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Hi guys,

I'm running a 173 red six with a bit of a blowby problem and am thinking of fitting a fully closed PCV system to recover a bit of economy as reringing the pistols is a little out of my experience/price range for the moment. I've only got one point on the inlet manifold to plumb on a PCV tube, but this is currently taken by my brake booster. Is it safe to create a T-junction and have both the PCV and brake booster connecting at the same point? Just a little concerned any air leak in the rocker cover is going to effect my brake performance...

EDIT: Also, is there any particular reason to go a fully closed system rather than a partially closed one? The partially closed one would only involve the valve, the tubes and a oil filter rocker cover cap rather than a new rocker cover and air filter (and be much easier to put in too!).

Cheers,
James

If you are having ring blowby to a point that your compression pressure is low then you are not going to increase economy by installing a closed PCV system.

Some of your bang -for-buck is slipping past your rings at spark ignition into the sump and blowing pressure and oil mist/fumes out of the engine via, I imagine, the current open breather cap you have and probably leaking gaskets/seals ??.

Installing a PCV system routes that oil/mist into the cylinders to be burn't and ventilates the engine internally at the same time.Still won't solve your blowby problem but may temporarely
clean up the external oil soaked engine you probably have because of blowby.

Installing a T piece shouldn't affect the brake booster I feel as manifold vacuum should be the same whether its shared from one point or sourced from multiple points.

Re-ringing "pistols" ( pistons ) won't necesarily solve the problem either especially if the bores and pistons are worn as well.You will be wasting time and money.

A picture of a working PCV system is easier to describe than words so if anybody has some they can throw up it would make it easier for you to understand how to do it.

Hope that's of some help.