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| bry40l |
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No
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| bry40l |
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Not sure if my cat or exhaust is cracked near the drivers door so I'll be dropping into the local exhaust shop tomorrow for a quick repair. Could possibly be the gasket.
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| bry40l |
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silly question, do the ba bf falcons normally sound a little bit sporty when you get up them? in other words when driving sensible around town its quiet and if i hold it flat to the red line on the highway it will get a growl sound up from around the cat? i went to the exhaust shop and got it booked in for tommorrow because the guy suggested the cat could be buggered. altho it doesnt rattle around inside like theres loose parts. hopefully the cats buggered and it fixes my noise and economy issues.
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| 79 raven |
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From what I have been told all back pressure needed is created up to the outlet of the cat, therefore if you have had a sudden loss in economy it must be somewhere up to the cat's outlet side.
Even though it sounds like its coming from around the drivers door, maybe the sound deadening of the bonnet and the firewall is muffling the sound and it seems like its coming from around the drivers door. If you can, do a visual the best you can and while the cars running listen for any leaks. Also running your hand around exhaust joins ( of course dont touch the exhaust) while its running and check for air escaping might narrow it down. |
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| 93EB |
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Age: 47 Posts: 2485 Joined: 6th Oct 2005 Ride: 93EB Fairmont / BA Falcon XR6T Location: Western Sydney |
bry40l wrote: silly question, do the ba bf falcons normally sound a little bit sporty when you get up them? in other words when driving sensible around town its quiet and if i hold it flat to the red line on the highway it will get a growl sound up from around the cat? i went to the exhaust shop and got it booked in for tommorrow because the guy suggested the cat could be buggered. altho it doesnt rattle around inside like theres loose parts. hopefully the cats buggered and it fixes my noise and economy issues. My BA sound raspy when i get up it yes. My exhaust also has a bit of a rattle and is noticeable when the engine is hot or the idle is a bit low. Eg being in drive. I think thats due to the heat shields on it becoming a bit loose though.
_________________ 93 EB II Fairmon8 with 17' EL GT's / Clear indicators / H.I.Ds / Sports exhaust / Lowered 2' / K&N / XR6 ECU. |
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| bry40l |
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93EB wrote: bry40l wrote: silly question, do the ba bf falcons normally sound a little bit sporty when you get up them? in other words when driving sensible around town its quiet and if i hold it flat to the red line on the highway it will get a growl sound up from around the cat? i went to the exhaust shop and got it booked in for tommorrow because the guy suggested the cat could be buggered. altho it doesnt rattle around inside like theres loose parts. hopefully the cats buggered and it fixes my noise and economy issues. My BA sound raspy when i get up it yes. My exhaust also has a bit of a rattle and is noticeable when the engine is hot or the idle is a bit low. Eg being in drive. I think thats due to the heat shields on it becoming a bit loose though. yeah i was speaking to a mate who owns 2 b series a minute ago and he said the cats do cause problems on this model, also they rattle when hot and sound raspy, and also to watch out for the intake manifold/exhaust manifold coming loose, he also said the cats will crack and i should probably get it all checked, its booked in tomorrow, cbf climbing under this car pulling it apart like the old one.
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| 79 raven |
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I must admit I kinda feel a bit responsible too. It was only a few days ago I asked if the big mouth gave you a note change and now you have an exhaust problem. I swear I didnt drive up to Newy and sabotage your exhaust.
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| bry40l |
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It's been doing it for a while actually. It's just I decided to get it looked at lol
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| 79 raven |
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few, thought for a minute you'd be coming for blood. You newy blokes are f**k nuts
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| bry40l |
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So the exhaust shop said my cats starting to go. 450 for a new bolt on section or 550 for a whole new custom piece with a high flow cat and 2.5 inch pipe. As ba owners know the cat section makes up 50% of the exhaust.
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| 79 raven |
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I remember a member had told me once that there is not much difference between a brand new factory cat compared to a high flow cat performance wise. Will the extra $100 be worth saying you have a high flow or was the info I got wrong? Still considering prices for you to buy these parts those quotes arent bad really.
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| bry40l |
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79raven wrote: I remember a member had told me once that there is not much difference between a brand new factory cat compared to a high flow cat performance wise. Will the extra $100 be worth saying you have a high flow or was the info I got wrong? Still considering prices for you to buy these parts those quotes arent bad really. Well a high flow cat will be good quality plus we all know biggers better lol. Plus I told them I'd want it 2.5 inch off the cat to the front of the diff where it bolts to the rear section. Only problem is it will bring up an engine light which may need to be tuned out 
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| TheKrazeD |
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Engine is no biggy mate, I've got mine up cause of the cat. But the difference between hi-flow and standard is huge. Not only is the standard cat a massive bottleneck, but it is also very weak.
_________________ VIXEN FG XT Previous best - 14.431 @ 99.69mph with minor mods |
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| 79 raven |
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point taken. Thanks for the clarify.
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| bry40l |
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TheKrazeD wrote: Engine is no biggy mate, I've got mine up cause of the cat. But the difference between hi-flow and standard is huge. Not only is the standard cat a massive bottleneck, but it is also very weak. I wanna get it done but leave the rear standard because I like a quiet car.
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