does connecting it to the intake force air into the valve cover if the intake is a vacuum source ?

 

the intake, pre throttle body is not a vacuum source. the manifold, however, is. that is why the pcv valve is connection to the manifold and opens under vacuum. the vacuum sucks the crankcase vapors out and the valve cover breather/tube whatever lets fresh air in.

 

I can't see how it's not a vacuum source if it's sucking air into the filter...

 

the vacuum source is the intake manifold. air is going in there because there is vacuum later on in the system. air flows to where there is less pressure