D3 S8? Read this...

[1781cc]

£1250 all in, more than reasonable IMO

[gninnam]

Audi technician told me that internally FSI was known as F@ckin Stupid Idea and so it is.
Well done on the dyno results

[tonupkid]

Great result and thanks for sharing. It's good to see these brilliant FSI engines can be maintained.

[1781cc]

I think that if you've already had the work done then I wouldn't bother redoing it yet either, certainly 15k isnt enough to warranty it, but with the few good S8s that are out there in the wild at the moment it's worth anyone considering one or having just bought one, going and getting it done.

I'm literally astounded at the difference in power output between the before and after, the FSI setup is a complete joke, I know why they did it but it's short sighted. The car has now done 74k miles, if I still have her at 130,000 I'll do it again.

Cost wise for individual bits it's best to contact Aaron or Will at VRS on 01604 705247

It'll be worth noting that mine has a Miltek Non-Res cat back as the only other mod

[kele]

So with 160k miles, I should probably think seriously about doing this. Or selling it...

The only thing stopping me is that I do not consider it lacking in power in any way. More power might mean less MPG. And it does get a regular Italian tune up

[1781cc]

Originally Posted by kele

So with 160k miles, I should probably think seriously about doing this. Or selling it...

The only thing stopping me is that I do not consider it lacking in power in any way. More power might mean less MPG. And it does get a regular Italian tune up

Trust me, the 25K miles I have done in mine have been far from light, I boot it all the time, the problem is that the fuel doesn't flow over the inlet manifold, so it doesn't get cleaned, newer FSI engines switch between two sets of injectors and clean on the second inject pass, these engines never do hence they build up no matter what, its a design flaw.

I didn't think mine was slow, but clearly its been gradually going down on power and I never noticed, probably because it was down when I first got her.

I've been told to expect better fuel consumption anyway because the car will be able to breath better.

Incidentally, if your car is solid and done 160,000 whats to recommend selling her? how many miles have you done in that time?

[kele]

You are right. If it lost power over time; I probably would not notice.

It is a daily drive for me. I do around 20k miles per year in it. Just that these are some big bills. A De-coke plus a front suspension rebuild on the horizon. Big bucks that could go towards something newer.

[27litres]

I still say that a regular inlet manifold solvent clean using Liqui-Moly inlet manifold cleaner, Subaru foaming inlet manifold cleaner or whatever other reputable products are in your market (Carby/Throttle Body cleaner or Brake Cleaner is too strong for this job, you need a dedicated product), is a good preventative maintenance procedure.
Do it at a minimum of every service, even in between services.

EGR coupled with PCV is what strangles inlet manifolds on direct injection cars. No manufacturer is spared, and it's not just the Germans who suffer from it.
Just look at what's happened to diesels since emissions standards necessitated EGR. 50,000 miles and their inlet manifolds are clogged with tar, and they struggle to run severely down on power.
Catch cans work for them, maybe that's another part solution for petrol too (though they're probably illegal for emissions)?

The virtues of FSI far outweigh it's drawback IMHO. High compression ratios and high pressure turbocharging are the immediate benefits, as well as cleaner emissions and lower fuel consumption (aka greater efficiency)
Mazda employ a 14:1 compression ratio on their Skyactiv petrol engines (and rate them for 91 RON).
VAG couple a 10:1 compression ratio with 24psi turbocharging on their TSI engines.
You couldn't achieve either of these without direct injection, and it's why the modern FSI engines are so powerful compared to their immediate predecessors (especially the small stuff) without an appreciable penalty in fuel consumption.

[kele]

Originally Posted by kele

You are right. If it lost power over time; I probably would not notice.

It is a daily drive for me. I do around 20k miles per year in it. Just that these are some big bills. A De-coke plus a front suspension rebuild on the horizon. Big bucks that could go towards something newer.

So I decided to spend the money. A little spring makeover..

• Carbon Clean (walnut blast method)
• Injectors ultrasonic clean and service kit
• Front and rear lower and upper control arms
• New coil packs and spark plugs

Next job, transmission service... Then good for another 167k miles

The injectors were cleaned by James at InjectorTune. He runs a D2 S8. He provided a before and after flow rate and spay pattern report. It made sense to do them as they were out for the carbon clean anyway. It is now driving notably better and has a smoother idle.

I am very impressed with the walnut blasting. It was very effective and a lower cost than other methods. See before and after images below and judge for yourselves:

[IT]

I have very similar photos of my S6 from its recent (and still ongoing) strip down..... Its amazing how much it numbs the performance....

Or rather, its amazing what a difference it makes once cleaned