fsi / carbon buildup

[Cody Forbes]

To elaborate, they have all-metal fuel systems including stainless lines and an aluminum intake manifold. They do indeed have a flex fuel (ethanol content) sensor.

-Cody Forbes (mobile)

On Jun 6, 2014, at 1:56 PM, thejimrose <thejimrose at gmail.com> wrote:

> w/out a sensor to automatically detect the fuel, and automatically switch maps seems more work than it's worth IMO. 
> 
> which BTW my buddy w the 14 AR says has neither sensor nor map - so not sure how that car is e85 'compatible', other than 'well you could put it in the tank'.  
> 
> 
> On Fri, Jun 6, 2014 at 10:35 AM, Cody Forbes <cody at 5000tq.com> wrote:
>> Just wait until you see the gains on the forthcoming E85 tune from APR for these cars!
>> 
>> -Cody Forbes (mobile)
>> 
>> On Jun 6, 2014, at 12:59 PM, thejimrose <thejimrose at gmail.com> wrote:
>> 
>>> no kidding!? great now i want an allroad MOAR. =)
>>> 
>>> 
>>> On Fri, Jun 6, 2014 at 9:34 AM, Cody Forbes <cody at 5000tq.com> wrote:
>>>> No need for rumor, I've personally seen "5th injector" cars here in North America. Every new Allroad I've seen had it, and a few 2014 A4's. they are also flex fuel compatible.
>>>> 
>>>> -Cody Forbes (mobile)
>>>> 
>>>> On Jun 6, 2014, at 11:40 AM, thejimrose <thejimrose at gmail.com> wrote:
>>>> 
>>>> > rumor is that the euro audis [not m/a yet] are using upstream injectors
>>>> > [intake] to wash the backs of the valves to prevent / minimize carbon
>>>> > buildup. read any rs4 forum about it, the pictures are a horrorshow. guys
>>>> > rolling in with the ports 50% clogged and putting down 200hp. agreed that
>>>> > it's a 40k service check / job. i think most shops are doing it for a few
>>>> > 100$. it's not a nightmare, just another component to the vag ownership
>>>> > 'character'. trade your cam follower checks / replacements with decarbon
>>>> > treatments.
>>>> >
>>>> > also it sounds like guys running pcv deletes, catch cans, and frequent
>>>> > seafoaming in the intake still doesn't prevent the carbon buildup. i know
>>>> > nothing of chemistry but it makes sense that you need some fuel to act as a
>>>> > solvent to prevent carbon from forming when the engine is hot, once it
>>>> > forms/hardens during the drive cycle it's probably mostly there to stay,
>>>> > until it's forcibly removed a la media blasting and dental picks.
>>>> >
>>>> > no such issues on my sti. of course the ride quality is like being in a
>>>> > metal trashcan full of hammers rolled down a hill.
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>