Yarco Posted April 23, 2014 Share Posted April 23, 2014 (edited) I guess this has been asked before but I can't seem to get a definative answer when I google it. The simple questions I have are this, can I run 1.2 bar with just the second cat removed? If not what boost level is likey to be achieved? All I'm trying to work out is whether the full decat is worth all the fuss (mot). If I can get close to 1.2 bar anyway with just the second decat I'll be satisfied. Feel free to paste any links to "topic specific" threads which i've somehow missed, however personal experiences would be preferred Edited April 23, 2014 by Yarco (see edit history) Quote Link to comment Share on other sites More sharing options...
supra_ufo Posted April 23, 2014 Share Posted April 23, 2014 get the other decat done and worry about the MOT later My MOT is due on the 8th and I am worrying now.. Quote Link to comment Share on other sites More sharing options...
Yarco Posted April 23, 2014 Author Share Posted April 23, 2014 get the other decat done and worry about the MOT later My MOT is due on the 8th and I am worrying now.. Ye I know what you are saying but I want the car to be legal, not too loud and run maximum safe boost level on jdm turbos (1.2 bar). May just have to go full decat if I can't find a definative answer..... Quote Link to comment Share on other sites More sharing options...
2soops Posted April 24, 2014 Share Posted April 24, 2014 I've hit fuel cut with just 2nd decat done which I think is 1 bar but that was only once and not all the time Quote Link to comment Share on other sites More sharing options...
Littler Posted April 24, 2014 Share Posted April 24, 2014 Typically I saw 0.9-1 bar with the 2nd cat removed. Quote Link to comment Share on other sites More sharing options...
Josh Posted April 24, 2014 Share Posted April 24, 2014 With a 1st decat and 2nd cat fitted, boost stayed at 0.8bar. Go for that option instead as having the first cat fitted and raising boost causes high EGTs. Or just double decat and refit the 2nd cat for MOT which is what I do. Got it down to about an hour now on stands on the drive. If the bolts between first and second cat were easier to get to, I reckon it'd be done in 30 minutes Quote Link to comment Share on other sites More sharing options...
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