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  1. #1
    B5QUAT's Avatar
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    Finally decatted!

    Finally got round to getting my decat pipe fitted yesterday after the MOT, so I've got 12 months before I need to worry about the emissions.



    The car is now considerably louder. Rather unpleasantly so on the motorway, if I'm honest. But at low revs and on overrun it sounds awesome. Doesn't really feel any quicker but seems to be a tad more responsive (boost climbs quicker on the gauge) but only to the same peak level and it does feel a bit freer higher up in the revs. It seemed to strangle after about 5500rpm before.

    Overall, for 40 quid 2nd hand and a couple of quid for wrap, a worthwhile mod.

    Next on the agenda, chip swap and FMIC and a rolling road session.

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  3. #2
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    Be good to see you fly past me with that fitted as I'm hoping to get a full system on mine next year sometime and I've already decatted mine is your miltek res or non res ??

    I felt some differance on spool I'd say by about 500rpm, on mine since fitting the FT and high flow manifold with the ths decat on motorway at high rpm it really roars with standard system. And round a and b roads and that it sounds mint on spool up and dumping. With no loud exhaust noise. But I'm hoping to go for a 3" full system non res but I'm thinking it may be to loud !!
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  4. #3
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    Yeah main difference i noticed when i fitted mine was that it felt much better at the top. Kept going a little bit more and changing gear it picked up quicker once the revs had dropped than it did with the cat still on. Spools up quicker aswell yeah. i`ve only got a backbox and thats it now but its always been loud even with the cat still in.

    Cactus green 8L S3 - B5 TIP + Jetex, Revised 007p, R32 rear ARB, AP Coilovers, Compbrake rear arms, Full Powerflexed dogbone.

  5. #4
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    Oh and mine passed on emissions even with a decat. Just had to hold it at higher revs for longer to settle the readings and it was pretty much on the limit so he said he wouldnt fail it as it was too close to the pass marker to bother failing it :D

    Cactus green 8L S3 - B5 TIP + Jetex, Revised 007p, R32 rear ARB, AP Coilovers, Compbrake rear arms, Full Powerflexed dogbone.

  6. #5
    "Stick a V8 in it!"

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    Theres no way you'll get under 0.2% CO without a cat. If it passed its because he let you off.

    A healthy engine will get down to about 0.5% running lambda 1 and thats about it.

    I've had a few decatted cars over the years, and they've all come in around 0.5%.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
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  7. #6
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    Yeah mine wouldn't go through but I work at a garage so they used a donor vehicle lol
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  8. #7
    B5QUAT's Avatar
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    Quote Originally Posted by Bradderz_1988 View Post
    Be good to see you fly past me with that fitted as I'm hoping to get a full system on mine next year sometime and I've already decatted mine is your miltek res or non res ??

    I felt some differance on spool I'd say by about 500rpm, on mine since fitting the FT and high flow manifold with the ths decat on motorway at high rpm it really roars with standard system. And round a and b roads and that it sounds mint on spool up and dumping. With no loud exhaust noise. But I'm hoping to go for a 3" full system non res but I'm thinking it may be to loud !!
    Yeah pop over and have a listen if you want sometime. It's the non res Milltek on mine. Knowing what I know now I would've gone for the resonated as it's simply too boomy and I'm nearly 40 now so I look like I'm having a mid life crisis! EVERYONE looks round when you gun it down the road. It's like my old Subaru days are back! lol

    You can really hear the turbo whistling too on spool up, that sounds cool.

  9. #8
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    Well true he is my mate so would have passed it regardless. He had to hold it for a good minute at higher revs than what the test is to be done at so settle the readings down. It was flicking between pass and fail and by the end of the test it was on the fail side but by 0.32 over and he said due to it being such a tiny amount over he`d never fail it for that. Where as when he did my Civic he was pissing himself in the workshop at the readings off the scale almost.

    Cactus green 8L S3 - B5 TIP + Jetex, Revised 007p, R32 rear ARB, AP Coilovers, Compbrake rear arms, Full Powerflexed dogbone.

  10. #9
    Oranoco's Avatar
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    You can order the resonated section from any Miltek dealer. I had teh part number for the non-resonated part as I wanted to loose the centre box. I would suggest we swap but I'm worried I might want to go back again.

    Life begins at 140mph
    Sell my Audi??? Kiss my rings!
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  11. #10
    B5QUAT's Avatar
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    Quote Originally Posted by Oranoco View Post
    You can order the resonated section from any Miltek dealer. I had teh part number for the non-resonated part as I wanted to loose the centre box. I would suggest we swap but I'm worried I might want to go back again.
    Ah, that's good to know. May go down that route actually. The problem is that it sounds fast, but isn't. lol. Wouldn't be so bad with 300bhp but with only 180 (less than most hot hatches these days), it can be quite embarrassing making that much noise. bit like a 1.2 Corsa with a Jap can.
    1999 B5 k04'd S4. Eibach coilovers, RS6 front brakes, RS4 Rears.

  12. #11
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    Nothing wrong with a japcan Although im too fond of bringing jap over to german as its mainly what i`ve had before and dont tend to go for the subtle things lol.

    Cactus green 8L S3 - B5 TIP + Jetex, Revised 007p, R32 rear ARB, AP Coilovers, Compbrake rear arms, Full Powerflexed dogbone.

  13. #12
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    gald ya happy with it mate :D

 

 

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