crankshaft oiling
09-01-2008, 08:40 PM
#1
Rennlist Member
Thread Starter
crankshaft oiling
Hello All
While looking through the archives I found this interesting article posted by Nicole a few years ago , on the German forum how one of its own was supplying modification to the lower engine cradle oiling galleries for about $400 .
"I came across an interesting discussion on the German PFF board about oil starvation. It started with someone wanting to install single throttle injection for each cylinder, and veered off into oiling issues and that these prevented Porsche to ever use the 928 for racing.
One guy reports oil pressure dropping in fast Autobahn curves - it requires to press the clutch and get off the throttle immediately, he says, then he has to wait a moment, before getting back on it.
Someone says that GTS crankshafts are getting rare becaue for the rod bearing 2 and 6 failures.
Another - Uli from urbo Technik Piez - says that cross drilling and accusump would certainly help in turns, but does not completely cure the fundamental problem of oiling all bearings above 6,200 rpm. He does not specify his solution, as it is proprietary. But he offeres to install it in engines delivered to him, without specifying a price... (He supposedly was involved in this one: http://www.t-t-p.de/gallery/index.php?id_rub=4)"
Did anyone follow this up to be any genuine help , I am amazed that the 924 928 951 968 944 have all the same oiling issues , there is hours of discussions on the topic , but seemingly no reason only guesses as to why the failures occur .
Certainly got my interest when I came across the german article , surely someone must have followed this up as it is now 5 years old .
Please share .
While looking through the archives I found this interesting article posted by Nicole a few years ago , on the German forum how one of its own was supplying modification to the lower engine cradle oiling galleries for about $400 .
"I came across an interesting discussion on the German PFF board about oil starvation. It started with someone wanting to install single throttle injection for each cylinder, and veered off into oiling issues and that these prevented Porsche to ever use the 928 for racing.
One guy reports oil pressure dropping in fast Autobahn curves - it requires to press the clutch and get off the throttle immediately, he says, then he has to wait a moment, before getting back on it.
Someone says that GTS crankshafts are getting rare becaue for the rod bearing 2 and 6 failures.
Another - Uli from urbo Technik Piez - says that cross drilling and accusump would certainly help in turns, but does not completely cure the fundamental problem of oiling all bearings above 6,200 rpm. He does not specify his solution, as it is proprietary. But he offeres to install it in engines delivered to him, without specifying a price... (He supposedly was involved in this one: http://www.t-t-p.de/gallery/index.php?id_rub=4)"
Did anyone follow this up to be any genuine help , I am amazed that the 924 928 951 968 944 have all the same oiling issues , there is hours of discussions on the topic , but seemingly no reason only guesses as to why the failures occur .
Certainly got my interest when I came across the german article , surely someone must have followed this up as it is now 5 years old .
Please share .
