mog-g60 0 Posted March 17, 2005 I HAVE JUST HAD A DE-CAT CUSTOM EXHAUST FITTED TO MY G60 AND WAS WONDERING IF ANYBODY KNOWS HOW MUCH BHP INCREASE THIS WOULD GIVE ME IF ANY? CHEERS MOG Quote Share this post Link to post Share on other sites
marcus 0 Posted March 17, 2005 Hi Mate. Different maufacturers claim varied results, but, apparently it's 10-15 BHP. I know i could easily feel the difference when mine was de-catted so thats all that mattered to me. Do you notice better peformance????? Quote Share this post Link to post Share on other sites
mog-g60 0 Posted March 17, 2005 YES, IT DOES FELL LIKE IT HAS MORE PULL.... Quote Share this post Link to post Share on other sites
Neil VR6 0 Posted March 18, 2005 You probablly wont get too many replies regarding an exhaust query in the "ICE & Secure" section :wink: Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted March 18, 2005 Moving.... Quote Share this post Link to post Share on other sites
Si B 0 Posted March 18, 2005 When I put a de cat on mine it seemed to breathe a bit better toward the top end but the difference was not massive. The exhaust note changed thought..... for the better! I think it is one of those mods that is worth doing (assuming your car is pre Aug 92) as it certainly complements an air filter, stainless system and more boost from a smaller pulley even if on it's own the gains aren't great. Quote Share this post Link to post Share on other sites
THEG60BIRD 0 Posted March 18, 2005 Hi Every one new to the forum not got a clue what you actually do on here, but i come to the right post going on about exhausts!! any one that can help would be greatly appreciated Cheers Sarah Quote Share this post Link to post Share on other sites
sambo 0 Posted March 18, 2005 Welcome, if you want help with anything you are in the right place but you first got to ask a qstn! :wink: Quote Share this post Link to post Share on other sites
sambo 0 Posted March 18, 2005 Back to the topic, i was told by a local well established r/r rally specialist that in most cases on most cars removing the cat makes ef all difference especially vw as they are very good(flow wise). Whenever they de-cat the car they do a r/r sess before and after, sometimes car even looses torque! Quote Share this post Link to post Share on other sites
Guest Posted March 19, 2005 A cat is a big honeycomb and your motor has to push air through this guy and as the revs get higher it becomes harder to push air through it. The cat also expands the exhaust flow and then comrpresses it again as it leaves so it does hamper exhaust flow. If you remove it you will lose some back pressure which will kill a bit of the bottom end but once the motor is spinning at higher revs it will increase power. You do incease the unburnt hydrocarbons which isn't good for the air we breath so it has its ups and downs. Cheers, Dennis Quote Share this post Link to post Share on other sites
