You clean the underside? I just about manage to clean its bottom (visible bit of the defuser) which does get very dirty.
Concours Competition next?
Concours Competition next?
718 GT4 Aero
- Thread starter ralphmusic
- Start date
BTW Nick, have you found any adjustable aero parts as were fired to the old GT4?
It sounds as though it could be a bit of 'wind tunnel trimming' Nick, maybe to modify the boundary layer locally?
Felt-like material is often applied to the wheel arches as acoustic treatment [something Porsche would do well to adopt for the inadequately-treated rear wheel arches on their sports cars], but I can't think that what you describe is acoustic-related, but who knows?
Ralph, maybe I've missed it but with all the additional rear ducting, does the 718 still have the adjustable rear spoiler and removable panels which were on the 981?
Jeff
Felt-like material is often applied to the wheel arches as acoustic treatment [something Porsche would do well to adopt for the inadequately-treated rear wheel arches on their sports cars], but I can't think that what you describe is acoustic-related, but who knows?
Ralph, maybe I've missed it but with all the additional rear ducting, does the 718 still have the adjustable rear spoiler and removable panels which were on the 981?
Jeff
Jeff,
There are those on a certain forum who keep saying it does but have yet to evidence that claim. I haven't found any adjustability although I confess I lust after a swan neck rear wing (not sure how big the front splitter would have to be to balance it) [8|]
Ralph
There are those on a certain forum who keep saying it does but have yet to evidence that claim. I haven't found any adjustability although I confess I lust after a swan neck rear wing (not sure how big the front splitter would have to be to balance it) [8|]
Ralph
Ralph,
Presumably there would be an indication in the Driver's Manual if the aero is trimmable?
With the significant additional downforce available from the rear diffuser I'm not sure that much could be gained. I wouldn't be surprised if the GT chaps investigated the possibility and decided that any gains were insignificant from a cost-benefit standpoint.
Jeff
Presumably there would be an indication in the Driver's Manual if the aero is trimmable?
With the significant additional downforce available from the rear diffuser I'm not sure that much could be gained. I wouldn't be surprised if the GT chaps investigated the possibility and decided that any gains were insignificant from a cost-benefit standpoint.
Jeff
Here's an odd observation, when cleaning the underside of the car I noticed that part of the aero is covered in a felt like material.
Initially I thought a plastic panel was missing but when I checked another GT4 it was the same. The aero panel in question is the floor pan behind the doors.
Really strange as it going to get really messy but I'm sure it's designed that way.
Initially I thought a plastic panel was missing but when I checked another GT4 it was the same. The aero panel in question is the floor pan behind the doors.
Really strange as it going to get really messy but I'm sure it's designed that way.
A poster on PH alluded to a Track Driving section of the manual and had pics of removable plastic aero at the front. I need to check my manual which I'll do shortly. The rear wing on my car doesn't have any adjustment that I can see, therefore I'm thinking the 718 doesn't have the user based aero tweaks the 981 had...
Twinfan said:
The 981 plastic aero parts are Air Guides #981.575.131.80/132.80 the absence of which apparently has the same function as the black ducting at the front of the 718 front wheels. Mind you looking at the PET file it is not obvious how the 981 rear wing was adjusted.
ralphmusic said:
Not sure Ralph, but I would think that there must be either alternative fixing points or some sort of adjustability in the body structure for the two supports, since it doesn't look as though there's any adjustability at the wing-to-support interface.
It's not clear to me what function item 35: driving mechanism (complete) fulfills. Since it's included in the rear spoiler assembly diagram, presumably the wing's attached to it?
Jeff
Well found, I assume you got the manual with your car?
] [
Twinfan said:
If I knew what everything was... anyway I'll have a root around at the weekend and if I find the manual I'll see if I can make the changes.
Apologies if you have already seen it, but Carfections review of the GT4 and Spyder with Andreas Preuninger, the Head of GT cars at Porsche reveals some interesting aero and downforce facts.
https://youtu.be/qqW-cQPL6tE
https://youtu.be/qqW-cQPL6tE
I'm intrigued to know:
a) Why it's Not for Australia. Being upside down I would have thought that some additional downforce would be beneficial!
b) Why both measures are required "to prevent the centre of gravity being shifted towards the rear or the front". A misprint surely - centre of pressure more likely, unless those inserts are made of depleted uranium?
Jeff
a) Why it's Not for Australia. Being upside down I would have thought that some additional downforce would be beneficial!
b) Why both measures are required "to prevent the centre of gravity being shifted towards the rear or the front". A misprint surely - centre of pressure more likely, unless those inserts are made of depleted uranium?
Jeff
That is a good spot, at 11:20 he talks of the front and rear adjustable options.
OK, so with the car I got:
718 Cayman GT4 and 718 Spyder - Driver's Manual (WKD 982 03 20 20, 11/2019)
Guarantee and Maintenance booklet (WKD 905 01 20 20, 06/2019)
Radio Equipment booklet (WKD 951 600 20, 11/2019)
718 Cayman GT4 Drivingon the race circuit booklet (WKD 982 04 20 20, 06/2019)
Then later in the post I received paperwork for Porsche Assistance including:
Porsche Assistance - Service Description booklet (POR007 [12/18])
718 Cayman GT4 and 718 Spyder - Driver's Manual (WKD 982 03 20 20, 11/2019)
Guarantee and Maintenance booklet (WKD 905 01 20 20, 06/2019)
Radio Equipment booklet (WKD 951 600 20, 11/2019)
718 Cayman GT4 Drivingon the race circuit booklet (WKD 982 04 20 20, 06/2019)
Then later in the post I received paperwork for Porsche Assistance including:
Porsche Assistance - Service Description booklet (POR007 [12/18])
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