Gpro Posted July 8, 2012 Share Posted July 8, 2012 I used to think the 2nd turbo doesn't kick in but i think it does but i was used to it kicking in and producing 1 bar of boost so felt very different. Anyway at 3000 rpm the car starts making a loud noise its hard to explain the noise but i was reading up on the sequential system and still can't work it out. What usually happens at 3000rpm? everytime i done kick down it produced this loud noise which i thought somethings wrong with the 2nd turbo but yesterday on the motorway at 3000rpm if i accelerate even 5% throttle it starts producing the noise does anyone have any idea what happens after 3000rpm? Quote Link to comment Share on other sites More sharing options...
Gpro Posted July 8, 2012 Author Share Posted July 8, 2012 i forgot to add the car makes 0.8 bar max! i tryed raising it with a boost controller but won't go any higher Quote Link to comment Share on other sites More sharing options...
sideexitsupra Posted July 8, 2012 Share Posted July 8, 2012 Are you able to better describe this noise or add an audio clip or video for us to hear? Quote Link to comment Share on other sites More sharing options...
listy Posted July 8, 2012 Share Posted July 8, 2012 Second tubby should kick in around 4k rpm. If it's at 3k rpm, I wouldn't expect it to be second turbo. Possibly first though. Without hearing the son d it's pretty hard for anyone to diagnose mate Quote Link to comment Share on other sites More sharing options...
Gpro Posted July 9, 2012 Author Share Posted July 9, 2012 it aint the first turbo. 1st turbo is running fine. full throttle from 1K rpm it doesnt make the noise until it hits 3k rpm. I will try get a video during this week of the noise. Could the 1st turbo wastegate be stuck slightly open? i have noticed the wastegate on the 2nd turbo that pre spools it is stuck slightly open it won't close completly. Quote Link to comment Share on other sites More sharing options...
Supra Gaz Posted July 9, 2012 Share Posted July 9, 2012 You need a sound clip dude, its impossible to diagnose without hearing. If you are near to them, drop it down to one of the traders on here, they will have it sorted in no time. Quote Link to comment Share on other sites More sharing options...
Konrad Posted July 9, 2012 Share Posted July 9, 2012 This strange noise might be BOV releasing air slowly. Does it occur when you accelerate gently or sound appear when you are doing it hard? Quote Link to comment Share on other sites More sharing options...
Gpro Posted July 9, 2012 Author Share Posted July 9, 2012 i have changed the bov it aint that. It does it after 3K rpm all the way to redline from 5% throttle to 100% throttle Quote Link to comment Share on other sites More sharing options...
Gpro Posted July 9, 2012 Author Share Posted July 9, 2012 Alride everyone after checking it properly i think its exhaust gaskets are blowing expeshly on the 2nd turbo hence why it wont boost to 1.2 bar Quote Link to comment Share on other sites More sharing options...
Supra Gaz Posted July 9, 2012 Share Posted July 9, 2012 Could well be that dude, i hope you get it sorted Quote Link to comment Share on other sites More sharing options...
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