Porsche Engineers Finally Fix a Major Flaw!
 

Has anyone noticed that the new 991 & 981 engines now feature an Integrated Dry-sump Lubrication system! Long overdue, but better late than never.

You need to look at that again, it is exactly the same wet sump system used on the 986/987 engines......

Yeah, more like a damp-sump.

Unless there is a remote pressurized reservoir, its a wet sump design - despite what the Porsche marketing folks call it.

And by the way, the 986 was also marketed a dry sump design.

I'll take damp over wet.

Too bad they only put the good stuff on the big ticket GT1's.

damp-sump..? that sounds like a Chinese dish, must be lunch time..

.

The best changed they made in the new engine...and yes you guessed it...they did away with the IMS. Anyway, that is what I was told at the Porsche Dealership.:dance:

Allow me to elaborate.
When you browse through the specifications for the 981 & 991 models at the official Porsche website, the following is stated:

Technical Specs - The new Boxster - All Boxster Models - Dr. Ing. h.c. F. Porsche AG

When you do the same for models that are still using the older engine, such as Carrera 4, there is no mention of an Integrated Dry-sump.

So, if this is only marketing mis-information, I got my hopes up for no reason. :rolleyes:

I track my car fairly often, and the most common failure mode with non-Turbo/non-GT3 986/987/996/997 cars on the track is due to oil starvation and not the IMS!

This problem first came up around year 2000 when many owners experienced engine failures on the track due to oil starvation. Porsche shot from the hip with a statement that tracking the new cars would void warranty.

There was huge backlash as a result, and they reluctantly revised their position to say that tracking the new cars with non-DOT tires would void warranty.

Of course, the real fix came in form the hybrid oil/water cooled engines in the turbo and GT3 cars.

With the new models, I was excited that Porsche finally went back to dry-sump lubrication by integrating the oil tank inside the crankcase somehow.

The reservoir (oil tank) need not be pressurized for a true dry-sump configuration. For instance, all air-cooled 911 cars do not sport a pressurized oil tank.

What's needed is an oil reservoir to scavenge the return oil and feed it to the oil pump.

The pressurized setup, like the Accusump, is intended for retrofitting an otherwise wet-sump system to somewhat cure oil starvation.

They did away with the IMS with the MY 2009 engine redesign. :)

They've used this term all the way back from 9x6 generation... this is not news.

For pics of the oil pump and system sign up for our newsletter. I am currently building a 4.2 liter 9A1 based engine from a 3.4 and have over 2,000 pics of the internals.. We have the first performance program for these engines too :-)

BUT wait till you see the tiny chain that drives that 7 thousand dollar oil pump~

There's not much new about the 981 and 991 engines. They're very closely related to the lumps in the 997.2 and 987.2 models.