Main cat leave in or take out?????

[Meatball]

Im undecided if i should take my exhaust y piece out or leave it in?
Ive already removed the pre cats and gone down the straight through muffler route.
Apart from MOT time is it worth doing?

Anyone like to add/comment on this?

[That Daddy]

Leave it in

[Meatball]

That Daddy said:

Leave it in

Come on TD why?

[Pupp]

Meatball said:

That Daddy said:

Leave it in

Come on TD why?

They rattle his ear-trumpet

[MADMAX2]

Meatball id like to remove my pre cats how did u do it exactly?



cheers


Ian

[Meatball]

MADMAX2 said:

Meatball id like to remove my pre cats how did u do it exactly?



cheers


Ian

I paid a garage £100 to re weld the 4 into 1 join and take the cats out at the same time as its a real s4itty job.

[Zippee]

That Daddy said:

Leave it in

What he said - remove the main cat on the original dustbin and it'll sound very rattly, almost like a tractor IMHO. If you must go for full de-cat get the narrow pipe Y-piece from ACT.

[raceboy]

Mines FULL de-cat and straight through pipes.
It is quite loud, well when I say 'quite' I mean really f***king noisy.
On tick over it can sound a little tractorish but on full chat it's like a NASCAR, which is nice, if you like that sort of thing.
If you don't like scareing small children and the drivers behind with the flames then don't do it and if your neighbours aren't petrol heads as well they might not like it if you have too many early starts/late nights.
At cruiseing speeds it's not too bad and by riding the torque you can drop the noise and still keep pace when you need to.

Edited by raceboy on Tuesday 2nd September 09:35

[That Daddy]

Zippee said:

That Daddy said:

Leave it in

What he said - remove the main cat on the original dustbin and it'll sound very rattly, almost like a tractor IMHO. If you must go for full de-cat get the narrow pipe Y-piece from ACT.

exactly Pupp was right about the ear trumpet though ,,,,,, Uncanny

Edited by That Daddy on Tuesday 2nd September 09:38

[steve-V8s]

If you do any MSA controlled motor sport(sprinting for example), depending on the age of the car it may be worth bearing in mind the probability that a CAT will be a requirement soon. Quite how the scrutineers are going to check for it however is unclear.

[Chimjunkie]

Dont forget the smell without a cat!

[Meatball]

Its not the additional noise im after as its aleady very loud, im suduced by the extra hp gains as every little helps (bit sad really).
Why cant i just leave the bloody thing alone

[Chimjunkie]

Meatball said:

Its not the additional noise im after as its aleady very loud, im suduced by the extra hp gains as every little helps (bit sad really).
Why cant i just leave the bloody thing alone

The problem is quite clear. You only have a measly 298bhp. You want the big 300!! Dont deny it. Because i am in the same boat with 292bhp

[Meatball]

Chimjunkie said:

Meatball said:

Its not the additional noise im after as its aleady very loud, im suduced by the extra hp gains as every little helps (bit sad really).
Why cant i just leave the bloody thing alone

The problem is quite clear. You only have a measly 298bhp. You want the big 300!! Dont deny it. Because i am in the same boat with 292bhp

It sucks dont it im grasping at straws jon
Mind you mine is a 450

[Chimjunkie]

OK. Dont have to rub it in! Recon you would gain 5bhp from removing the alternator and installing flexible solar panels on the bonnet and boot.

[Bomber Denton]

Take it out Ben, you know it makes sense!

[That Daddy]

You do know that it will mean problems come MOT time,no get around this the car as to meet those limits no exceptions unless it was registered early enough to be exempt from cat testing.

[clive f]

just get a raplacement pipe, and put the cat y piece back in come mot time, it`ll only take about 1hr.

[raceboy]

Mines been cat-less now for about 5 years, never had any MOT issues.