Cupcar

Interesting the patent only seems to cover using under car paneling to cool various parts of drive train. I figure it was mostly for air cooled noise and the cooling was a second derivative.

Duggie

I leave mine off purely because its easier and quicker to get a trolley jack under the engine casing to jack the car up. I think, as others have said, the trays were fitted by Porsche for reducing noise.

Greg Lab

Judging from the scrapes on mine, it is obviously offering some protection, and I consider myself a careful driver over dips and steep driveways... Heater hoses are $150 each, and the flapper box is approx. $100 on Ebay used. Hate to rip all that stuff off in a steep dip incident...

Cupcar

FWIW, to add to the data of use, mine was off car when I bought it and will remain off.

JasonAndreas

All of the 964RS and Turbos and (some of the CupCars) ran them, including at Leman's. Its a safe bet that the 993RS as-delivered by the factory came with them too...

It was only the 45 964 Cups that Andial got their hands that were delivered without the tray.

I found the more recent thermocoupled 993 test

pegdrag

I donated mine to Steve Weiner the last time I was up in Portland. He might have mentioned something about using it for testing a "high speed ground effect stabilized stationary air conditioning tower".

I am sure that Rheem is planning a new line of ground effect stabilized AC towers and there will be HUGE market for the old trays.

Mike J

interesting,the only way to really tell is to instrument the engine and run it, as well as idle in traffic, and most importantly for me, SHUT OFF the engine and let is sit there and cook, and see how the temperature spike.

I see there are threads with guys reading the temps off the engine with and without the cover, but not sure how they do that since the parts you need to read from are covered with the cover --

Funny, I have not seen covers on the 996's or 997's - why is that? Have not been under a 991 yet...

Cheers,

Mike

RS man

As an owner of one, mine still has the cover

Cupcar

Actually, I can ring in here since I bought one of the USA Cup cars new and it was delivered WITH the tray.

Ed Hughes

This has come up on other threads, and needs to be said again-Porsche engineers aren't perfect when it comes to looking down the road a number of years as to what may bite them in the ***. So, whether it was noise, aero or whatever, there COULD be long term side effects from having the cover in place. The heat soak Mike mentions above is the first thing that came to my mind, and why mine is safely in the attic.

vincer77

Lift always induces drag. There are no free lunches.

Dr. No

Am I being unfair, or should anyone who starts a new thread on engine trays should be beaten with one?

nile13

No, you are very fair. We need to have several trays strategically located around the country for that purpose.

IXLR8

With 300,000 miles on his engine, what we really need to do is find out what material Richard's valve guides are made from.

96PCarrera993mg

^^^Excellent thread.