2003 V8 TT Posted May 8, 2007 Report Share Posted May 8, 2007 It was a sunny weekend, and while I was on a spirited drive, I decided to lower the windows and pitch open the roof panel. This allowed me maximum audio input from my engine and exhaust :-) Question, I don't think I've ever noticed it before, but between shifts (while driving hard), I hear an air "swoosh" sound. It's quite audible, and sounds almost like a blow-off (dump) valve, only the tone is more muffled. But the thing is -- I don't have a BOV system installed in the car. Also, it's not audible when I shut the windows and roof. Is this normal? Or so I have a leak somewhere? Also, with the windows and roof panel open, I can hear air being sucked into the quarter panel/window cowling for the intake, during hard acceleration -- I assume this is normal, no? The combination of the sounds is intoxicating, and quite awesome. But I just want to make sure that none of it is a sign of damage/malfunction. Quote SPOOL 'EM UP! http://www.lotusenthusiasts.org/Cars/WilliamJan/Default.asp Link to comment Share on other sites More sharing options...
Bibs Posted May 8, 2007 Report Share Posted May 8, 2007 That sounds like the wastegate, and the sucking noise is exactly that, your car is thirsty for more air thanks to the turbos Lovely sounds Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to comment Share on other sites More sharing options...
gmendoza Posted May 8, 2007 Report Share Posted May 8, 2007 Normal Quote '03.5 Final Edition Esprit ~ 5.7lbs/hp mildly modded - 430rwhp, 353rwtq Link to comment Share on other sites More sharing options...
Kimbers Posted May 8, 2007 Report Share Posted May 8, 2007 Yup. Fine. Quote Possibly save your life. Check out this website.http://everyman-campaign.org/ Distributor for 'Every Male' grooming products. (Discounts for any TLF members hairier than I am!) Link to comment Share on other sites More sharing options...
2003 V8 TT Posted May 8, 2007 Author Report Share Posted May 8, 2007 Whew, thanks fellas! Quote SPOOL 'EM UP! http://www.lotusenthusiasts.org/Cars/WilliamJan/Default.asp Link to comment Share on other sites More sharing options...
Paula&Marcus Posted May 9, 2007 Report Share Posted May 9, 2007 Will, The noise you are hearing is absolutely normal. With stock air filters it will be hardly noticable, but with a K&N or similar you can hear it quite well. This noise is produced by the turbo-compressor-wheels itself. When you quickly close the intake butterflies the turbos keep on spinning and there is a backwave produced which hits the vanes and produces this kind of noise. Cheers Marcus www.PUKesprit.de It was a sunny weekend, and while I was on a spirited drive, I decided to lower the windows and pitch open the roof panel. This allowed me maximum audio input from my engine and exhaust :-) Question, I don't think I've ever noticed it before, but between shifts (while driving hard), I hear an air "swoosh" sound. It's quite audible, and sounds almost like a blow-off (dump) valve, only the tone is more muffled. But the thing is -- I don't have a BOV system installed in the car. Also, it's not audible when I shut the windows and roof. Is this normal? Or so I have a leak somewhere? Also, with the windows and roof panel open, I can hear air being sucked into the quarter panel/window cowling for the intake, during hard acceleration -- I assume this is normal, no? The combination of the sounds is intoxicating, and quite awesome. But I just want to make sure that none of it is a sign of damage/malfunction. Quote Marcus Link to comment Share on other sites More sharing options...
mamovaka Posted May 9, 2007 Report Share Posted May 9, 2007 the Esprit V8 is easily one of the hottest sounding exotics.. I am used to the sound of it now so when I hear a car I can tell it's the bloody ESPRIT V8.. great sounds! Quote Link to comment Share on other sites More sharing options...
2003 V8 TT Posted May 9, 2007 Author Report Share Posted May 9, 2007 Ah ha! More the reason to upgrade to the K&N filters while entertaining a pair of Hyper-Flow cats. Thanks, Marcus! -Will Will, The noise you are hearing is absolutely normal. With stock air filters it will be hardly noticable, but with a K&N or similar you can hear it quite well. This noise is produced by the turbo-compressor-wheels itself. When you quickly close the intake butterflies the turbos keep on spinning and there is a backwave produced which hits the vanes and produces this kind of noise. Cheers Marcus www.PUKesprit.de Quote SPOOL 'EM UP! http://www.lotusenthusiasts.org/Cars/WilliamJan/Default.asp Link to comment Share on other sites More sharing options...
Steven 25 Posted May 14, 2007 Report Share Posted May 14, 2007 Ah ha! More the reason to upgrade to the K&N filters while entertaining a pair of Hyper-Flow cats. Thanks, Marcus! -Will And what a sexy sound it is....... About the K&N, I heard that the oils can gum up the mass air flow senser. Is that a problem on the V8? Quote Link to comment Share on other sites More sharing options...
mike_sekinger Posted May 14, 2007 Report Share Posted May 14, 2007 The Esprit uses a map sensor, so you have nothing to worry about And what a sexy sound it is....... About the K&N, I heard that the oils can gum up the mass air flow senser. Is that a problem on the V8? Quote 1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear) 1999 S350 #002 Esprit GT1 replica Link to comment Share on other sites More sharing options...
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