Milltek Resonated V Non-Resonated

[RS4-RAG]

Anyone in the Yorkshire or Manchestr area with a resonated, non-valve Milltek I could hear?

[RS4-RAG]

Changing over to resonated tomorrow to see what difference it makes. Non-resonated just seems to Loud and loads of done, the throttle response doesn't seem that great too. Anyone with the resonated and non-valve system who thinks it's great!

[pippyrips]

. Anyone with the resonated and non-valve system who thinks it's great!

There are quite a few with the res/non valved on here from memory who love the set up. Out of interest have you seen a change in fuel consumption with the non res/non valved set-up?

[RS4-RAG]

I don't think there is a major difference, on the display it seems to be doing better mpg - but on most occasions to hear that great tone and not just the drone, boomy sound at low revs you tend to give it some whelly which doesn't help the mpg. In my opinion if you drive it hard its great and makes all the right noises, if you don't then all you get is a loud boomy drone sound. For this reason i'm hoping the resonated will cure this issue and give it more throttle response. Otherwise for every day use the stock seemed better, and probably with the valves always open might have done the trick!

[P_G]

This boomy drone at 1500-2000 rpm is symptomatic on RS and S4's. I had the same on my old S4. IIRC it is the natural resonance point of the exhaust, regardless of whether you get resonated or non-resontade centres. It cures it slightly with resonated centres, but because of the size on pipe it still has a resonance frequency point.

That's another reaons for me consider a valved option, it apprears also to counteract the resonance frequency point even if aurally it doens' produce the same resulst as a non valved system and be a bit more pricey.

[Christy]

Some advice please, have always felt the sound of the exhaust was not quite there and having heard various non/resonated have opted for a full milltek system, however scouring through all related threads on milltek i now cant decide wether or not to go through with the instalation for fear of screwing up the car. Am i being paranoid, milltek have been great in answering all my queries but this is the first time I've dealt with them. Your comments and advice would be appreciated.

[PetrolDave]

Over on rs6 there's a guy recommending the non-res/valved.

Says with Sport off it's not much different to the OE exhaust in Sport mode, but with Sport on it sounds like a "proper" V8.

Once I've saved my pennies I reckon I'm going to go the non-res/valved route - then I can drive with Sport off when the wife is with me (I always drive with Sport on at the moment), and have Sport on at other times!

[P_G]

Great minds think alike PetrolDave, that's exactly what I am proposng doing as well! I've even gone to the point of driving with Sport mode on all the time when the family is in the car to acclimatise them to when I get the Milltek!

[Dom81]

What about the full vs cat back question...

My understanding is that full would certainly invalidate the engine warranty, may well need a remap to allow for change in back pressure, but in doing so might give better performance

There's a few too many if's and but's there for me, so is the cat back just as good if I'm mostly interested in the noise?

[pippyrips]

If you are doing this for the sound and don't want the extra hassle/cost of remaps etc then cat back does seem to be the way to go.

I've had my non res/non valved cat back system on for a week 1/2 and so far (touch wood) I've had no problems.

In an ideal world I would probably have gone for a non res/valved set-up but I picked up the system 2nd hand to the tune of £200 so it was too good an opportunity to miss out on.

Though others disagree for the type and amount of driving I do I well chuffed with it

[PetrolDave]

What about the full vs cat back question...

For me, cat-back to avoid the warranty issues.

The cost of losing the engine warranty doesn't bear thinking about!!!

[RS4-RAG]

I've now swapped over to the resonated version and I have mixed opions of it. Compared to the non res there was quite a big difference right from the start-up, the start-up on the non resonated was just awesome. Its not that much different from stock with sport on, but you can feel the better performance and working through the gears, sounds better. Will need to see how it goes for the next few weeks.

[P_G]

If you are doing this for the sound and don't want the extra hassle/cost of remaps etc then cat back does seem to be the way to go.

I've had my non res/non valved cat back system on for a week 1/2 and so far (touch wood) I've had no problems.

In an ideal world I would probably have gone for a non res/valved set-up but I picked up the system 2nd hand to the tune of £200 so it was too good an opportunity to miss out on.

Though others disagree for the type and amount of driving I do I well chuffed with it

Wow, £200? What a bargain! Cheapest I've seen a Valved non resonated cat back is £900 and it wasn't in the best condition.

[pippyrips]

If you are doing this for the sound and don't want the extra hassle/cost of remaps etc then cat back does seem to be the way to go.

I've had my non res/non valved cat back system on for a week 1/2 and so far (touch wood) I've had no problems.

In an ideal world I would probably have gone for a non res/valved set-up but I picked up the system 2nd hand to the tune of £200 so it was too good an opportunity to miss out on.

Though others disagree for the type and amount of driving I do I well chuffed with it

Wow, £200? What a bargain! Cheapest I've seen a Valved non resonated cat back is £900 and it wasn't in the best condition.

I was pleased

I picked it up in the for sale forum and after a little polish it came up like new. I would like to try a non res/valved system as that is probably the best combo but i'm happy

[RS4-RAG]

Since having the resonated version the throttle response is better albiet very similar to stock. I found just before I switched to resonated, the non resonated was slightly blowing, the clamp was not totally tight, now I'm not sure if this is why when I had the non-resonated I found it slugish and too loud? Not sure if the best solution is non-resonated valved, anyone in yorkshire with this setup or non resonated non valved to see the difference.