I just eliminated the heater passage on my cylinder head breather tube (see picture link).

http://img60.echo.cx/img60/39/elimin...eheater6tf.jpg

Do you think I will have any improvement with this?
Because normally the hot coolant (coming from the engine block) goes through there in order to heat the vapours coming from the head.
I believe this is mainly for low emissions, but it must heat the intake air and detiorate performance.

thanks

 

I believe it's to keep the oily vapors from condensing to liquid in that tube. The heating of intake air is very small, since normally the air flow direction is from the intake towards the valve cover.

 

Thanks

 

Air is inhaled through that tube, not exhaled. It doesn't affect your intake charge at all.

 

If you really want to try and drop your intake air temps, eliminate the entire flow of coolant to the intake manifold (fast idle valve and idle air control valve). It only sucks if you have cold winters (sticking throttle plate).

 

Great advice Servion... We don´t have that cold winters over here. Maybe 5ºC will be very cold already here for winter.
I´ll probably elimante everything then

Thanks!

 

The air goes from the valve cover into the intake. removing it doesn't give you anything. It's pretty lame that ppl still are doing it and think they are getting anything from it.

 

That is backwards. Air is pulled into the valve cover from the intake and then moved into the crankcase and then pushed out the PCV valve and then into the intake manifold. There it burns the oil vapors from the crankcase off.

I removed my hose because the turbo was sucking oil into the compressor wheel through it instead of supplying it air. The pressure differences in the crankcase because of that can attribute to poor ring seal.

 

Air is not "pulled" into the valve cover from the intake tube. You are confused I think.

 

No, you are confused. If you ever look at a flow diagram for the PCV system, it clearly shows that air enters the system through the valve cover. The valve cover is directly connected to the intake tube.