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  1. #1
    Established Member Two Rings krism's Avatar
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    RS5 Retractable Spoiler Settings

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    Hey all, I've done some extensive internet research and haven't been able to find anything on this topic so hoping someone out there knows something. Can the retractable spoiler settings be changed? For instance, changing the speed at which it goes up and down, or in my case I want to do some custom work and make it into an air brake. I know it's not practical and/or needed at all but just think it's cool and want a challenge. If the settings can't be changed my other option is to wire it directly to the rear brake lights, if that works...
    2013 Urban Camo []RS5 - Air Lift Performance Suspension - Velocity AP Tune & Catback Exhaust
    instagram @krism84

  2. #2
    Established Member Three Rings
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    Austin TX

    Great question as Id like mine to pop up at say 45mph instead of 77mph. Never seen any info on this either - I know there's a separate Control Module and Control Switch as part of the package when people want to upgrade their S5 trunk to RS5 retractable version so the coding may be in there - still, it seems the Vagcom is capable of a LOT so look forward to finding out more...

  3. #3
    Veteran Member Four Rings ENV²'s Avatar
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    Nov 04 2010
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    2018 Audi S4
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    I was curious about this as well

    Sent from a misfiring cylinder
    2014 RS5 Sepang/White - Akrapovic/Eventuri/034/Eurocode/Bilstein/Euro headlights and tails/Euro mirrors/BLK Wheels/Escort/Blackvue
    2018 Audi S4 (wifemobile) -Navarra Blue/Black Optics/Virtual Cockpit/Carbon inlays -Mods coming soon..

    @FlawlessFinishAuto
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  4. #4
    Veteran Member Four Rings JamesRS5's Avatar
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    I believe the speed signal is pulled off the CAN bus by the spoiler control module so any adjustment may have to be made in the module itself? Maybe someone with electronics skills could figure how the control module interprets the CAN signal to trigger it deploying earlier.
    I know KW suspension DDC taps into the CAN bus next to the spoiler control and it also takes a speed signal to adjust the damping as speed increases.

    I’m not sure how long the spoiler motor would last if you wired it up to the brake lights, driving in traffic would shorten its life dramatically.
    You’re right about practicality, putting on my aircraft engineering hat, the rear spoiler isn’t an air brake nor would it have any braking effect in its current configuration, you’d have to alter its deployment angle to have any type of drag effect and that sounds like an awful lot of work for very little result, putting your head out of the window would have the same braking effect.
    I accept a Stage II tuned S5 is quicker than an RS5
    Doug convinced me
    He's also the reason I don't come here much

  5. #5
    Established Member Three Rings
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    Quote Originally Posted by JamesRS5 View Post
    the rear spoiler isn’t an air brake nor would it have any braking effect in its current configuration, you’d have to alter its deployment angle to have any type of drag effect and that sounds like an awful lot of work for very little result, putting your head out of the window would have the same braking effect.
    I LOL'd :) I just want mine to deploy above 45mph so it gets used more often as the car simply looks better with it up and the up/down in motion looks cool and reminds me of 911 Carrera's...

  6. #6
    Veteran Member Four Rings ENV²'s Avatar
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    Quote Originally Posted by AsherAudi View Post
    I LOL'd :) I just want mine to deploy above 45mph so it gets used more often as the car simply looks better with it up and the up/down in motion looks cool and reminds me of 911 Carrera's...
    ѕαmє hєrє, juѕt wαntєd tσ uѕє ít mσrє.

    Sent from a misfiring cylinder
    2014 RS5 Sepang/White - Akrapovic/Eventuri/034/Eurocode/Bilstein/Euro headlights and tails/Euro mirrors/BLK Wheels/Escort/Blackvue
    2018 Audi S4 (wifemobile) -Navarra Blue/Black Optics/Virtual Cockpit/Carbon inlays -Mods coming soon..

    @FlawlessFinishAuto
    @Driven_Not_Hidden

  7. #7
    Established Member Two Rings krism's Avatar
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    Quote Originally Posted by JamesRS5 View Post
    I believe the speed signal is pulled off the CAN bus by the spoiler control module so any adjustment may have to be made in the module itself? Maybe someone with electronics skills could figure how the control module interprets the CAN signal to trigger it deploying earlier.
    I know KW suspension DDC taps into the CAN bus next to the spoiler control and it also takes a speed signal to adjust the damping as speed increases.

    I’m not sure how long the spoiler motor would last if you wired it up to the brake lights, driving in traffic would shorten its life dramatically.
    You’re right about practicality, putting on my aircraft engineering hat, the rear spoiler isn’t an air brake nor would it have any braking effect in its current configuration, you’d have to alter its deployment angle to have any type of drag effect and that sounds like an awful lot of work for very little result, putting your head out of the window would have the same braking effect.
    Spoiler alert (pun intended), I'm actually getting an aftermarket CF wing that I'll custom fab brackets for. So it'll be able to rotate and go basically vertical which should actually have some impact on braking. However you're right the motor would burn out pretty quick, so I have 2 ideas on how to avoid this.

    There's emergency braking where the lights flash under hard braking, could possibly tap into this.

    Second idea is still tying into the rear lights but adding an on/off switch so the 'air brake' only activates when I have the whole system turned on.
    2013 Urban Camo []RS5 - Air Lift Performance Suspension - Velocity AP Tune & Catback Exhaust
    instagram @krism84

  8. #8
    Established Member Two Rings
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    May 15 2018
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    418843

    Anyone know if you can set a lower speed the spoiler retracts at? I assume same issues with setting the upper limit.

    Did the speed it deploys at vary by year? My 2015 seems to deploy at 70. I’m good with this upper limit as to be honest, not hard to hit when driving the rs5 but would like to see it retract at maybe 25-30 mph.

  9. #9
    Established Member Two Rings krism's Avatar
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    Oct 17 2017
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    Edmonton, AB

    I haven't found any info on this anywhere... from the R8 forum I found they can turn it on/off completely but no speed adjustment. I just got a VAGCOM so maybe when I have time over the holidays I'll play around and see if I can dig into the settings
    2013 Urban Camo []RS5 - Air Lift Performance Suspension - Velocity AP Tune & Catback Exhaust
    instagram @krism84

  10. #10
    Veteran Member Four Rings JamesRS5's Avatar
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    Quote Originally Posted by krism View Post
    Spoiler alert (pun intended), I'm actually getting an aftermarket CF wing that I'll custom fab brackets for. So it'll be able to rotate and go basically vertical which should actually have some impact on braking
    It’s a nice project and will look fun to see it operate but with the weight of an RS5 and the size of the spoiler it won’t have much braking effect, also, attempting to drive the spoiler to a vertical position when it’s aerodynamically loaded could be a problem for the actuator?

    Increasing the spoiler pitch angle during braking to increase downforce maybe more useful than attempting an airbrake.
    I accept a Stage II tuned S5 is quicker than an RS5
    Doug convinced me
    He's also the reason I don't come here much

  11. #11
    Established Member Two Rings krism's Avatar
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    Oct 17 2017
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    2013 RS5
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    Edmonton, AB

    Quote Originally Posted by JamesRS5 View Post
    It’s a nice project and will look fun to see it operate but with the weight of an RS5 and the size of the spoiler it won’t have much braking effect, also, attempting to drive the spoiler to a vertical position when it’s aerodynamically loaded could be a problem for the actuator?

    Increasing the spoiler pitch angle during braking to increase downforce maybe more useful than attempting an airbrake.
    Ya I'll have to do some calculations, I'm still in the development stage of this whole project. I'm actually a mechanical engineer and have done post-grad courses in aerodynamics and supersonic flow (maybe one day I'll have a car that fast lol). Unfortunately I don't have any CFD programs but I can do some rough calculations and at least come up with some stress calculations.

    I was actually thinking of having a 2-stage 'lift' if it's possible, first would be to increase the angle just like stock, second would be air brake position. We'll see how this project turns out lol
    2013 Urban Camo []RS5 - Air Lift Performance Suspension - Velocity AP Tune & Catback Exhaust
    instagram @krism84

  12. #12
    Veteran Member Four Rings JamesRS5's Avatar
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    Personally I’d like to see a wind tunnel test on the A5 body shape before investing and time or effort, air usually separates from the body at the top of the rear window and become turbulent by the trunk lid, this can cause drag by creating a low pressure behind the car, my belief is the RS5 spoiler sole purpose is to reduce this drag by cleaning up the air and reducing the low pressure so reducing drag. This is another reason the airbrake may not be so effective, you’d have to lift it pretty high to get clean air, you could fit Evo style vortex generators to the rear window roof line to make the air stick to the body but be very wary of this, you’ve now make the air stick to what is basically a big wing shape as the air flows over the front screen, roof and rear screen so you’ve just created lift!! Oh and if you ever fit vortex generators to an RS5 I’m pretty sure it’s an instant ban from this forum and a severe reprimand from the style police.

    Lots to think about on this project
    I accept a Stage II tuned S5 is quicker than an RS5
    Doug convinced me
    He's also the reason I don't come here much

  13. #13
    Established Member Two Rings krism's Avatar
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    Oct 17 2017
    AZ Member #
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    My Garage
    2013 RS5
    Location
    Edmonton, AB

    To be honest for me this is more about aesthetics than performance, and doing something a bit different and what I think is cool. I know there will be haters but I've learned enough in my age not to care lol
    2013 Urban Camo []RS5 - Air Lift Performance Suspension - Velocity AP Tune & Catback Exhaust
    instagram @krism84

  14. #14
    Veteran Member Four Rings jdmnomore's Avatar
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    On a completely separate note.. but since I saw it mentioned. What constitutes emergency braking? Like what would actually prompt the lights to flash under braking. I remember activating that via vagcom but not sure if it's ever worked.

    Sorry for to go off topic lol

  15. #15
    Established Member Two Rings krism's Avatar
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    Quote Originally Posted by jdmnomore View Post
    On a completely separate note.. but since I saw it mentioned. What constitutes emergency braking? Like what would actually prompt the lights to flash under braking. I remember activating that via vagcom but not sure if it's ever worked.

    Sorry for to go off topic lol
    I'm not exactly sure either, the little information I've found is that it only works at highway speeds
    2013 Urban Camo []RS5 - Air Lift Performance Suspension - Velocity AP Tune & Catback Exhaust
    instagram @krism84

  16. #16
    Veteran Member Four Rings JamesRS5's Avatar
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    Quote Originally Posted by jdmnomore View Post
    On a completely separate note.. but since I saw it mentioned. What constitutes emergency braking? Like what would actually prompt the lights to flash under braking. I remember activating that via vagcom but not sure if it's ever worked.

    Sorry for to go off topic lol
    Come off the gas and hard on the brakes very quickly.

    I accept a Stage II tuned S5 is quicker than an RS5
    Doug convinced me
    He's also the reason I don't come here much



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