Supercharged 928 - Need advice

[carrerachimaera]

Just got myself a supercharged 928S2 Man Strosek.Head gaskets needed replacing day 2 of ownership.Done by Paul Anderson in Stroud (£1300).Car now drives very well but is spewing its oil out through a filter on top of the oil filler.I think there use to be a breather or return tube where the filter is now positioned.The tube was removed as part of the Supercharger install (don't know why though).My questions are 1)Why is it blowing oil out through the breather filter? and 2)Does anyone know of a 928 skilled mechanic in Essex? Any help would be greatly appreciated please. Colin

[sheepy]

carrerachimaera said:

Just got myself a supercharged 928S2 Man Strosek.

Join the 928 owners list (www.928.ork.uk) and ask on there. Plenty of knowledgeable folks about.

[cheburator]

carrerachimaera said:

Just got myself a supercharged 928S2 Man Strosek.Head gaskets needed replacing day 2 of ownership.Done by Paul Anderson in Stroud (£1300).Car now drives very well but is spewing its oil out through a filter on top of the oil filler.I think there use to be a breather or return tube where the filter is now positioned.The tube was removed as part of the Supercharger install (don't know why though).My questions are 1)Why is it blowing oil out through the breather filter? and 2)Does anyone know of a 928 skilled mechanic in Essex? Any help would be greatly appreciated please. Colin

Nice car! Nearly bought it myself, but could not justify a third 928 to SWMBO

1. You are pressurizing the crank case. The 16v engines whip oil into the breather system at high rpm anyway as the tube from the filler to the sump is straight. When you introduce boost you need to modify the breather system - a catch tank and either vent to the atmosphere or back into the intake. [url]www.928motorsports.com[/url] can help with their system. Call them and speak to Carl - he is a great guy and very helpfull.

2. JM Autos are no longer! Thanks God for that. I would try JZMachtech or Paul A. Loe Bank up North are also excellent. Drop me an email if you need help with anything.

The 928 forum on Rennlist is your best technical resource.

Hope that helps,

Alex

[carrerachimaera]

Thank you - Just gone and joined up.

[rubystone]

In Essex, try Alan Rouse/Ken Campion at Autostrasse 01376 562922. they always seem to have plenty of 928s in there for the last rites

[carrerachimaera]

Many thanks Cheburator and Rubystone.Just as an up date; I fitted a half inch tube to the breather outlet and held it aloft.Oil vapour came out at a steady rate (not pulsing as it might if I had a dodgy piston ring).I can now see that it is a mist vapour as opposed to liquid oil pouring out.Obviously, when I had placed the end into an open container the vapour condensed back to liquid.This is why I initialy thought I had neat oil coming through the breather.I'm looking at fitting a catch tank with a return to the sump and breather to inlet tract.I will look at site you recommended.Many thanks - Colin

[cheburator]

Nice one! It would be great if you can come along to one of the 928 meets and show us the car once it is all sorted. Good Luck!