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  1. #1
    Active Member Two Rings
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    Sep 17 2008
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    33147
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    California

    Smaller SC pulley

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    Are all the smaller pulley upgrades using the same size pulley? For example, I noticed the CTS Turbo pulley and belt to be $100 cheaper than the APR. Being I already have a GIAC tune are all the pulleys on the market going to do the same thing if I upgrade to stage 2?

  2. #2
    Established Member Three Rings MSq5's Avatar
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    Feb 14 2017
    AZ Member #
    393251
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    Gulfport, MS

    Most will by 57-57.5 mm or so. That is the equivalent of a 179mm crank pulley. That produces a ratio of about 2.8:1 compared to 2.6:1 stock. That us the standard Stage 2 "single pulley" ratio for such tunes.

    May I suggest going with a solid crank pulley, as there is far greater variety in sizes and ratios. They are easier to install and you can readily swap back to stock or change to higher ratios.

    But, if you do want to go the s/c pulley route, there is no reason to pay APR prices. I cannot vouch specifically for CTS, but there are a lot of pulley vendors out there. Just read the threads to see what others are using and pick a lower priced choice that is reliable.

    Ratios matter, but if you get a pulley that produces a higher ratio than your tune, it will still work, your tune will just bleed off the extra boost.
    2017 Q5 3.0T S-Line | Brilliant Black | EPL Stage 2 93 octane tune | JHM 179mm crank pulley | aFe Pro 5R (part#10-10121) filter in "modified" stock air box | 034 silicone throttle body hose

  3. #3
    Active Member Two Rings
    Join Date
    Sep 17 2008
    AZ Member #
    33147
    Location
    California

    Quote Originally Posted by MSq5 View Post
    Most will by 57-57.5 mm or so. That is the equivalent of a 179mm crank pulley. That produces a ratio of about 2.8:1 compared to 2.6:1 stock. That us the standard Stage 2 "single pulley" ratio for such tunes.

    May I suggest going with a solid crank pulley, as there is far greater variety in sizes and ratios. They are easier to install and you can readily swap back to stock or change to higher ratios.

    But, if you do want to go the s/c pulley route, there is no reason to pay APR prices. I cannot vouch specifically for CTS, but there are a lot of pulley vendors out there. Just read the threads to see what others are using and pick a lower priced choice that is reliable.

    Ratios matter, but if you get a pulley that produces a higher ratio than your tune, it will still work, your tune will just bleed off the extra boost.
    Thanks for the advice. Do they make a crank pulley for the 09 A6?

    Sent from my SM-G960U using Audizine mobile app

  4. #4
    Veteran Member Four Rings SinCityA6's Avatar
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    Jul 17 2011
    AZ Member #
    78357
    My Garage
    '07 Mustang GT Tungsten Grey/Black
    Location
    Sin City, USA

    Smaller SC pulley

    Quote Originally Posted by gabec007 View Post
    Thanks for the advice. Do they make a crank pulley for the 09 A6?

    Sent from my SM-G960U using Audizine mobile app
    Several companies (EPL, Fluidamper, etc.) make one piece lower pulleys. Going this route also eliminates the potential failure of the OEM pulley/balancer/dampener. Had this option been available when I did my stage 2 tune (I have an AWE S/C pulley), I would have gone that route.
    Going to a dual pulley setup will be my next step where the lower pulley will be replaced with a solid unit.


    Sent from my iPhone using Audizine
    '09 C6.5 A6
    M: 3.0t, GIAC/AWE Stg II+, Roc*Euro Intake
    I: Soul Black, CF Trim, LEDs, Paddles, C7 Shifter, Escort 9500i, Blackvue Dashcam
    E: Ibis White, 15% Tint, Smoked Corners, Tinted Tails, S4 Rockers, S6 Blades, RS6 Grill, OEM Splitters (F/R)
    S: H&R Springs/Sways, Koni FSDs, Adams Rotors, Akebono Pads, SS Brake Lines, Paint Matched Calipers, Niche Misano M116 Wheels

  5. #5
    Active Member Two Rings
    Join Date
    Nov 12 2016
    AZ Member #
    385361
    Location
    Finland

    Crank pulley install for the 09 A6 is not easy as S4 and S5. There is motor support below crank pulley A6. You have to modify support for install for example 183mm crank pulley, but it can be done.


  6. #6
    Veteran Member Four Rings SinCityA6's Avatar
    Join Date
    Jul 17 2011
    AZ Member #
    78357
    My Garage
    '07 Mustang GT Tungsten Grey/Black
    Location
    Sin City, USA

    So the snub mount had to be ground down a bit for the pulley to fit?


    Sent from my iPhone using Audizine
    '09 C6.5 A6
    M: 3.0t, GIAC/AWE Stg II+, Roc*Euro Intake
    I: Soul Black, CF Trim, LEDs, Paddles, C7 Shifter, Escort 9500i, Blackvue Dashcam
    E: Ibis White, 15% Tint, Smoked Corners, Tinted Tails, S4 Rockers, S6 Blades, RS6 Grill, OEM Splitters (F/R)
    S: H&R Springs/Sways, Koni FSDs, Adams Rotors, Akebono Pads, SS Brake Lines, Paint Matched Calipers, Niche Misano M116 Wheels

  7. #7
    Active Member Two Rings
    Join Date
    Nov 12 2016
    AZ Member #
    385361
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    Finland

    Yes, little ground down.


  8. #8
    Veteran Member Four Rings SinCityA6's Avatar
    Join Date
    Jul 17 2011
    AZ Member #
    78357
    My Garage
    '07 Mustang GT Tungsten Grey/Black
    Location
    Sin City, USA

    Quote Originally Posted by KimmoL View Post
    Yes, little ground down.

    Good to know. Thank you!


    Sent from my iPhone using Audizine
    '09 C6.5 A6
    M: 3.0t, GIAC/AWE Stg II+, Roc*Euro Intake
    I: Soul Black, CF Trim, LEDs, Paddles, C7 Shifter, Escort 9500i, Blackvue Dashcam
    E: Ibis White, 15% Tint, Smoked Corners, Tinted Tails, S4 Rockers, S6 Blades, RS6 Grill, OEM Splitters (F/R)
    S: H&R Springs/Sways, Koni FSDs, Adams Rotors, Akebono Pads, SS Brake Lines, Paint Matched Calipers, Niche Misano M116 Wheels



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