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Old 09-19-2018, 02:59 AM
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inverterman
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Default 991.2 GT3RS Aero

I finally got around to putting the car on the lift and found that the rear bumper vents are purely atheistic and non functional. Wouldn't make sense to open it up the inner fender liner with a Dremel?
Old 09-19-2018, 04:35 AM
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Are you sure that there's no opening towards the side muffler? IMO .1RS has the same thing, wheel's no visible from behind, but vent's still operational.
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Old 09-19-2018, 07:33 AM
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Waxer
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so you would take a Dremel to the body of a $250k car because why???? Oh, your going to make it faster. Of course. How much faster? Send PAG engineers a note.

please don’t do it to that beautiful car.

all of the above said with love.... in a manly way of course. 😎


Old 09-19-2018, 11:33 AM
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FourT6and2
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Hahahahahaahahah

Yes. Please take a Dremel to your car to make the vents "functional."
Old 09-19-2018, 12:32 PM
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inverterman
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You're right. Sawzall would be quicker and much more appropriate.
Old 09-19-2018, 01:02 PM
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inverterman
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Originally Posted by Waxer


so you would take a Dremel to the body of a $250k car because why???? Oh, your going to make it faster. Of course. How much faster? Send PAG engineers a note.

please don’t do it to that beautiful car.

all of the above said with love.... in a manly way of course. 😎


Thanks for keeping it light. On a more serious, non trolling note, it looks to me like the opening in itself isn't doing much for aero and reliving wheel well pressure. The inner wheel well is sealed with plastic and heat shield and the opening itself doesn't appear to have an opening. Perhaps it's there in a smaller form but its absolutely not continuous. This is a street car and I'm ok with aesthetics and will contact PAG to get a better understanding of this detail.
Old 09-19-2018, 01:06 PM
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STG
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It's called COSMETICS
Old 09-19-2018, 01:13 PM
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inverterman
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Originally Posted by STG
It's called COSMETICS
A substance or product used to enhance or alter adding absolutely no function.
Old 09-19-2018, 01:22 PM
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FourT6and2
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Originally Posted by inverterman
A substance or product used to enhance or alter adding absolutely no function.
If you want 100% function, you should be driving an engine bolted to a tubular frame with some raw carbon fiber body panels held together with exposed bolts and zip ties. No leather/Alcantara. Just a bucket seat bolted to the frame. No paint. No cool headlights. No beautiful body lines or design. Basically a big go-cart.
Old 09-19-2018, 04:35 PM
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inverterman
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Originally Posted by FourT6and2
If you want 100% function, you should be driving an engine bolted to a tubular frame with some raw carbon fiber body panels held together with exposed bolts and zip ties. No leather/Alcantara. Just a bucket seat bolted to the frame. No paint. No cool headlights. No beautiful body lines or design. Basically a big go-cart.
Funny. Thanks. I am not looking to add to my collection of race cars or l hacking this street car up. The point of my post has everything to do with Aero and functional designs that contibute to terminal velocity. Take a look at this published data of top speeds of modern GT cars.

Specifications (road cars)CarYears of ProductionTop speed991.1 GT32013-2016315 km/h (196 mph)991.1 GT3 RS2016-2017310 km/h (193 mph)991.2 GT32017-318 km/h (198 mph) (PDK) 320 km/h (199 mph) (manual)991.2 GT3 RS2018-312 km/h (194 mph)
Based upon competition motorsport personal experiences a car of lesser horsepower can reach a similar or better straight line speed by simply reducing drag (Aero). I don't think anyone on this list who races or has raced competitively can tell that opening the vent and relieving wheel pressure will NOT reduce drag. Look at the GT3 RSR it is open behind the rear wheels, a design that we have incorporated in my enduro cars. It's not all about horsepower with respect to top speed.

Automobiles have multiple sources of power dissipation - rolling friction and air drag are the two most important ones. The power these take is a function of velocity - so more power (but a smaller fraction) goes into rolling friction as the car goes faster.

Can some one tell me if the GT2RS rear vent is open and functional?
PengineFairFrollPresistance=f(v,...)=12ρv2A⋅CD=μrFn=(Fair+Froll)v


Old 09-19-2018, 04:47 PM
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It's functional, not cosmetic. They refill it with helium after each service to make the car lighter. Only problem is it leaks out quickly.
Old 09-19-2018, 04:58 PM
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C.J. Ichiban
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You guys realize big fakies are just for looks too right?

Just for looks is ok if looks good enough
Old 09-19-2018, 05:06 PM
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Originally Posted by C.J. Ichiban
You guys realize big fakies are just for looks too right?
WTF



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