CTR mods: how much extra ooomph
Discussion
Folks
Just a quick couple of questions that have probably been done before (sorry) for anyone in the know
My CTR (EP3) has a K & N filter and a Magnex stainless exhaust (cat back). Anyone know the likely power gains of just those 2 mods and also, what extra might be gained from the addition of a cat bypass pipe?
One last one, is it possible that the car would still pass an emissions test without the cat?
Many thanks in advance and once again, sorry if this is old ground but I don't log on as much as I used to
Just a quick couple of questions that have probably been done before (sorry) for anyone in the know
My CTR (EP3) has a K & N filter and a Magnex stainless exhaust (cat back). Anyone know the likely power gains of just those 2 mods and also, what extra might be gained from the addition of a cat bypass pipe?
One last one, is it possible that the car would still pass an emissions test without the cat?
Many thanks in advance and once again, sorry if this is old ground but I don't log on as much as I used to
Very little in the way of gains. Is the k&n filter in the standard air box? There will be barely any difference to the standard here if so, unless you have modified the air box at all.
The cat back will have improved the exhaust flow. Im not sure of the diameter of the magnex b-pipe, but it must be larger than standard!
Removing the cat will again improve exhaust flow, but you're likely to fail the MOT and increase the noise somewhat.
I'd ditch the magnex in favour of a race header and sports cat (Piper recently launched one), and also uprate the cat-back to something like Spoon or Toda if you're really concerned with making gains.
These parts usually come up for sale quite often on the Civic forums.
The cat back will have improved the exhaust flow. Im not sure of the diameter of the magnex b-pipe, but it must be larger than standard!
Removing the cat will again improve exhaust flow, but you're likely to fail the MOT and increase the noise somewhat.
I'd ditch the magnex in favour of a race header and sports cat (Piper recently launched one), and also uprate the cat-back to something like Spoon or Toda if you're really concerned with making gains.
These parts usually come up for sale quite often on the Civic forums.
The K&N will most likely suffer from heat soak actually making it worst than standard then. The open-cone filters dont perform too well on the CTR. ITG / AEM or Gruppe M would be a better choice.
Really depends on what you want to do with the car and how much you want to spend.
A de-cat would improve performance in terms of exhaust flow and less restriction in the system. However, replacing the manifold (header) with a decent spec one will remove the cat as well, and offer good gains. Therefore being a better choice than just a de-cat pipe.
The downside being most likely failing the mot and the noise. I think you will also need a O2 simulator to avoid the ECU detecting a fault and putting the engine managment light on.
Really depends on what you want to do with the car and how much you want to spend.
A de-cat would improve performance in terms of exhaust flow and less restriction in the system. However, replacing the manifold (header) with a decent spec one will remove the cat as well, and offer good gains. Therefore being a better choice than just a de-cat pipe.
The downside being most likely failing the mot and the noise. I think you will also need a O2 simulator to avoid the ECU detecting a fault and putting the engine managment light on.
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