Removing auxiliary silencers - Advantage and disadvantage

[arjunior45]

Thanks guys.

Have fun with the first legal test drive next week

Greetings,
Marc

Mark,
I'll take it for a 'test drive' this weekend {hopefully} if I'll manage to have the papers {registration} tomorrow morning. It will be a freeze weekend and that's good. But I'll drive it with the '0,6 - 0,7 bar boost / no overboost' map at the moment to see if there are any malfunctions with it. So, it won't be that fun!
My wife must become familiar with the car too and that will be an issue.
Little bit anxious to see how the car reacts in fast corners and in the rain.

So, it will be a busy weekend!

Nick

[pavs]

Nick

the wife will love it

[arjunior45]

Nick

the wife will love it

nope,
she already told me that our 'Junior' {gt1300junior - stepnose} accelerate better from low rpm {1000 - 1200 rpm} up to the rev limiter {7400 rpm} and for the more it is a rear wheel drive! She loves to go sideways all the time!

We will see this weekend.

Nick

[AlfaJack]

Cool wife you have! My missus hates the Q4!

[wrinx]

My missus hates the Q4!

Really...why?

wrinx

[cuore_sportivo_155]

the car gets more attention than her?

[Brul(tm)]

My missus hates the Q4!

I don't have that problem
She loves Alfa's, she has a 155 1.8 TS herself

Greetings,
Marc

[AlfaJack]

Really...why?

wrinx

Hate might be a bit strong. Cars are just A-B mobility things for her that should always work and never need fettling. She might be slowly coming round to my way of thinking when I bang on about dealer prices and depreciation etc

[wrinx]

Cars are just A-B mobility things for her...

That's just wrong...and you want to spend the r....ahh, done that one already

wrinx

[AlfaJack]

That's just wrong...and you want to spend the r....ahh, done that one already

wrinx

[wrinx]

wrinx

[Ditlev]

just return from the 'muffler's shop'.
Finaly I went for the 2,5" {63,5mm} tube and the impressions are:
a} almost no extra noise. Only at idle a barely notice bass rythmic noise. Can pass the MoT test easily.
b} smoother drive up to the 'boost' area
and
c} boost at 3000-3100 rpm. Before it was at 3500 rpm.

pictures before {1st - 2nd} / pictures after {3rd -4th - 5th}

This looks great, I am looking to do something similar since my silencers are broke.

Those tubes you got, where can i get them? Maybe they have a catalogue number or something I can use to get some like them?

[arjunior45]

This looks great, I am looking to do something similar since my silencers are broke.

Those tubes you got, where can i get them? Maybe they have a catalogue number or something I can use to get some like them?

the tubes are not something special. Ordinary iron tubes {like the oem tubes in the exhaust system} were bended to the shape shown in the picture. I believe that you can find these tubes in any 'muffler's shop-garage'. The question is if they will spend the time to bend them.

If you want something to last for ever you can go for inox tubes and angles. It will be easier to have the shape like that.

Nick

[Q4Jan]

My car had the same adjustment as Brul at the same shop. (A little earlier i believe, not sure anymore.)





Still very happy. Not to much noise, but i had the biggest end silencer placed that could be fitted. I believe Brul has one a little smaller, and louder.

[Brul(tm)]

I believe Brul has one a little smaller, and louder.

I have the smallest It definitely makes a bit more sound, it's more darker and has a bit more "body" or volume i guess
And i did the down pipe last year, it's been slightly modified and removed the first catalyc converter.

Greetings,
Marc

[Steve Webb]

How does the rear pipe fix onto the cat's? And did they make the pipe up on the car or fo they have a template

Looks like it gives more clearance under the car than my current setup.

[Brul(tm)]

How does the rear pipe fix onto the cat's? And did they make the pipe up on the car or fo they have a template

Looks like it gives more clearance under the car than my current setup.

It's all custom build, so no template here (from memory). If you look under my Q4 and the one from Jan, you will notice that the design of the exhaust is slightly different.
The fixing points for the exhaust are also customized. And yes, the exhaust is a bit higher or closer fixed to the car.

If you take a look at page 1 of this topic, you will find a view pictures
The cats are fitted the same way as the OEM sollution.

Greetings,
Marc

[ecl]

since you passed the mot, its time to get rid of the cats 2,5" straight from the turbo, works great,and grat sound. not so sure about the emissions though

[Q4Jan]

@brul
Did removing the first cat change the outcome on the (apk)mot?
I believe the first cat only works when the engin is cold but as you got a working example. Is this true?

My car still has all three cats present and is extremely clean.