Breathers? Not sure where/what to add.
Turbo Mini Forums

Building up my 998 engine and realizing that I don't have any breathers on it left since I'm not use the rear tappet chest breather (due to turbo) and I'm not using the timing case breather because of a belt drive setup.

Do I need to add some breathers? Where/how should I add them?

You could put one on the transfer case, one on the rocker cover & if you are using mapped ignition use the dizzy hole as another.

If something is worth doing, it's worth doing half of.

Is there any reasoning for determining how many are needed? I don't want to go overboard with it

Too many is better than too few. The a series does like breathers

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Thanks for the info. I think I'll have to add a breather to the flywheel case and the rocker cover. Could I also just use a catch can instead?

I'm using Rear tappet, rocker cover & clutch cover

Is there clearance for the turbo and the tappet breather? I didn't think there would be.

I wont be running a turbo but depends if your using the canstier type or the early pipe type if its the pipe type then it will clear

with a supercharger is it better to put the carter air before the supercharger? This is a blow through set up.

Definitely before, you dont want pressurised air going into your crankcase. Putting it before will help draw out all of the blow by and oil mist

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