[quote=\"tom87\"][quote=\"tooncorsa\"]will fittin a pipercross induction kit make much differance to the performance and sound of the car[/quote]
hmm no, an induction kit will just make a bit of noise and give flat spots.[/quote]
People always carelessly throw around the term \"flat spot\" when discussing air filters.
The main reason the car performs \"badly\" is because the engine is a puny 1.2 which has been designed primarily with economy in mind - both fuel and cost to build. This means irregular internals, cheaper components and generally less attention to detail when it comes to moving gases smoothly in and our of the combustion chamber.
So before go immediately start with the anti-induction kit bollocks, take a step back and look at how you can make full use of what the induction kit has given you - the ability to BREATHE.
Flat spots
The sensation that the car is hesitating or suffering from a \"flat spot\" is due to an inconsistency with the vehicle\'s fuelling or more accurately, the air-fuel mixture ratio.
The mixture in many modern engines controlled by an ECU have the ability to adapt to climate changes, driving styles, fuel grades, etc which makes them able to perform day in day out regardless of the environment.
When you make any changes to the variables affecting the AFR, it\'s understandable that the engine will need to learn the new levels and adust either the air or fuel accordingly (normally, this is done by adjusting the fuelling rate).
Derestricting the air intake system will (should) increase the volume of air entering the engine, which will lean the AFR. For the ECU to accurately adjust to the new settings it often needs to be reset to factory settings before it can start to learn.
This may be as easy as just driving for an hour or so, or may happen over a period of journeys (stop-start).
Other times you may need to disconnect the battery for half an hour or so , maybe even need a dealer to reset via their test equipment.
Just be grateful you don\'t have to do
what 350z owners have to do lol.
In summary?
If you uprate your speakers, your music may become louder - this isn\'t a bad thing, you just turn the volume down a couple of db. If you fit performance brakes and alloy wheels, you\'ll probably get black brake dust all over your wheels - no biggie, just wash it off.
The same goes for air filters - hate something, change something!
Just because someone with a Corsa says \"induction kits give flatspots\", does that mean that the millions of satisfied customers worldwide, many with their own industry-standard test equipment, race teams, etc are all wasting their money?
[/rant]