Supersprint straight through, dissapointed and very annoyed!

31st October 2010, 22:20

Bought a full straight through supersprint exhaust system 2 and payed 250, and its quiet doesn't pop bang or anything , doesn't even sound a lot diff to standard can't believe it after being advised to get one !

31st October 2010, 22:22

im assuming you still have a cat, get it ouf if thats the case and will be 100 times better

31st October 2010, 22:27

Yeah this is what I don't get hoe can it make so much differance and even so all it means is ur car using to costing a lot more on petrol an with it avin no cat using to much petrol because it doesn't no how much to use an how can de catin it make it a lot louder?

31st October 2010, 22:28

is it brand new? let it carbon up inside a bit and it will sound different, I have one and it pops and bangs like a biatch!

31st October 2010, 22:31

Its about a month old now and its still a let down I av a standard cat but I dnt believe it will change as much as everyone says decatin it but its not loud and doesn't pop and bang at the min an I've no confidence that it ever will lol

31st October 2010, 22:33

Quote:

Originally Posted by SaxoMike1989

Yeah this is what I don't get hoe can it make so much differance and even so all it means is ur car using to costing a lot more on petrol an with it avin no cat using to much petrol because it doesn't no how much to use an how can de catin it make it a lot louder?

cats are restrictive. if your bothered about fuel comsumption then get a sports cat as its a good comprimise and still legal.

just letting you know i used to have a straight though centre and a decat on my vts and driving normally there was no noticable difference at all with fuel consumption, there was only a difference when using the loud pedal more

31st October 2010, 22:37

Nah I change gears at like 5-6000 revs lol its just rubbish and I can't understand why its just not loud and never ever pops and bangs just engine breaks as normal no gargley popping which is what I wanted

31st October 2010, 22:38

mine gives me a headache

31st October 2010, 22:39

*** REMOVE THE CAT ***

I wonder how many more people will say "remove the cat" on this thread?

31st October 2010, 22:40

Quote:

Originally Posted by SaxoMike1989

Nah I change gears at like 5-6000 revs lol its just rubbish and I can't understand why its just not loud and never ever pops and bangs just engine breaks as normal no gargley popping which is what I wanted

from my experience vtrs are a lot harder to get popping than 16v's. your best chance is getting a 4-1 manifold and decat/sports cat

i do sympathise with you mate as in my early days of motoring i spent a fortune on all my cars getting the right noise that i wanted out of my exhausts

31st October 2010, 22:41

My old saxo was better prob coz it was old and nackered an sent loads of petrol through like but still this is an 03 one to clean and tidy needs roughin up but 250 pound later just cnt believe its nowt I wanted gonna have to decat it an hope for a miracle , but I know it won't make much of a differance

31st October 2010, 22:43

Quote:

Originally Posted by SaxoMike1989

My old saxo was better prob coz it was old and nackered an sent loads of petrol through like but still this is an 03 one to clean and tidy needs roughin up but 250 pound later just cnt believe its nowt I wanted gonna have to decat it an hope for a miracle , but I know it won't make much of a differance

seen as though its an 03 car it will have the cat in manifold, therefore get a 4-1 mani and that will decat the car

31st October 2010, 22:52

I know all about the cat in the mani etc but that's my point I dnt fink decatin it will change as much as every1 says, I dnt see how de catin ma car can make it so much louder and pop and bang lol

31st October 2010, 22:55

it will

been there and done it.

31st October 2010, 22:55

Quote:

Originally Posted by SaxoMike1989

I know all about the cat in the mani etc but that's my point I dnt fink decatin it will change as much as every1 says, I dnt see how de catin ma car can make it so much louder and pop and bang lol

my advice is before you spend anymore money on your car go on youtube etc and watch vids of cars with your setup and decatted ones and you will see the difference. also it wont cost you any more money to find out lol

31st October 2010, 22:57

But it WILL. Think about it. People change a backbox. Suddenly there car is really loud. They have only changed a backbox. The cat is a restriction just like the backbox. So it will make a noticeable difference to the noise

31st October 2010, 23:41

i can speak through experience, i have a 51 reg vtr and my cat is in the mani, my cat has recently buggered up and now its alot louder than it was before, it goes a bit better and it pops and bangs! so many people above are right! get a new manifold with no cat and you will be happy with the result.

31st October 2010, 23:50

Quote:

Originally Posted by Chr15

it will

been there and done it.

Quote:

Originally Posted by adamskiTNR

But it WILL. Think about it. People change a backbox. Suddenly there car is really loud. They have only changed a backbox. The cat is a restriction just like the backbox. So it will make a noticeable difference to the noise

Quote:

Originally Posted by nathgvtr

i can speak through experience, i have a 51 reg vtr and my cat is in the mani, my cat has recently buggered up and now its alot louder than it was before, it goes a bit better and it pops and bangs! so many people above are right! get a new manifold with no cat and you will be happy with the result.

theres more comfirmation matey

1st November 2010, 00:10

One of the functions of the cat is to convert unburnt hydrocarbons (unburnt fuel) into hydrogen and carbon to lessen their effects on global warming.
Therefore if you remove the cat any unburnt fuel will flow further into the exhaust system where it will ignite creating the pops, bangs and flames your wanting

1st November 2010, 01:06

That's not true the cat acts on BURNT not UNBURNT products of combustion. Lambda sensor keeps the AFR to 14.7 which is stoichiometric, and means all the oxygen and fuel are spent mathematically. This is why an ECU can't make a car pass an emissions test without one. You can pass EITHER the lambda test OR the CO test, but not both without a cat

1st November 2010, 01:10

Quote:

Originally Posted by luthor1

That's not true the cat acts on BURNT not UNBURNT products of combustion. Lambda sensor keeps the AFR to 14.7 which is stoichiometric, and means all the oxygen and fuel are spent mathematically. This is why an ECU can't make a car pass an emissions test without one. You can pass EITHER the lambda test OR the CO test, but not both without a cat

+1

listen to this guy, he knows his stuff

1st November 2010, 01:40

Just put a straight through on mine and so glad it's quiet! Still annoying as hell on the motorway though.

1st November 2010, 01:42

think about it, a cat is wider than the exhaust pipe itself, it creates a huge void that the gasses must fill which in otherwords... acts like a silence, and the main purpous of the cat is to catch fuel, hence why it wont pop and bang unless your cat was nackered

1st November 2010, 01:56

Fair enough andy, im only going by what i was tought during a level chemistry, now i look like a noob

1st November 2010, 02:29

The CAT is definitely not there to 'catch fuel' either, since neat fuel will quickly destroy it! So it's just n00bie central this morning

Popping and banging is caused by LEAN mixtures. The lean mixture has insufficient fuel to combust, causing a lean misfire which puts neat fuel down the exhaust. When you are thrashing the arse out of your car, the inside of the exhaust pipe will have hot-spots which will ignite this lean-misfire causing the popping and burbling on over-run.

I often tune the Predator to pop and bang, so I am used to turning off the over-run fuel cut, and throwing a lean mixture in at 0% throttle between 1500 and 3500rpm

Andy

1st November 2010, 05:09

Quote:

Originally Posted by SaxoMike1989

Yeah this is what I don't get hoe can it make so much differance and even so all it means is ur car using to costing a lot more on petrol an with it avin no cat using to much petrol because it doesn't no how much to use an how can de catin it make it a lot louder?

I actually cant understand what the above says.

And i will add to the echo,you need to de-cat your car to get the desired noise.

Also,after reading this thread,its folk like you who are giving Saxo's a bad name.

Letting the car engine brake at 6k rpm just to get it popping and banging.

1st November 2010, 08:09

Quote:

Originally Posted by C18VTR

think about it, a cat is wider than the exhaust pipe itself, it creates a huge void that the gasses must fill which in otherwords... acts like a silence, and the main purpous of the cat is to catch fuel, hence why it wont pop and bang unless your cat was nackered

The cat is wider mainly due to the fact its a large mass with small restrictive holes in. If it was the same size as the exhaust pipe the gases would not be able to pass through fast enough. There is no void, a larger expanse would only slow the gases slightly, but they would speed up again as they go back into the exhaust. It acts like a silencer much like a baffle will

1st November 2010, 08:14

To conclude,

Remove your cat

1st November 2010, 10:38

its a VTR, not an anti-lagg'ed evo or something. its not going to throw flames and bangs out and scream all the time, which brings me to, why would you want it to??? Its nice to have a car with a decent noise to it,and by all means I do like a loud-ish exhaust tone being a massive enemy of the shitty magnex systems which perform shite and sound shite-er.
You have a good exhaust as a starting point, it has a nice tone, if you want it louder, I would suggest getting a Piper 4-1 manifold, expensive but will decat the car, give you a few more bhp and no doubt give a few bangs.

1st November 2010, 10:41

I have a VTR with the same system decat and mine pops and bangs, so loud over 4k revs!

1st November 2010, 11:03

decat ..... bt if you wanna sell pm me haha

1st November 2010, 11:26

As its one of the smallest backboxes on the market its going to be one of the loudest so getting another would not help. The only way is to change the manifold if you want loud pops and bangs.

1st November 2010, 18:13

Quote:

Originally Posted by SaxoMike1989

Nah I change gears at like 5-6000 revs lol its just rubbish and I can't understand why its just not loud and never ever pops and bangs just engine breaks as normal no gargley popping which is what I wanted

Fuck sake.

It's not straight-through til it's straight-through where the CAT used to be.

2nd November 2010, 20:35

remove that cat and get a raceland 4-2-1 fitted

2nd November 2010, 20:41

should of got a saxsport.
you would not of been dissapointed.

2nd November 2010, 20:48

get rid of the cat

2nd November 2010, 22:41

I read the first page and was about to answer in a snazzy technical manor, but i see that has already been done luthor. lol. And yeah the cat doesn't convert unburnt fuel it converts burnt fuel gases. Un burnt fuel is much nicer to the environment than the bi products of burning it. And the fuel will destroy the platinum compounds in the cat and destroy it pronto

3rd November 2010, 00:23

Raceland 4-1 I best be impressed lol thanx for all advice

3rd November 2010, 08:25

Quote:

Originally Posted by AdamDougal

should of got a saxsport.
you would not of been dissapointed.

you still will not get the pops and bangs. Its got an even bigger silencer.

3rd November 2010, 23:58

What has?

4th November 2010, 00:01

the saxsport 'zorst

4th November 2010, 00:09

Just wnt my supersprint to pop an bang which mani shud I get?

4th November 2010, 00:14

Quote:

Originally Posted by SaxoMike1989

Just wnt my supersprint to pop an bang which mani shud I get?

Your cheapest option is the Raceland 8v 4-2-1 Manifold for £148.00 off Kam Racing 'BUT' you'll have to change your oil filter to a MK1 setup, am ordering one this Friday.

http://www.youtube.com/watch?v=HkdeNOOH5_Q

4th November 2010, 00:59

I got a supersprint system on my vtr and it didnt make much difference noise wise. I then got the raceland 4-1 and de catted at really does make so much difference to the sound, i gaurantee you will not be dissapointed.

4th November 2010, 02:47

get a cherry bomb, that will make it pop

4th November 2010, 08:42

Quote:

Originally Posted by KamRacing

you still will not get the pops and bangs. Its got an even bigger silencer.

Quote:

Originally Posted by SaxoMike1989

What has?

Virtually all other backboxes. The supersprint is one / if not the smallest available (other than universal cherry bombs etc) The supersprint has a 6" cylinder and other brands are bigger to be quieter. Its all simply the cat restricting the system.

4th November 2010, 15:05

Quote:

Originally Posted by FisherVTS

get a cherry bomb, that will make it pop

they sound like the wettest fart ever. had one on my corsa on a straight through. horrendous on the motorway.

4th November 2010, 16:25

Are you running an induction filter (PiperX or similar) or the standard air filter set-up?

Changed my rear box and was disappointed with the lack of noise - changed to a PiperX induction system and over 3k revs it makes a nice growl (no pops nor bangs - but I wasn't looking for that type of effect either).

4th November 2010, 16:51

ok mate i'm gonna agree with everyone as i know lool i had a saxo vtr and all i had was a decat and a jap back box and used to pop and bubble like a bitch defo decat the cunt and you'll be popping like a gangster

4th November 2010, 16:57

You said your car was an 03 model? Get the raceland 4-1 mani made for mk2's.

It's a straight fit with no hassle of moving the oil filter.

4th November 2010, 17:20

whoa a bit late to this thread,
as said.

Remove the cat:

4th November 2010, 17:40

4-2-1 or a 4-1 manifold with out a cat WILL make the note your after! And if your still not happy, sell it and buy a saxsport by scorpion. The same as the popular pugsport for 106's and Iv had one of those on my old s1 Rallye, it was amazing!

Jack

6th November 2010, 23:50

Quote:

Originally Posted by SaxoMike1989

I know all about the cat in the mani etc but that's my point I dnt fink decatin it will change as much as every1 says, I dnt see how de catin ma car can make it so much louder and pop and bang lol

sorry but why ask for peoples advice if your not gunna listen to it, you dont have any better ideas and people on here know there stuff and in my experience they have always been spot on

8th November 2010, 10:53

The cat is like a block with loads of small holes. Its restrictive for gases and it blocks the sound as well. Replacing that with a sports cat or a straight through bit of pipe removes this restrictive point. The VTR's are massively strangled in power by the standard manifold design

8th November 2010, 11:34

Quote:

Originally Posted by KamRacing

The VTR's are massively strangled in power by the standard manifold design

I did not know this!

I knew they had an effect but not a massive one! new manifold will be on the xmas list then!

8th November 2010, 13:25

with a raceland and supersprint race exhaust system a number of customers have reported gains of 13-15bhp over standard.

8th November 2010, 13:37

a new manifold is on the xmas list for me then. for £150 the possiblity of up to 15bhp sounds very good