8x22 GT3 2bular and decat noise level?

The Oily Bits S2 Specific Topics
1

Can anyone give me an idea on the noise levels (in db) of a 2bular 8x22 GT3 with (and without) a decat (standard manifold) on an Exige S?

Gauging noise levels for trackdays.

2

When I had a normal de cat (rather than silenced) I got told off for being 107db on the drive by

not sure what it is with the silenced but it passes the 105db limit

3

id guess too loud for bedford, donny, croft, combe, goodwood. more on the drive by than static but does depend on a bunch of things - air filter, power etc

4

Mmm I’m interested in this too. I have a Komotec Sports cat fitted, considering a DeCat but if its going to increase the noise that much I’ll bin the idea :confused:

5

It will the cats take a lot of noise out

6

Static the car reads 101db at trackside tests, so can’t really afford to make it much louder. Some way down on my upgrade list is a GT style side exit exhaust, if I can get one with a bit more silencing qualities then perhaps I’ll be able to afford the extra DBs with a DeCat. We’ll see, but for now I’ll park the idea :slight_smile:

7

Thanks guys, with a fairly well used cat i am getting 102db on a stage 3 static.

Wondered how the 2bular compared and with the removal of the cat.

8

May be of help,8x22 2ubular ,MP90 blower no cat was 103 static.With a 100cell 2ubular cat at Rockingham few weeks ago was 97 ,both static

9

Thanks.

10

I just swapped a standard manifold, standard cat, and a Larini twin tip through diffuser for
a complete 2bular system - manifold, 100 cell race cat, and 8x22 GT3 H1 repackable and the result was significantly reduced noise
Before static was ~100dB first time out with the 2bular system this week at Snetterton was 95dB static

11

Just fitted a new 8x22 H1 thro diffuser with standard lotus cat.
At donny on Monday I got 94db static and no black flags with limit at 98db :slight_smile:

12

I finally got around to fitting the 2bular 8x22 GT3 (y)

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I love the look and the exposed shiny exhaust, the eliminator kit gives some extra aggressiveness that I like, but MAN ITS SOOO QUIET now after the stage 3! :frowning:

I think I need a decat ASAP!

13

I also seem to have lost the lovely “pops and bangs” it used to produce, will this likely come back when it gets “coked up”?

Would a decat help with getting those back? Or is it down to the baffling of the back box?

14

My 2bular sports cat and catback still pops and burbles on overrun :confused:

15

I may need a sports cat or decat then I guess :slight_smile:

I will leave it a couple of weeks and get a few miles on the b/box first.

16

I thought you wanted it quieter? The stage 3 would have been ubber noisy if it was old, the 2bular will get a little louder

17

I did want it quieter, but its gone from one extreme (uber loud) to the other (OEM quiet) :frowning:

I want something in the middle :wink:

18

it will be quite loud at full chat, just quiet when pootling, get someone to do a driveby for you :wink:

19

At the moment it’s in no way, shape or form loud! It’s actually pretty disappointing :frowning:

20

Mine used to be quiet …
It aint quiet anymore according to my black flag incident at Donington. .
99.7 db on the driveby …
Gt3 chambered do get louder !
Only done about 1000 miles for it to happen too…
Looking for an addon silencer for future track days.