Stock: 456 HP, 485 TQ
91: +46 HP, +80 TQ
E85: +86 HP, +96 TQ
E85+: +148 HP, +175 TQ
Given that it's the newest tune released for the RS5 you may be wondering why I chose IE when 034 has had such a solid, well-tested, and refined tune. While I don't currently run E85 (HPFP soon!), I don't want to be stranded running ethanol and not have a laptop to switch ECU files. If get in a bind and can only get 91 octane (only a handful of ethanol stations in my area) I will be up Shit Creek without mobile flashing. I'm aware that 034 is in the process of developing mobile flashing, but to my knowledge no timeline has been provided for its release. The second reason that I opted to try IE is for stage 2 downpipe coding. The RS5 exhaust is notably in need of some love. With downpipes and/or a full catback, this thing can sing how it was meant to. But even with spacers on my downpipes, my O˛ sensors unfortunately still flag a code. I'm not about to have a real engine code light up my CEL and be masked by the O˛ code that can be turned off by the IE tune. I daily my RS5 and can't afford to let small things slide. With as intricately engineered as this car is, it doesn't take much to starr a cascade of mechanical problems and I need to be aware of any problem that arises, no matter how small.
On to the review...
Flashing was a piece of cake. Well, it was easier than that, actually. Plug and play, with no issues mobile flashing. Cool!
The first thing I notice right off the bat is that throttle input has been revamped. It's smooth, but not so smooth that it has strayed from the pep that Audi was originally going for. Audi did a pretty awful job with making the input optimal for daily driving. I get where they were coming from, but I feel like they could have done a much better if they actually had to daily the car on i5 during rush hour. The stock input was so bad that that my wife got a pillow to help with the rough and jarring lurch that even the smallest amount of input gave her in the passenger seat. No longer! Input is now linearized. Now, it's my choice if I want to put my passengers (happily) back into their seats, as it should be. It's nice having a car that's ready to and wants to go lightspeed at a moments notice, but I don't need to be reminded of it every single time I'm in traffic or at a light and a moquito lands on the gas pedal.
The second thing I notice is the shifting. No, wait. The third thing I notice is the shifting. The second thing I notice is that I'm an inch further back my seat. I'm left feeling surprised with a stupid ear-to-ear grin every time I pull away at a light. Even at just 91 octane the gains are real and they are more than tangible. While the Racechip GTS was a nice bump and had some fun exhaust overrun, this is different. This isn't just the turbo working harder, either. This is the engine. And it's pulling every drop power that it can from pump gas, and I can't help but feel like it's hungry for more every time I reluctantly pull my foot off the pedal. I can't wait to see what ethanol can give this engine. Wow.
The shifting. The shifts are much cleaner, almost seamless. So much so that I wouldn't notice them if not for the beautiful roar of the exhaust with downpipes, and a small breath in before the next gear. There is no more slop, no more delay, and no more searching. The TCU is now a laser guided predator, and it knows exactly what to do and when to do it. Stage 2 TCU flashing provides different files for different circumstances, giving you the option to keep as much grip as those vacant city streets will let you if you like street launching. Want to chirp all four tires? You might be looking for the "aggressive launch" file. Taking those rings to the strip? "Race launch" is for you.
But... It's not all good news. While this tune provides more freedom of customization, it comes with a price (for now). If you go stage 2 to get rid of the O˛ CEL from downpipes, your dynamic mode will have the crackle tune. No if, ands, or buts. I hope that this will eventually change with an update. While I love the louder exhaust of downpipes, and some burbles or pops every now and then can be nice, I don't want to hear a good four to five seconds (yes, four to five seconds) of constant pops and burbles. And certainly not every single time I downshift, decelerate, or simply take my foot off the gas. And every time I want to let loose on dynamic? If I want to launch I have to deal with the crackles? That's not a feature I'm happy with, and I hope that the crackle tune is eventually toned down, or restricted to individual mode drive select. While it isn't obvious initially, I have found a workaround that does not sacrifice performance. I have set drive select individual mode to have everything dynamic except for engine sound which is in comfort (even in auto, crackles are present when in sport mode). I rarely launch my RS5 and having drive select in indivudal mode isn't a huge issue for me. It's certainly not optimal and is sure to be a drawback to some, if not most people looking for more performance from this platform.
Update:
CEL downpipe support apparently doesn't keep the CEL from activating due to tripping the catalyst O˛ sensor. And when it is tripped, you have to manually clear the engine code. Because restarting the car doesn't automatically remove the code. So if I had to guess, simply flashing resets the status for the sensors but doesn't stop them from tripping again, and to me, that isn't "stage 2 downpipe support." Pretty unhappy about that as it's an inconvenience that was advertised as being taken care of, but has not been remedied. Definitely going to contact support on this. Pretty nifty being able to see all my engine data and engine/transmission codes on my phone though!
This is written to convey my experience with the tune as an amateur enthusiast. If something I have written here is inaccurate please let me know so that I can correct it. Thanks!
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