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Resonator delete to X pipe
Posted: Sun Oct 15, 2017 11:47 pm
by RS4B8LYF
As the title suggests, thinking of the centre res delete and X pipe in place of....any advice, better economy (marginal?) power? H pipe better? Your thoughts please. Thanks
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 7:58 am
by DeanoC
I tried so many bloody variations.
What i know is the downpipes are what will bring you the power. The OE ones are a joke and all dented and bent. A non res milltek gave me 22bhp at the wheels.
Having no centre resonator on the milltek was stupid. It sounded epic outside and on full chat but where the valves open at 2800-3500 rpm it was just deafening with drone. This is 70-80 motorway driving so unusable.
I had the optional resonator put in and it fixed all the problems but lost the top end volume and rasp.
I finally had the front silencers chopped out and replaced with an x pipe where the banks naturally join (an x pipe where the centre silencer is too far back really).
This was spot on.
Long story short I'd keep the back the same, order awe or milltek downpipes and then replace the silencers on those with an x pipe - either custom or maybe the HMS one if the diameters work.
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 8:24 am
by FaisalJ
If you're getting a custom exhaust place to do the x-pipe for you, could get them to do new downpipes for you just using the OEM main (200 cell) cats.
I paid longlife exhausts £650 for new downpipes and the x-pipe
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 8:25 am
by RS4B8LYF
Thanks guys, insightful and helpful....win win
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 8:25 am
by FaisalJ
Oh, and centre resonator/x-pipe/h-pipe will make no noticeable difference to power or economy...only the sound.
Ditching the pre-cats is the key to getting better performance, as Deano said
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 8:27 am
by RS4B8LYF
Great, as I’m coming at this with minus knowledge your inputs will save me a few hundred in “this guy is bait” quotes
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 8:50 am
by DeanoC
The B8 only has 1 set of cats on the manifolds. The ones on the downpipes are just little resonators. I found they cut the high end raspy noise rather than the deep tones. I think you can actually buy milltek downpipes without the silencers on the US spec RS5 system. I'd not buy the rest of the system.
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 8:52 am
by DeanoC
This is why you need new downpipes
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 9:01 am
by pule333
And before you ask, YES audi makes them like this!!! From the factory
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 9:10 am
by RS4B8LYF
Your shetting me, really.... ok so I’m asking for quote of new downpipes with res delete? Please add the technical language and I’ll get my quotes in :thumbs
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 9:49 am
by FaisalJ
Oh wait - what forum am I in? I'm going on about the B7!
Need coffee. Stat
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 9:57 am
by RS4B8LYF
Anyone used Powerflow?
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 12:57 pm
by DeanoC
Personally mate I'd start with everything in front of the middle resonator and leave that unless you know you want it loud, totally unsocial on a cold start and to drone like a bastard at anything below 3k rpm.
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Re: Resonator delete to X pipe
Posted: Mon Oct 16, 2017 4:27 pm
by RS4B8LYF
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