Guest Carls Veilside Posted August 30, 2003 Share Posted August 30, 2003 hi all! I’ve just finished putting on my Blitz de-cat pipe (removal of 2nd Cat only) have no other mods apart from a Nur Spec Exhaust. Been out for a spin and cant seem to see any difference in sound or performance. Is it me or does something else need to be done to unlock the power????? Was Boosting at stock 0.8 before, I’m still boosting the same after the de cat??? Help anyone!! :( Quote Link to comment Share on other sites More sharing options...
ChrisR Posted August 30, 2003 Share Posted August 30, 2003 If its just the 2nd CAT then i wouldnt expect a massive difference. I replaced both cats first before exhaust and there was a slight difference, put me up to about 0.9 BAR. Get the first one out too . EDITED: Is your exhaust just the Nur backbox or the full Cat Back Nur R Quote Link to comment Share on other sites More sharing options...
Jake Posted August 30, 2003 Share Posted August 30, 2003 Yeah I agree with ChrisR, Second cat removed only gave me 0.9bar too. Removing the first one put it up to 1.25 - 1.3bar. Much more interesting at 1.25bar ! Quote Link to comment Share on other sites More sharing options...
Guest Carls Veilside Posted August 30, 2003 Share Posted August 30, 2003 Cheers for the replys guys Sort of feel ive wasted money as could of spent the same amount on a dowpipe that took both cats out. Oh well. maybe i will take a look around the For Sale/Wanted section uptill one comes up. My system is the full cat back (not just the backbox) Quote Link to comment Share on other sites More sharing options...
Jake Posted August 30, 2003 Share Posted August 30, 2003 Originally posted by Carls Veilside Sort of feel ive wasted money as could of spent the same amount on a dowpipe that took both cats out. Oh well. maybe i will take a look around the For Sale/Wanted section uptill one comes up. I don't think second-hand ones are the kind of thing that comes up for sale very often mate. I had one made up and fitted by a local stainless steel exhaust place for £125 inc fitting Quote Link to comment Share on other sites More sharing options...
Darren Posted August 30, 2003 Share Posted August 30, 2003 I found my car less laggy and that the turbos spun up quicker after 2nd CAT removal..... Quote Link to comment Share on other sites More sharing options...
dude Posted August 30, 2003 Share Posted August 30, 2003 ERR Dude you do have a 2nd (working) turbo dont you ??? John:flame Dev Quote Link to comment Share on other sites More sharing options...
ChrisR Posted August 31, 2003 Share Posted August 31, 2003 Originally posted by dude ERR Dude you do have a 2nd (working) turbo dont you ??? John:flame Dev Thats a good point, with 2nd cat out and the Nur Spec R system 0.8 BAR seems very low. WOuld have expected 1.0 BAR at least. Is your Supra UK or JAP? Quote Link to comment Share on other sites More sharing options...
Guest Carls Veilside Posted August 31, 2003 Share Posted August 31, 2003 Its a uk car with a full engine rebuild (new turbos!) Quote Link to comment Share on other sites More sharing options...
SimonB Posted September 1, 2003 Share Posted September 1, 2003 Originally posted by Carls Veilside Its a uk car with a full engine rebuild (new turbos!) You're only going to get a boost increase no a Jspec car by taking the cats out. The UKs wastegate can cope with the less restrictive system AFAIK. You're going to need a boost controller of some description. Still should get some benefit though. As for sound, I take it you've taken the baffle out :flame Dev Quote Link to comment Share on other sites More sharing options...
Keith C Posted September 2, 2003 Share Posted September 2, 2003 Nah, you still get a boost increase on UK's, just not as much of one. Quote Link to comment Share on other sites More sharing options...
atang Posted September 2, 2003 Share Posted September 2, 2003 Hi Guys, when 1st or 2nd cat been removed, does it pass MOT??? thanks. Quote Link to comment Share on other sites More sharing options...
Keith C Posted September 2, 2003 Share Posted September 2, 2003 If one *or* the other, yes. If both, no. Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 2, 2003 Share Posted September 2, 2003 Originally posted by Keith C If one *or* the other, yes. If both, no. Oh I don't know, I've heard it will still pass at some garages Quote Link to comment Share on other sites More sharing options...
Mark Kindell Posted September 2, 2003 Share Posted September 2, 2003 Originally posted by Thorin Oh I don't know, I've heard it will still pass at some garages Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted September 3, 2003 Share Posted September 3, 2003 For anyone in the Dorset/hampshire area having difficulties with getting an MOT you should try a company near Ferndown. They were excellent with my Rover 220 coupe turbo, and that had a decat pipe in it. They also do race and rally prepping for cars (as well as their own) and know what they are talking about. If anyone wants any more details PM me. Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted September 3, 2003 Share Posted September 3, 2003 I know people say that they are running 1.2 Bar daily on there cars but is it really okay to do this? What in all of your epinions is a safe boost pressure to run at using a standard Jap spec GZ TT with only a Nur spec exhaust and both cats removed? When do you need to start looking at uprated hoses, intercoolers and lower compression pistons, thicker head gaskets etc.? Obviously I'm a spastic and can't find this out for myself and would relly appreciate some genuine opinions on the matter. Quote Link to comment Share on other sites More sharing options...
SimonB Posted September 3, 2003 Share Posted September 3, 2003 Originally posted by Steve W2 For anyone in the Dorset/hampshire area having difficulties with getting an MOT you should try TRITON MOTOR SERVICES near Ferndown. They were excellent with my Rover 220 coupe turbo, and that had a decat pipe in it. They also do race and rally prepping for cars (as well as their own) and know what they are talking about. If anyone wants any more details PM me. Hey, I'll second that. I've used them and they're good (and cheap too). The guy that runs it is an ex rally driver. Quote Link to comment Share on other sites More sharing options...
Justin Posted September 3, 2003 Share Posted September 3, 2003 Originally posted by Steve W2 I know people say that they are running 1.2 Bar daily on there cars but is it really okay to do this? What in all of your epinions is a safe boost pressure to run at using a standard Jap spec GZ TT with only a Nur spec exhaust and both cats removed? When do you need to start looking at uprated hoses, intercoolers and lower compression pistons, thicker head gaskets etc.? Obviously I'm a spastic and can't find this out for myself and would relly appreciate some genuine opinions on the matter. I use my car to commute every day and of course at the weekends (300miles a week). I have a restictor plate to reduce the boost to 18 psi with my gauge warning light set to 17.5 (dunno what that is in metric) I have no cats and a Nur Spec. I thrash my car as mother nature intended me to and often see the red warning light. It has gone up to 19.7 psi on a cold day. I have had the car 2 years. Goes like a dream and got 12.8 on my best Qtr. Take from that what you will dude. J. Quote Link to comment Share on other sites More sharing options...
Steve W2 Posted September 4, 2003 Share Posted September 4, 2003 I take it that the restrictor acts the same as having a boost controller exept that you dont have the variation in boost pressure. Are there recommended siszes for restrictors to give different boost pressures? Do you know what HP and torque your pushing out with that setup? Sorry for all the questions but I am even more impressed at the Soop's capabilites and am thinking about doing this. P.S There is 14.7 psi to 1 bar so 17.5psi = 1.19 bar, NICE! Quote Link to comment Share on other sites More sharing options...
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