No engine tray, huh? Didn't work out so well for me.
06-17-2010, 02:51 PM
#46
Three Wheelin'
06-17-2010, 03:41 PM
#47
Posting this here as well (just to show I did a search). Where do I get the 45mm tall orange hoses that keep the flapper boxes from drooping/dragging on the ground? Mine are totally shredded (speed bump?) and dealer says they are no longer available. Pelican Parts doesn't have either.
06-17-2010, 06:23 PM
#48
Burning Brakes
I am still of the opinion that the tray is smoother than the underside of the engine and will thus keep the airflow under the car more laminar = less lift. Didn't RUF do a test on that a long time ago. Made a few pounds worth of difference at 150mph, which is normal freeway speed here 
I like the idea of cutting some holes out and adding a mesh screen... I think I have a new project for this weekend! I thought about remaking mine out of a thin aluminum sheet and adding a few louvers to direct some of the cool high pressure air out from underneath the car and through the engine compartment. Has anyone done this (or something similiar)? Results?
I like the idea of cutting some holes out and adding a mesh screen... I think I have a new project for this weekend! I thought about remaking mine out of a thin aluminum sheet and adding a few louvers to direct some of the cool high pressure air out from underneath the car and through the engine compartment. Has anyone done this (or something similiar)? Results?
06-17-2010, 07:08 PM
#49
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and i guess there are not that many body-parts (particularly not in that size) that
porsche built in without them making any sense...
but hey, just guessing... 
Last edited by J.A.W.S.; 12-21-2010 at 12:23 PM.
06-17-2010, 10:41 PM
#50
Burning Brakes
According to that air flow diagram I would think the best thing to move air along efficiently would be to put som rather large and ungainly holes in the rear bumper or valence to allow the high pressure air from underneath the car and from the spoiler to exit into the low pressure area behind the bumper...
It seems silly to pull air from the top just to dump it underneath the car, that kinda negates the effect of the spoiler in my opinion.
Back to the original topic... I keep my cover on because I am worried about road debris, gravel etc from tearing up the rather delicate looking aluminum "stuff" on my engine. If I am going somewhere where I will be sitting in traffic or driving slowly I take my Jetta.
It seems silly to pull air from the top just to dump it underneath the car, that kinda negates the effect of the spoiler in my opinion.
Back to the original topic... I keep my cover on because I am worried about road debris, gravel etc from tearing up the rather delicate looking aluminum "stuff" on my engine. If I am going somewhere where I will be sitting in traffic or driving slowly I take my Jetta.
06-18-2010, 12:02 AM
#53
Golly, I'm glad I saved my undertray and have it preserved in plastic wrap in my garage.
Between that and my intact basket handle, I should be in good stead should I ever want to sell my car to a true afficionado.
Between that and my intact basket handle, I should be in good stead should I ever want to sell my car to a true afficionado.
06-18-2010, 08:58 AM
#54
R.I.P
Rennlist Member
Rennlist Member
Engine tray is for noise reduction to meet certain regulations. There is evidence it causes hot spots leading to premature valve guide failure. Race versions of the 993 have no undertray which is a hint.
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06-18-2010, 02:58 PM
#58
Drifting
This man knows how and how MUCH to drive his 993!!! I'm looking forward to watching mine roll 200k mi at some point!
06-18-2010, 03:11 PM
#59
Rennlist Member
According to that air flow diagram I would think the best thing to move air along efficiently would be to put som rather large and ungainly holes in the rear bumper or valence to allow the high pressure air from underneath the car and from the spoiler to exit into the low pressure area behind the bumper...
.
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cheers
Craig
