Rear wing plastic retaining wall
#1
Racer
Thread Starter
Rear wing plastic retaining wall
I noticed my rear wing retaining wall was cracked. Sunset Porsche told me this is one of the most common items ordered for the 993; thats code for "this is one of the biggest pieces of crap quality plastics on this car". $95.00 puts a new on on my door step.
But Im taking a different route. I consulted with my independent wrench (well respected by PCA guys around here) and he advised that: in conjunction with a delete engine cover, there is enough of an abundance of air flow going through the engine bay that should not affect your temperatures. Granted, the retaining wall creates MASSIVE air flow, nobody is denying that. But the retaining wall and rear engine cover also work hand-in-hand by creating a funnel that expels hot air through the apertures of the cover underneath.
Since I never plan to put that engine cover back on, Im going to give it a try without the retaining wall, which also, quite honestly, looks like an accordion musical box got stuck under the wing.
Today I removed it, washed the car and here's how it looks. Im very happy!
But Im taking a different route. I consulted with my independent wrench (well respected by PCA guys around here) and he advised that: in conjunction with a delete engine cover, there is enough of an abundance of air flow going through the engine bay that should not affect your temperatures. Granted, the retaining wall creates MASSIVE air flow, nobody is denying that. But the retaining wall and rear engine cover also work hand-in-hand by creating a funnel that expels hot air through the apertures of the cover underneath.
Since I never plan to put that engine cover back on, Im going to give it a try without the retaining wall, which also, quite honestly, looks like an accordion musical box got stuck under the wing.
Today I removed it, washed the car and here's how it looks. Im very happy!
#2
Burning Brakes
It would be interesting to see some temperature data logging with/without the accordian in the back.
I almost went that route when mine fell apart, but figured the spoiler wall would provide both cooling and increase the high pressure area over the back of the car and thus lower the cars inherently bad coefficient of lift (as was intended).
I have 0 data to support either claim, but I am sure Porsche did a little bit of testing before going with it.
I almost went that route when mine fell apart, but figured the spoiler wall would provide both cooling and increase the high pressure area over the back of the car and thus lower the cars inherently bad coefficient of lift (as was intended).
I have 0 data to support either claim, but I am sure Porsche did a little bit of testing before going with it.
#3
Seared
Rennlist Member
Rennlist Member
I've read where people claim the wall acts to drive air to the fan and to the intake.
I've also read where people claim that the plastic wall was merely added for cosmetic reasons, so the wing (when deployed) is visually tied to the engine lid.
Whatever the reason for its existence, I'd replace it if I were you. Takes all of 5 minutes.
Andreas
#6
Racer
Thread Starter
Dave, what I meant by engine cover was the bottom plastic tray.
Andreas, you are probably right, its sound advice to simply replace it. I may just go ahead and do that.
Andreas, you are probably right, its sound advice to simply replace it. I may just go ahead and do that.
#7
Burning Brakes
Mine was a bit of a PITA to replace... in theory I think they are supposed to ust snap in/out but I had a heck of a time getting my old one out AND the new one in. I butchered the old one before it finally unclipped.
The advice here is sound, its better to just replace it. BUT if you happen to have a remote thermometer (like a digital oven thermometer) and want to take some engine compartment temps I am sure everyone here would find it interesting!
The advice here is sound, its better to just replace it. BUT if you happen to have a remote thermometer (like a digital oven thermometer) and want to take some engine compartment temps I am sure everyone here would find it interesting!
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#8
Rennlist Member
I bought an M10 x 1.00 bolt that I drilled and then bonded a K-type thermocouple in for cylinder head temperature measuring purposes, but I couldn't find that bolt hole that I previously spotted.
If someone can refresh my memory as to where I saw that bolt hole, that would be great.
My plan is to data log both ambient and CHT under varying loads, with and without the engine tray and with the spoiler up and down. I have access to a nice new Graphtec GL900 8 channel data logger for that purpose.
#9
Burning Brakes
What's the catalogue name for this part - or the part number. I couldn't find it under 'retaining wall' and mine is cracked too - maybe ill fix it over the winter.
Thanks.
Thanks.
#12
Instructor
You might want to check the price at from Sonnen Porsche's online site as well. Their prices are usually pretty close to Sunset's prices. I have bought parts from both places and been satisfied with both of them.
http://www.porscheoemparts.com/parts...&siteid=215405
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http://www.porscheoemparts.com/parts...&siteid=215405
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#14
Race Car
What do Porsche engineers know about? I'm sure it was put there for no reason whatsoever... ( tongue in cheek)
Go ahead and replace it. It was put there for a reason.
Go ahead and replace it. It was put there for a reason.
#15
You might want to check the price at from Sonnen Porsche's online site as well. Their prices are usually pretty close to Sunset's prices. I have bought parts from both places and been satisfied with both of them.
http://www.porscheoemparts.com/parts...&siteid=215405
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http://www.porscheoemparts.com/parts...&siteid=215405
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