Dyno Junkie Member 254 Member For: 17y 10m 5d Gender: Male Location: Ascot, Western Australia Posted 08/05/07 11:53 AM Share Posted 08/05/07 11:53 AM Hi guys about 4 weeks ago I noticed a drop in power and boost I checked every hose, clamp nook and cranny I drove it down to power torque engines and it was using alot of fuel, they also couldnt work it out untill mark put it on the dyno and said it didnt sound the same as before, and said it was the exhaust. So I drove it back to bundy and pulled the dump pipe and cat out and noticed the 3.5 metal cat I just had putin was ratteling so I cut the cat out and looked inside and one end was all melted and the biscut had come lose, any one else have this problemWhen you say "cat I just put in was rattling" does this mean that it started to rattle after bring fitted or was there some time before it came loose. Most cat's need to be "bedded in" by a slow gentle warm up after first being installed. With a ceramic cat you can almost guarantee that it will break if you dyno it straight after installing without bedding it in first.Did you bed in the cat? Link to comment Share on other sites More sharing options...
rednuts81 Get on the end of it..... Member 578 Member For: 19y 1m 7d Gender: Male Location: CQ Posted 08/05/07 09:32 PM Author Share Posted 08/05/07 09:32 PM When you say "cat I just put in was rattling" does this mean that it started to rattle after bring fitted or was there some time before it came loose. Most cat's need to be "bedded in" by a slow gentle warm up after first being installed. With a ceramic cat you can almost guarantee that it will break if you dyno it straight after installing without bedding it in first.Did you bed in the cat?it was in the car for a month before it was dyno d so I think it was bedded in Link to comment Share on other sites More sharing options...
AceofSpades Boostaholics anonymous Member 202 Member For: 18y 5m 12d Gender: Male Location: Broady Posted 09/05/07 07:46 AM Share Posted 09/05/07 07:46 AM My exhaust guy only asked one question when I asked his opinion on cats.It was " what fuel do you run?"he has seen MANY cats fail when running the fuel I like to call "optisoot".This fancy change of name to v-power, doesnt mean squat imho. I still believe its a cat killer.The only brand "S" fuel I use is LPG. I've had dramas with the other fuels from that company in various cars. I believe there is no sence in risking the XR to it. Link to comment Share on other sites More sharing options...
rednuts81 Get on the end of it..... Member 578 Member For: 19y 1m 7d Gender: Male Location: CQ Posted 09/05/07 08:12 AM Author Share Posted 09/05/07 08:12 AM My exhaust guy only asked one question when I asked his opinion on cats.It was " what fuel do you run?"he has seen MANY cats fail when running the fuel I like to call "optisoot".This fancy change of name to v-power, doesnt mean squat imho. I still believe its a cat killer.The only brand "S" fuel I use is LPG. I've had dramas with the other fuels from that company in various cars. I believe there is no sence in risking the XR to it.Do u have your turbo running lpg if so how dose that go. even still the cat must be pritty piss weak if it cant handle different fuels I use Ultimate and v power Link to comment Share on other sites More sharing options...
jetute Donating Members 4,553 Member For: 20y 11m 22d Gender: Male Location: brisbane Posted 09/05/07 08:35 AM Share Posted 09/05/07 08:35 AM can you post your dyno graph with af'rs and boost????safe maybe too safe??? Link to comment Share on other sites More sharing options...
rednuts81 Get on the end of it..... Member 578 Member For: 19y 1m 7d Gender: Male Location: CQ Posted 09/05/07 08:41 AM Author Share Posted 09/05/07 08:41 AM can you post your dyno graph with af'rs and boost????safe maybe too safe???ll try and find it I know it was spikeing at 14 and coming back to 10psi, and mark said he tuned it a smidgin ritch but that's how they tune all there cars Link to comment Share on other sites More sharing options...
jetute Donating Members 4,553 Member For: 20y 11m 22d Gender: Male Location: brisbane Posted 09/05/07 09:01 AM Share Posted 09/05/07 09:01 AM a bit rich can kill cats... that's the only problem.. boost sounds good!!! Link to comment Share on other sites More sharing options...
rednuts81 Get on the end of it..... Member 578 Member For: 19y 1m 7d Gender: Male Location: CQ Posted 09/05/07 09:06 AM Author Share Posted 09/05/07 09:06 AM a bit rich can kill cats... that's the only problem.. boost sounds good!!!running a smidge rich would be better wouldn it , runs cooler. the other turbo they tuned 4 months ago it also running richer than mine and the cat they put in it is holding up Link to comment Share on other sites More sharing options...
Fat-Tony Member 5,364 Member For: 18y 10m 2d Posted 09/05/07 09:08 AM Share Posted 09/05/07 09:08 AM (edited) Hence Rednuts why I am asking you exactly what your AFR's are. Now go back to fantasizing about me Edited 09/05/07 09:09 AM by Fat-Tony Link to comment Share on other sites More sharing options...
rednuts81 Get on the end of it..... Member 578 Member For: 19y 1m 7d Gender: Male Location: CQ Posted 09/05/07 09:19 AM Author Share Posted 09/05/07 09:19 AM Hence Rednuts why I am asking you exactly what your AFR's are. Now go back to fantasizing about meGod I want u Link to comment Share on other sites More sharing options...
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