how many cat does my exhaust have
#5
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You can remove both without a map, you may get overboosting so a map is a better way of getting safe power out of it, the standard ecu is pretty good, if you have a ppp fitted then I would say no, dont decat.
Tony
Tony
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Surely getting a new exhaust system on a unmapped ecu/chipped car won't effect the running performance of the engine, it's just going to be a smooth exit is it not?
Maybe a remap if you just have a hi flow sports cat?
Sam
Maybe a remap if you just have a hi flow sports cat?
Sam
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the standard map is set up with the standard restrictive exhaust, so yes if you make it more efficent the ecu map needs altering to compensate.
Depending on the car and the mods sometimes it just runs safe and you don't get the full potential out of the mods, and other times it runs unsafely and can damage the engine.
Simon
Depending on the car and the mods sometimes it just runs safe and you don't get the full potential out of the mods, and other times it runs unsafely and can damage the engine.
Simon
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why? surely just removing the 2nd cat but leaving the downpipe/cat isnt going to cause any damage without a remap?
see what jgm just said yes the 2nd cat you can prob do without any issues but the car is mapped for a certain pressure when i had mine removed by a specialist i drove home off boost and it sat there till JGM came to map it
why try to mod or boost your car half ar*ed
see what jgm just said yes the 2nd cat you can prob do without any issues but the car is mapped for a certain pressure when i had mine removed by a specialist i drove home off boost and it sat there till JGM came to map it
why try to mod or boost your car half ar*ed
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As said if you don't remap and remove the down pipe cat, then you have a good chance of over boostin. Over boostin will make you run lean(lack of fuel)
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