Breather systems

[chrisg]

All

I'm just in the middle of a head gasket replacement. The inlet tract(s) have a noticeable amount of oil in them, this is either from blow by (old turbo) and/or a combination through the crankcase breather.

Has anyone got experience of changing to a piper/ Promax breather system ?

thanks

C

 

[944turboS]

I think John Sims has done this & am certain Fen will have on his "Track Slag"

 

[Diver944]

I saw this tonight on Fens track slag at the Goldtrack track evening at Silverstone. The Promax tank is very shiny [8D] but is pretty large and people have struggled to find a place to mount it. Fen has used his PAS bracket because he has a manual steering rack, other have used the inside of the n/s front wheel arch liner on the

 

[Guest]

I have the lindsey breather (which is the same as the promax one, except I have the one which fits to the cam cover).

Honestly, get yourself a universal tank off of ebay for a lot less, and basically stick it inline from the AOS tank to the air inlet (as standard routing). The promax and LR kits are non-recirculating types, which means that although you don't get the blow-back of oil, you also can't build crankcase pressure (which apparently these cars like, but don't ask me why, I just read it!) With an inline tank, you get both the oil being trapped in the tank (and not flowing around), AND keep pressure. (and you can mount it relatively nicely around the airbox/radiator area)

Having said that, I don't have any major issues with mine. I have noticed that you have to be quite careful with the oil level. A little too much, and you get a shed load blow into the tank, which then can leak out of the filter and go everywhere in the engine bay (not good if it's located above a hot exhaust manifold...... good job I carry an extinguisher to learn that one, and what a time to find out, just before a 1000 mile trip from Sweden to UK!), and of course too low an oil level, and you start blowing bearings. Once you get the hang of it, it's OK, and there is quite a wide range from too low to too high, you just need to monitor it once a month.

 

[944Turbo]

I have a compressor air filter fluid separator I have been meaning to find time to mount in line in the breather, IIRC it was less than £20 but I haven't sorted the pipe and fittings yet, a few rennlist guys use them.
My main interest is because the metal pipe under the inlet manifold that is part of the breather system can corrode and fill with carbon stuff, this then exits through a rubber pipe into the J boot right by the turbo intake. I would imagine scale / carbon hitting a high revving turbo could be messy.

Tony

edited cos my holiday hasn't imprroved my spellig