Crank case ventilation

[gerolla]

Hi just a quick question,
should the hose off the cam covers for the crank case vent go before the turbo or after the turbo when venting back into the intake or does it really which way?

thanks

[thechuckster]

before the turbos - you want to evacuate the crank fumes during boost - as that's when you'll generate a lot.

[Cool1]

Woohaa, after the turbo??? DAMMM...

This is baaddd Mkaay?

[gerolla]

O,ok thanks for that. Why is it bad to vent after the turbo? How come on a standard 4age plenum it vents after the throttle?

[RWDboy]

I would go with before the turbo myself

[RWDboy]

4AGE is N/A and hence the intake isn't pressurised (like it would be on a turbo car). Can you imagine a big fat air pump (turbo) working against the crankcase pressure ... ? Just going to pressurise things worse!

[thechuckster]

O,ok thanks for that. Why is it bad to vent after the turbo? How come on a standard 4age plenum it vents after the throttle?

because a 4age doesn't pressurise the inlet manifold.

doh: RWDboy beat me to it

[gerolla]

O,ok that makes perfect sense, Thanks for that

[mullett]

To a catch can

RM.

[gerolla]

Is a catch can legal? Cos the car needs to be blue slipped

[mullett]

No idea actually, paint it black and I don't think it'd be a problem, as long as it's secured well.

RM.