Stu Posted February 17, 2004 Share Posted February 17, 2004 Have had the car do this 3-4 times in the past 2 weeks..Not quite as loud as a backfire but a very deep pop sound..Normally happens at about 3-3500rpm when I ease off the throttle...Any ideas..thanks in advance Link to comment Share on other sites More sharing options...
Nick_TC Posted February 17, 2004 Share Posted February 17, 2004 You'll get that with a de-cat and Nur If you practise, you should get it spot on. Link to comment Share on other sites More sharing options...
Stu Posted February 17, 2004 Author Share Posted February 17, 2004 This sounds louder than a pop though its hard to explain...I think I know the sound your on about mate but this just one loud deep pop...not a series of pops ... Link to comment Share on other sites More sharing options...
Nick_TC Posted February 17, 2004 Share Posted February 17, 2004 If it's just 'off throttle' I very much doubt it's anything to worry about. If you ever heard Adam W's motor last year 'off throttle' you'd know what I mean Link to comment Share on other sites More sharing options...
foodfreak Posted February 17, 2004 Share Posted February 17, 2004 I get it all the time Stu, I think it is over fueling from the over run when you lift off. Mine is very loud:) ( I've got the Trial racing exhaust & 2nd cat in) John Link to comment Share on other sites More sharing options...
Stu Posted February 17, 2004 Author Share Posted February 17, 2004 Cheers for the replies..thanks you two..have mentioned it to leon and he is going to check her over when she goes in for service and cam belt..as I said its always when coming off throttle..Phew! Link to comment Share on other sites More sharing options...
Paul R Posted February 17, 2004 Share Posted February 17, 2004 Originally posted by Stu Cheers for the replies..thanks you two..have mentioned it to leon and he is going to check her over when she goes in for service and cam belt..as I said its always when coming off throttle..Phew! Mine was doing this a few days ago. I replaced the plugs and all was fine. It was doing it on acceleration too though. So maybee a different thing? Paul. Link to comment Share on other sites More sharing options...
Syed Shah Posted February 18, 2004 Share Posted February 18, 2004 Don't worry about it. My car pops and bangs on over-run all the time. Enjoy it Link to comment Share on other sites More sharing options...
AJI Posted February 18, 2004 Share Posted February 18, 2004 With my de-cat Hiper system you can constantly get it to back pop if you kinda hold the revs constant whilst not actually accelerating at around 2-3K rpm. But you have to be using slight engine braking aswell. But its good to hear it, its what a proper sports car should sound like ! Link to comment Share on other sites More sharing options...
Barry Posted February 18, 2004 Share Posted February 18, 2004 I never get any popping or banging. I've got both cats out, full NUR specR, and removed the baffle. Also got the turbo's running in true twin so the butterfly flap in the downpipe is wired open all the time (very loud even on tickover!!). Link to comment Share on other sites More sharing options...
Adam W Posted February 18, 2004 Share Posted February 18, 2004 Mine scare shit outta me, even when I'm expecting it. From inside the car it sounds like someone firing a shotgun, god knows what it sounds like from outside! Can be caused by mixture problems or an airleak into the exhaust, but often "just happens" on systems with minimal silencing. Link to comment Share on other sites More sharing options...
SkyJawa Posted February 18, 2004 Share Posted February 18, 2004 My Scoob used to pop and bang like crazy - it was superb My supe does the popping but not as much as my scoob Though having a hot exhaust helps Link to comment Share on other sites More sharing options...
Nick_TC Posted February 18, 2004 Share Posted February 18, 2004 Originally posted by Adam W Mine scare shit outta me, even when I'm expecting it I still havent forgotten you for the 'hot coffee on lap' experience And the kid who fell off his bike is still sitting in wait with a catapault Link to comment Share on other sites More sharing options...
Wez Posted February 19, 2004 Share Posted February 19, 2004 Its a cool sound If you really give the car some stick it helps to get some heat into the exhaust and then all the unburnt fuel ignites in the exhaust, good for the occasional flame as well. Great on trackdays when you are going through the pit lane Link to comment Share on other sites More sharing options...
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