DS Pump

[verbeekb]

Originally Posted by Wally

Your fear of the notching being different in wet sump as opposed to DS is one of those things I really don't get (part of the 'overthinking')? I mean, you do know where the oil for the V-notches comes from right? How would this ever be different in a DS application? To me this is really one of those 'non-issues'

Hey Walter,

I am not thinking that the notches should be placed differently. I am sorry if I wasn't any clearer earlier.

The thing is, if these notches were deemed necessary by both Porsche and VW in wet sump conditions, then, what kind of piston cooling/wrist pin lubrication do we end up with in a dry sumped type 4? I think that captures it better.

As for windage. I am aware it "eats" energy. So does the cooling fan, so does the transmission oil. The case of Luuk's engine is mildly fishtailed, something that seems beneficial especially with the lager bores. The crankshaft is not modified to reduce windage. In a Porsche 6 the hp gain from fishtailing and knife-edging is assumed to be about 10% (!).

Cheers,

Brian

www.karrera.net