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  1. #1641
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Guest-only advertisement. Register or Log In now!
    Great results for this RS3 in France! Stock vs APR Stage 1 (98) vs APR Stage 1 (E85)

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    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  2. #1642
    Active Member Two Rings Optimus812's Avatar
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    This is the kit I installed for monitoring E85. http://www.fuel-it.com/vw-audi-flex-fuel-kits/ Comes with the Continental sensor and I use the phone app with bluetooth. Working great so far.
    2018 Catalunya RS3 - APR Stg 1 E85, IE Carbon Intake, Milltek Catted DP, Iroz FMIC

  3. #1643
    Established Member Three Rings
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    Quote Originally Posted by Optimus812 View Post
    This is the kit I installed for monitoring E85. http://www.fuel-it.com/vw-audi-flex-fuel-kits/ Comes with the Continental sensor and I use the phone app with bluetooth. Working great so far.
    Awesome thanks! Was it easy DIY? Did you go with just bluetooth only option? I never messed with fuel line by myself before...


    Sent from my iPhone using Tapatalk

  4. #1644
    Active Member Two Rings Optimus812's Avatar
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    Quote Originally Posted by J_3_f_f View Post
    Awesome thanks! Was it easy DIY? Did you go with just bluetooth only option? I never messed with fuel line by myself before...


    Sent from my iPhone using Tapatalk
    Well, I wouldn't call it an easy DIY, it's not entirely "bolt on". You need to remove part of the stock fuel lines (which wasn't bad) but cutting the new fuel lines and fitting them with those special clamps was a chore. I wish the lines were more custom pre-cut for our RS3, it seems this kit was designed more for a GTI or S3. You then need to wire it to the fuse box and find a ignition switched fuse you can tap into (this wasn't too bad). Not for the novice for sure! Yes, I went with the bluetooth only option.
    2018 Catalunya RS3 - APR Stg 1 E85, IE Carbon Intake, Milltek Catted DP, Iroz FMIC

  5. #1645
    Active Member Two Rings nicholasdaa's Avatar
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    2018 Tahoe Z71, 2014 E30 Stage 3 Big Turbo Ford Focus ST
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    Quote Originally Posted by Optimus812 View Post
    Well, I wouldn't call it an easy DIY, it's not entirely "bolt on". You need to remove part of the stock fuel lines (which wasn't bad) but cutting the new fuel lines and fitting them with those special clamps was a chore. I wish the lines were more custom pre-cut for our RS3, it seems this kit was designed more for a GTI or S3. You then need to wire it to the fuse box and find a ignition switched fuse you can tap into (this wasn't too bad). Not for the novice for sure! Yes, I went with the bluetooth only option.
    Thanks for the recommendation, just ordered mine!
    Current -
    • 2018 Nardo RS3 - Fully Loaded - E85 APR Stage 1, Milltek Catback, Secondary Decat
    • 2018 Black Tahoe Z71
    • 2014 Tuxedo Black Ford Focus ST - E30 Stage 3 Big Turbo

    Past -
    • 2014 Firesand Orange F-Type V8S Convertible

  6. #1646
    Account Terminated Two Rings
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    Here is another APR stage 1 on 91 dynopulls IMG_2738.JPG


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  7. #1647
    Established Member Three Rings
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    Arin, is APR Plus transferable to future owners?

    EDIT: Never mind. I found the details on the APR site. Good to see that the coverage is transferable.
    2018 Audi RS3 - Daytona Gray w/Aluminum Optics, Dynamic & Tech

    - Signature Wheel SV104’s in brushed black tint

  8. #1648
    Established Member Two Rings
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    what if we run E85 on E60 tune, what would happen?

  9. #1649
    Active Member Two Rings
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    Quote Originally Posted by 2017AudiRS3 View Post
    Here is another APR stage 1 on 91 dynopulls IMG_2738.JPG


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    That's actually Stage 1 91 on the top two vs stock on the bottom two.

  10. #1650
    Established Member Two Rings
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    Quote Originally Posted by KelTan View Post
    That's actually Stage 1 91 on the top two vs stock on the bottom two.
    so they did two tuned pulls, then flashed back to stock and did two stock tune pulls? Because thats what the time stamps are saying....
    2018 Nardo RS3 - Stock-ish

  11. #1651
    Veteran Member Four Rings a4000's Avatar
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    Quote Originally Posted by KelTan View Post
    That's actually Stage 1 91 on the top two vs stock on the bottom two.
    Stock looks like about the same power apr was claiming a competitor made on stage 1 just a few weeks ago. How bout that

  12. #1652
    Active Member Two Rings
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    Quote Originally Posted by BenLaz View Post
    so they did two tuned pulls, then flashed back to stock and did two stock tune pulls? Because thats what the time stamps are saying....
    91 tune pulls were first, then changed to the “stock” setting and did the bottom two. It’s part of the program switching.

  13. #1653
    Veteran Member Four Rings saxon's Avatar
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    Quote Originally Posted by a4000 View Post
    Stock looks like about the same power apr was claiming a competitor made on stage 1 just a few weeks ago. How bout that
    🍺🍺🤣🤣
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    Unitronic stage??

    Past cars 2010 s4-2012 Nissan GT-R -2014 S6-2016 s3-2015 M3--2011 b8 s4

  14. #1654
    Veteran Member Four Rings a4000's Avatar
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    Quote Originally Posted by saxon View Post
    🍺🍺🤣🤣
    I know right? It's too easy.

  15. #1655
    Active Member Two Rings nicholasdaa's Avatar
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    2018 Tahoe Z71, 2014 E30 Stage 3 Big Turbo Ford Focus ST
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    Quote Originally Posted by KelTan View Post
    91 tune pulls were first, then changed to the “stock” setting and did the bottom two. It’s part of the program switching.
    I'm getting APR E85 tuned on Monday, what options do you have for maps on the tune? Are they only switchable via the app? Or via CC too?

  16. #1656
    Established Member Two Rings
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    Quote Originally Posted by KelTan View Post
    91 tune pulls were first, then changed to the “stock” setting and did the bottom two. It’s part of the program switching.
    Why go backwards? That doesn't make much sense, unless someone is trying to inflate the delta numbers.... Do the stock ones after some heatsoak sets in so the delta looks bigger... 6 minutes isnt much of a cool down period....
    2018 Nardo RS3 - Stock-ish

  17. #1657
    Active Member Two Rings
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    Quote Originally Posted by BenLaz View Post
    Why go backwards? That doesn't make much sense, unless someone is trying to inflate the delta numbers.... Do the stock ones after some heatsoak sets in so the delta looks bigger... 6 minutes isnt much of a cool down period....
    I don't know, I guess I didn't care to think it through? Had it on the 91 map when I got there, ran that and switched to the stock map. I guess if I had run stock and then 91, the number might not have risen as much, but it would be pretty close. I just wanted a general idea to compare, and then the E85 map when I go back next month. If you think I'm doing this for any personal benefit, you're grasping at straws; I'm simply showing my results from a dyno that will continue to monitor my progress with the car.

  18. #1658
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Quote Originally Posted by s316 View Post
    what if we run E85 on E60 tune, what would happen?
    All good. The Tune is designed for use with fuel from E60 to E85.

    Quote Originally Posted by 2017AudiRS3 View Post
    Here is another APR stage 1 on 91 dynopulls

    IMG_2738.JPG
    Very nice. That's more HP than we advertised at the wheels and crank (crank is listed in the table at the bottom).

    Quote Originally Posted by nicholasdaa View Post
    I'm getting APR E85 tuned on Monday, what options do you have for maps on the tune? Are they only switchable via the app? Or via CC too?
    You can use our mobile dongle, or the cruise control stalk.

    You can choose four programs: Stock, 91, 93, 100, 104 or E85.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  19. #1659
    Established Member Two Rings
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    2018 RS3, 2003 GTI VRT
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    Alright, spill the beans. Is this for the RS3?

    flickr | Instagram | 2003 GTI VRT | 2018 TTRS
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  20. #1660
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Not that you can tell there, but the RS3 unit is dramatically larger. ;)
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  21. #1661
    Established Member Two Rings
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    Can E20 or E30 be used with your stage 1 tune (not E85 tune)?

  22. #1662
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    E20, probably. You don't want to max out the fuel trims.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  23. #1663
    Senior Member Three Rings
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    So what is the proper process in terms of properly seitching tunes, if I'm running stage 1 full e85 in the tank and run it as low as I can and then need to switch back to 93 tune. Obviously I would fill with 93 but when do you switch the tune back from e85, do I need to worry about the e85 that's still in all the fuel lines while running the 93 tune and Visa versa when switching from 93 to e85? Does that make sense since it's impossible to run each tank completely dry before switching gas and tune files.
    Current: 2018 Audi Exclusive Nogaro Blue RS3 w/Black optics, Tech, Dynamic, Drivers Assistance, RS Design Packages, Carbon Inlays, Carbon Mirror

    Past: 2014 Black S4 DSG/1999 Eclipse GSX

  24. #1664
    Established Member Two Rings
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    Just run it down until it tells you to refuel. You'll roughly have 2 gal. left and filling back up with petrol will give you a E20 mix.
    -

  25. #1665
    Established Member Two Rings seanix9's Avatar
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    Hi Arin,
    On the stage 1 tune, if U hit the rev limiter, does the tune cut the fuel or retard ignition timing?
    What are the characteristics of the tune if U aren't quick with the gears in manual mode and it hits the limiter?

    Thank U.






    Current - 2018 RS3 Sedan
    Past - 2016 RS3 SB
    Current: 2018 Ara Blue RS3 Sedan
    Past: 2016 Glacier White RS3 SB

  26. #1666
    Senior Member Three Rings FuzzyHat's Avatar
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    Quote Originally Posted by hckymstr19 View Post
    So what is the proper process in terms of properly seitching tunes, if I'm running stage 1 full e85 in the tank and run it as low as I can and then need to switch back to 93 tune. Obviously I would fill with 93 but when do you switch the tune back from e85, do I need to worry about the e85 that's still in all the fuel lines while running the 93 tune and Visa versa when switching from 93 to e85? Does that make sense since it's impossible to run each tank completely dry before switching gas and tune files.
    I’ve been running 93 map since I got the tune. Last fill up I waited till it was under “5 Miles” left in the tank and filled up with E85. Drove around 1-2 miles (soft) and stopped the car. Switched to E85 map. Again drove 1-2 miles (soft) to try to get all the 93 out. And didn’t have any issues.

    I will be switching back to 91/93 for an upcoming road trip, so I will most likely run till it says I need gas or a little less. And then put 91/93 in and then switch the map before leaving station.

    Arin, is that what you suggest for switching back from E85 map? Or is there another method?


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    2018 RS3 - APR Stage 1 - Eurocode FMIC - KW H.A.S. Springs - Milltek Bypass Pipes
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  27. #1667
    Senior Member Three Rings
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    Quote Originally Posted by FuzzyHat View Post
    I’ve been running 93 map since I got the tune. Last fill up I waited till it was under “5 Miles” left in the tank and filled up with E85. Drove around 1-2 miles (soft) and stopped the car. Switched to E85 map. Again drove 1-2 miles (soft) to try to get all the 93 out. And didn’t have any issues.

    I will be switching back to 91/93 for an upcoming road trip, so I will most likely run till it says I need gas or a little less. And then put 91/93 in and then switch the map before leaving station.

    Arin, is that what you suggest for switching back from E85 map? Or is there another method?


    Sent from my iPhone using Audizine
    Exactly, I'm just curious if there is a correct process because when you switch the tune obviously the old fuel is still in rail and all the lines, so does that e85 in the line matter when running the 93 tune? And visa versa? Just want to get APRs thoughts on the matter.
    Current: 2018 Audi Exclusive Nogaro Blue RS3 w/Black optics, Tech, Dynamic, Drivers Assistance, RS Design Packages, Carbon Inlays, Carbon Mirror

    Past: 2014 Black S4 DSG/1999 Eclipse GSX

  28. #1668
    Active Member Two Rings
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    If you have ever owned an Audi before you will know that there is a UK/EU gallon of fuel left in the tank past 0 which equates to 4.5-5l of fuel still in the tank, pump and lines. (UK gallon is larger than a US gallon) - If you have ever played "fuel gauge chicken" in an Audi you will be able to go 25-70m past 0 before the engine dies. (Dependent on model and engine) - This is a fact.

    Running to 5 miles and then driving for a further 1-2m will still see you with 4-5 litres of fuel still in the tank, pump and lines.

    I have a 2018 Audi TTRS, I live in the UK and I drove my TTRS 20 miles past the 0 indication in the hope that it would die, it did not. I then started the car on the drive, put air conditioning to low and blowers up to maximum with heated seats on. I left the car for 1 hr 30 mins and it still didn't die. I switched off and then restarted the car cold in the morning, left it for a further 20 mins on cold start and it still didn't die.

    I had a race event that morning, 30 miles from my home address so I filled up with Sunoco E85R (From Drums) switched the map to E85 and then drove 30 miles to the dragstrip off boost. By that time, I knew for a fact that there would be E85 at the injectors. I done 15-20 drag runs and come home. When the fuel range was below 40m range and off Launch control I would suffer initially with 3-4 gear change misfire (Misfire at 6500rpm, change at 6800) run through 4-5 no problems though, only happens in 3-4. When I fill up past 40 mile range again, the issue is not present. If running down below 10m range, the car will log multiple misfires. It's as if the fuel gets flung to the back of the fuel tank and the pumps cant keep up with the supply. (This is in a TTRS, fuel tank size and shape will probably be different to RS3)

    Okay, going the other way now, E85 back to 93.

    I run the TTRS 25 miles past 0, filled my car up with 57 litres of 99 octane fuel (93-94US) switched to the correct map, less than a mile from the fuel station, I then went full throttle from 4th gear and then "hit a brick wall" about 1000rpm later. Car went into limp mode with a 4000rpm limitation and a warning to take the car straight to workshop. I drove home off boost and immediately scanned VCDS and found 1 fault code.

    2838- Fuel Rail/System Pressure Too Low
    Fault priority 2 - Which is take your car to workshop

    Thinking about it later, it made sense, with E85 still in the pump and lines, the engine would have required much more fuel. As I was on the 93 map, it wasn't getting this additional fuel, hence the "brick wall" limited revs and take your car to workshop message. E85 needs 30% more fuel, it wouldn't have got that on a 93 map.

    I cleared the code, drove for a further 30 miles off boost to really ensure that 93 only was at the injectors and went full throttle and it pulled like a train and behaved normally.

    With 5 mile range in the tank and driving for a further 1-2 miles you will still have 4.5-5 litres of 93 octane in the pump, lines and the tank. Switching to E85 at this point and then going full throttle is a recipe for disaster as you will have 93 at the injectors.

    This is real world testing and I have no affiliations with anyone, just saying it how it is and what I have discovered. Sunoco E85R is guaranteed E85 content and 15% race fuel so is stronger than the E70 you guys might get at the pumps, I'm probably very close to maxing out the stock fuel system.

    My findings anyway.
    Last edited by Cbhoy24; 07-17-2018 at 07:14 AM.

  29. #1669
    Established Member Two Rings
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    Great observations Cbhoy24, particularly seeing the protection mechanism (limp mode) when fuel calibration is far enough off. Makes one feel better you won't risk blowing any engines from lean conditions on leftover E85 on a pump tune

  30. #1670
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    Quote Originally Posted by cam0719 View Post
    Great observations Cbhoy24, particularly seeing the protection mechanism (limp mode) when fuel calibration is far enough off. Makes one feel better you won't risk blowing any engines from lean conditions on leftover E85 on a pump tune
    Yes, these were my exact thoughts too. Was glad it was protected and no issues afterwards.

  31. #1671
    Senior Member Two Rings
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    The APR RS3 Development Car is here!

    Quote Originally Posted by hckymstr19 View Post
    Exactly, I'm just curious if there is a correct process because when you switch the tune obviously the old fuel is still in rail and all the lines, so does that e85 in the line matter when running the 93 tune? And visa versa? Just want to get APRs thoughts on the matter.
    When they originally posted about the E85 map, Arin’s recommendation was to actually empty (remove all gas) from the tank when putting in E85. Then give it time to get through the system. Then switch tunes.

    When switching back, he mentioned taking the tank to E and putting in conventional 91+, switching tunes, and taking it easy for a bit, as it seems like a few of you are doing.

  32. #1672
    Active Member Two Rings Optimus812's Avatar
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    Good stuff Cbhoy24. Yea my experience is going from 91 to E85 and running mine to 0 miles I still had 2 gals in the tank. It took a good couple of miles driving slow before I say my E85 gauge start showing the ethanol content move from E10 up to E72. (My stations actual was E80.. shows what two gallons of pump fuel does to ethanol content). People need to take it easy while the ethanol gets cycled thru to the injectors from gas. Next time I'll let it drain further and I won't switch tunes until I see my E85 gauge change. It's really helpful to have a E85 analyzer/gauge in the car to monitor when changing fuels.
    2018 Catalunya RS3 - APR Stg 1 E85, IE Carbon Intake, Milltek Catted DP, Iroz FMIC

  33. #1673
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Quote Originally Posted by seanix9 View Post
    Hi Arin,
    On the stage 1 tune, if U hit the rev limiter, does the tune cut the fuel or retard ignition timing?
    What are the characteristics of the tune if U aren't quick with the gears in manual mode and it hits the limiter?

    Thank U.






    Current - 2018 RS3 Sedan
    Past - 2016 RS3 SB
    In manual mode, if you don’t shift, you’ll just bounce off the limiter.
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  34. #1674
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Switching: pump out is the clear winner, but may not be practical. Get a sensor and wire it into a p3 gauge. Above e60, good to go on ethanol. Below e20, good to go on pump.

  35. #1675
    Active Member Two Rings
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    Quote Originally Posted by Arin@APR View Post
    Switching: pump out is the clear winner, but may not be practical. Get a sensor and wire it into a p3 gauge. Above e60, good to go on ethanol. Below e20, good to go on pump.
    I don't know much about modding audis but do you think there will ever be the capability to flex fuel these cars?

  36. #1676
    Established Member Two Rings
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    Quote Originally Posted by Arin@APR View Post
    Switching: pump out is the clear winner, but may not be practical. Get a sensor and wire it into a p3 gauge. Above e60, good to go on ethanol. Below e20, good to go on pump.
    ...so what happens in between?

  37. #1677
    Active Member Two Rings
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    Quote Originally Posted by 0000 RS5 View Post
    ...so what happens in between?
    The ecu should protect itself and put you into limp mode as per my lengthy post a few posts above.

  38. #1678
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    APR has raised the bar once again, resulting in a new record for the 2.5 TFSI EVO platform. An exciting 9.722 second quarter mile elapsed time was achieved at Montgomery Raceway Park on July 16th, 2018 and backed up with five 9.7 second passes. Many may recall this is same vehicle that was the first RS3 into the 9’s, owned by Keith Brantley. Results were achieved using a new hybrid turbocharger and various upcoming APR hardware modifications on an unopened stock engine long-block and transmission, in a density altitude of roughly 3,000 FT.



    Keith’s vehicle setup and modifications were as follows:

    2018 Audi RS3 2.5 TFSI
    – APR ECU / TCU Upgrade (Ethanol)
    – SRM Drop-in Stock-Housing Turbo
    – APR MPI Injectors with SRM LPFP
    – APR Carbon Fiber Intake with APR Cast Inlet
    – APR Intercooler
    – APR Cast Downpipe with Downturns
    – APR Subframe Insert
    – APR Lowering Springs
    – Forgeline Wheels with Hoosier DR2 Tires
    – Seats / Trunk Tools Removed and LW Battery



    Overall the outing was a success. Keith’s RS3 clenched a new personal best, and the new overall record for the platform. However, we’re not done yet! After pouring over the data, we’ve found several ways to improve the record by helping the vehicle transfer more of the new found power and torque to the track. Stay tuned for future updates!



    Keith’s RS3 will be on display at Waterfest at Atco, NJ this weekend, July 21st and 22nd. Come visit and see the vehicle in person! For more information about APR’s lineup of ECU Upgrades for the RS3, please visit our product page.

    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

  39. #1679
    Established Member Three Rings
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    So here is my exp with E85 fueling.

    I drove another mile hard after remaining mile reached zero.

    Then I filled full tank with E85. Sensor still indicated E10 ish and gradually went up over one mile to E60. This is when I switched from 91 to E85 tune. And within two miles it went up to E70.

    So Based on this, I would recommend to drive on 91/93 mile after filling up for couple miles gently and switch to E85 tune.


    Sent from my iPhone using Tapatalk

  40. #1680
    Stage 2 Banner Advertiser Four Rings Arin@APR's Avatar
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    Here’s a sneak peek of our intercooler: https://instagram.com/p/BlgfQHmAqyC/
    GoAPR.com | Facebook | YouTube | Twitter | Instagram
    Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180
    Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

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