Thread: Crankcase Filter Advice

link?

http://www.sr20-forum.com/general-sr20/9334-finding-way-get-rid-oily-blow-gases.html

That's the thread, look it over

I will add.... the hose from the intake also helps pull crankcase pressure under hard acceleration ... PCV valve only works at idle and low throttle, high throttle it does not do much at all, where as the incoming air through the intake will help pull the vapors out ... Crankcase pressure = power loss ....


I have seen up to .2 loss at the 1/4 with a filter vs. having a hose or catch can setup ...

That is very correct. For this reason I have my VC ventilation being sucked in by the turbo, to eliminate pressure.

If you want to get a ball park numbers look at this post:

People's opinions on the crankcase ventilation system is irrelevant. On a Mass air flow metered engine you must keep the PCV valve, hoses, and breather pipes all connected AFTER the MAF sensor. All the combustion blow by gasses is previously metered air and thus it will not affect the runability of the motor. If you want to open the breather vent tube to the atmosphere, then you must also remove the PCV hose from intake manifold. This eliminates the entire crankcase from the intake tract and any modifications will not effect engine runability/driveability.

However, disabling the PCV system does nothing good. Keeping the crankcase vented has many benefits. Yes there are HP gains in this as well. On well modified motors, there are large gains to be had. I myself have seen 20-30whp on DET motors making 500whp.

-Ted

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Well i can guess buy that i'm better taking it off and doing a rolling road test to see... The car stays at high revs all the time, so seems to be a good idea?

Thanks guys, although i'm still a little confused by all the tech talk..

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It is my track car, but i use it on the motorway (freeway) to get there... would it be no good if i got stuck in traffic??

What effect will it have?