ballsoutracing Posted March 24, 2005 Share Posted March 24, 2005 Mate has 96 impreza wrx, if cats are removed are there any overboost, or fuel cut issues to overcome? Quote Link to comment Share on other sites More sharing options...
Faye Brother Posted March 25, 2005 Share Posted March 25, 2005 A standard classic WRX should be able to cope with a full decat without any adverse overboost or fuel cut issues. Standard boost pressure is about 0.9 - 1 bar for the saloon cars and approximately 0.8 for the wagons. On the original map, fuel cut occurs at a little over 1.1bar If your mate is going the decat route then, and if he hasn't done so already, he should invest in a Knocklink and a boost gauge and possibly an AFR gauge as well. As a side note, the car as standard will only have one cat which is located in the downpipe. The centre section just has a resonater in it. Hope that helps. Quote Link to comment Share on other sites More sharing options...
ballsoutracing Posted March 25, 2005 Author Share Posted March 25, 2005 Cheers mate that does indeed help, I will pass the info on. Thanks again Quote Link to comment Share on other sites More sharing options...
stealth Posted April 7, 2005 Share Posted April 7, 2005 The scoob will not suffer in anyway shape or form from a Decat..... the boost won't change as this is controlled by the ECU, there will be no fueling problems, the one thing he will note is that the Turbo spools alot quicker, it wil lcome in lower down in the rev range! The choice he has to make is whether to go for the 2.5" System or 3" system.... 3" system moves the torque right up in the rev range. I had the 3" HKS DP with the blitz Nur Spec-r... this made it the loudest car in the world, I sh1t you not this car could be heard 3 miles away, there was always a cup of tea on my parents table ready and waiting when I went to visit them because they could hear it from so far away!!! There are actually two cats in the system, one in the DP and one in the Centre.... to pass an MOT all he has to do is shove the original Centre section back in and bobs your father, brothers Dads, uncle! All the best Quote Link to comment Share on other sites More sharing options...
Faye Brother Posted April 8, 2005 Share Posted April 8, 2005 the boost won't change as this is controlled by the ECU Not true, the boost will increase a touch due to there being less restrictions in the exhaust system and as a result it becomes more free flowing. There are actually two cats in the system, one in the DP and one in the Centre. Not on a standard 96 WRX there isn't. The centre section just contains a resonater, although it is often confused for being a cat. However, as standard (non PPP) the UK classics, apart from the P1 and possibly the 22B Type UK, did get cat equipped centre sections. Quote Link to comment Share on other sites More sharing options...
stealth Posted April 8, 2005 Share Posted April 8, 2005 The boost will not gain that much that it is actually noticable so no, there are no problems with overboost etc, but the turbo will spool alot quicker and you will notice that, and hear it My 93WRX came with two Cats in it and had to put the centre section back in to Pass MOTS.... if it was just a Resonator it would never have passed the MOT. Quote Link to comment Share on other sites More sharing options...
ballsoutracing Posted April 13, 2005 Author Share Posted April 13, 2005 Thanks again people Quote Link to comment Share on other sites More sharing options...
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