Guest ImraanK Posted March 19, 2008 Share Posted March 19, 2008 OK so i hooked it up to ttc in the garage...didn't take it for spin..just gave it some revs till about 3000rpm and then out of no where i hear a rattle... It sounds like its coming from the 2nd turbo.. I guess in sequential you wouldn't hear anything from the 2nd turbo since its offline till 3500rpm..and most likely u will be driving the car so u prob wouldn't hear any rattle or anything... Now that its in parallel u can hear whats going on... There goes going BPU http://s233.photobucket.com/albums/ee34/mohk786/?action=view¤t=DSCF0013.flv Any ideas ? cars still drives fine though...But i guess my 2nd turbo is on its way out Got a audio clip 2... can hear the rattle allot more.. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 19, 2008 Share Posted March 19, 2008 TTC mod often makes the exhaust gas diverter valve rattle, could it be that? Quote Link to comment Share on other sites More sharing options...
4packet Posted March 19, 2008 Share Posted March 19, 2008 Your turbo is fine - the rattle is from the valve. Stick it back to sequential and forget you ever tried the mod. IMO it's a bad mod for many reasons. Most have been documented fully on here. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 19, 2008 Share Posted March 19, 2008 Your turbo is fine - the rattle is from the valve. Stick it back to sequential and forget you ever tried the mod. IMO it's a bad mod for many reasons. Most have been documented fully on here. 100% agree, should be banned Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 19, 2008 Share Posted March 19, 2008 It's quite nice if a) you're used to single turbos and b) it's mapped for fuel and timing and has a boost controller running the show. These days I find myself worrying, thinking something has gone wrong with someones car, when it feels really flat from 3000 to 4000rpm - then realise it's awaiting the second turbo to come in. Can't argue with me getting that response time and again, I've gone off the sequential power delivery Quote Link to comment Share on other sites More sharing options...
4packet Posted March 19, 2008 Share Posted March 19, 2008 I was forced to try it when I was struggling to diagnose an intermittent IACV VSV and needed the car to perform. No other mods to support it mind. I found it disturbingly noisey at certain revs and couldn't understand why the car had so much lag for such small turbos. I also remember being paranoid about the rattle. I soon switched back to sequential. Quote Link to comment Share on other sites More sharing options...
Guest ImraanK Posted March 19, 2008 Share Posted March 19, 2008 Your turbo is fine - the rattle is from the valve. Stick it back to sequential and forget you ever tried the mod. IMO it's a bad mod for many reasons. Most have been documented fully on here. ah well i hope so.Its back to sequential.. I guess i will keep it that way.. Bpu here i come Quote Link to comment Share on other sites More sharing options...
Guest ImraanK Posted March 19, 2008 Share Posted March 19, 2008 Double post Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 19, 2008 Share Posted March 19, 2008 Rushes to the defence of TTC:p mine has been this way since i first tried it nearly two years ago, and if your used to or like single turbos its great! sequential to me is just a big let down, drinks a lot of petrol for little return, apart from unwelcome fishtailing on wet and greasy roads, IE in town when you need more control, and then a long wait until you hit 4,000 and then its a let down, at least in TTC you know when your making boost Quote Link to comment Share on other sites More sharing options...
Guest ImraanK Posted March 20, 2008 Share Posted March 20, 2008 Rushes to the defence of TTC:p mine has been this way since i first tried it nearly two years ago, and if your used to or like single turbos its great! sequential to me is just a big let down, drinks a lot of petrol for little return, apart from unwelcome fishtailing on wet and greasy roads, IE in town when you need more control, and then a long wait until you hit 4,000 and then its a let down, at least in TTC you know when your making boost Yeah thats why i wanted to switch to TTC... I mostly cruise with the car...Saving petrol would be a plus.. Also like the fact you know when its gonna boost as you said..So you can drive it like one animal or like a civilized 3liter na car. But many guys here seem to think its not worth doing on the stock ecu. Are you still on the stock ecu ? Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted March 20, 2008 Share Posted March 20, 2008 TTC mod often makes the exhaust gas diverter valve rattle, could it be that? Yep, same thing happened to me. I'm happy staying with sequential twins. For the time being anyway Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted March 20, 2008 Share Posted March 20, 2008 But many guys here seem to think its not worth doing on the stock ecu. Are you still on the stock ecu ? Have a look at Tricky's sig. Its all there Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2008 Share Posted March 20, 2008 Yeah thats why i wanted to switch to TTC... I mostly cruise with the car...Saving petrol would be a plus.. Also like the fact you know when its gonna boost as you said..So you can drive it like one animal or like a civilized 3liter na car. But many guys here seem to think its not worth doing on the stock ecu. Are you still on the stock ecu ? Thats precisely why i like TTC,civilized with reasonable consumption off boost as most of the time your in closed loop, and Godzilla when you want it:d As AndrewOW says i do have piggyback management,, the std ECU runs things pretty rich once on boost, so it does benefit from removing a fair bit of fuel from the map, you can also take care of the sluggish feeling off boost by advancing the timing, the only real draw back is the extra noise, but that can also be dealt with, i have an Apexi exhaust valve so i can keep it quiet around town and when i just want to cruse, and then animal mode when i want it:innocent: i am still looking into making this automated as well. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted March 20, 2008 Share Posted March 20, 2008 Thats precisely why i like TTC,civilized with reasonable consumption off boost as most of the time your in closed loop, and Godzilla when you want it:d As AndrewOW says i do have piggyback management,, the std ECU runs things pretty rich once on boost, so it does benefit from removing a fair bit of fuel from the map, you can also take care of the sluggish feeling off boost by advancing the timing, the only real draw back is the extra noise, but that can also be dealt with, i have an Apexi exhaust valve so i can keep it quiet around town and when i just want to cruse, and then animal mode when i want it:innocent: i am still looking into making this automated as well. That all sounds marvellous to me! Near single performance without the headache of a conversion. Was it all very expensive? Quote Link to comment Share on other sites More sharing options...
Wez Posted March 20, 2008 Share Posted March 20, 2008 That all sounds marvellous to me! Near single performance without the headache of a conversion. Was it all very expensive? Not really near single performance, power delivery maybe. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted March 20, 2008 Share Posted March 20, 2008 Not really near single performance, power delivery maybe. I did say near. Or no where near, but its a lot of fun all the same Well I do understand there's a huge difference, on a budget its probably the next best thing IMO. Obviously I would really like your set up, but beggars can't be choosers Quote Link to comment Share on other sites More sharing options...
juanchan Posted March 20, 2008 Share Posted March 20, 2008 Also like the fact you know when its gonna boost as you said. How could you not know when the sequential setup is going to boost? 2k rpm, then 4k rpm. Easy. Or am I missing something? Quote Link to comment Share on other sites More sharing options...
Guest ImraanK Posted March 20, 2008 Share Posted March 20, 2008 How could you not know when the sequential setup is going to boost? 2k rpm, then 4k rpm. Easy. Or am I missing something? I know when its gonna boost in TTC mode.. while cruising or normal driving... If i keep the revs below 3500rpm+- its like a naturally aspirated which is fine for me.. If i need the extra power i no it will kick in after 3500rpm Also wouldn't there be less stress on the 2nd turbo now that is gradually spools up together with the 1st ? Im pretty sure iv read that the 2nd turbo takes the most abuse in a sequential setup. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2008 Share Posted March 20, 2008 How could you not know when the sequential setup is going to boost? 2k rpm, then 4k rpm. Easy. Or am I missing something? Have you ever driven a single turbo car? either STD or slightly modified? Sequential is very mild in its power delivery, and its meant to be, Toyota designed it like that, there is also a much more defined turbo surge/kick in other single turbo cars when there decatted= BPU. Quote Link to comment Share on other sites More sharing options...
Guest ImraanK Posted March 20, 2008 Share Posted March 20, 2008 Thats precisely why i like TTC,civilized with reasonable consumption off boost as most of the time your in closed loop, and Godzilla when you want it:d As AndrewOW says i do have piggyback management,, the std ECU runs things pretty rich once on boost, so it does benefit from removing a fair bit of fuel from the map, you can also take care of the sluggish feeling off boost by advancing the timing, the only real draw back is the extra noise, but that can also be dealt with, i have an Apexi exhaust valve so i can keep it quiet around town and when i just want to cruse, and then animal mode when i want it:innocent: i am still looking into making this automated as well. Well i am going BPU soon. Planing on 1.2 bar..Will it still run rich even at that boost ? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2008 Share Posted March 20, 2008 That all sounds marvellous to me! Near single performance without the headache of a conversion. Was it all very expensive? Not really near single unless you start with a small one, but definitely single like power delivery, I'll take you out in mine at some point and you can judge for your self, as for cost, i suppose akin to going BBU again, depending on how many toys you like;) Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted March 20, 2008 Share Posted March 20, 2008 Not really near single unless you start with a small one, but definitely single like power delivery, I'll take you out in mine at some point and you can judge for your self, as for cost, i suppose akin to going BBU again, depending on how many toys you like;) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2008 Share Posted March 20, 2008 Well i am going BPU soon. Planing on 1.2 bar..Will it still run rich even at that boost ? It will start to lean out again after 1.2bar but its the bits in between that will be way to rich, and that will defiantly detract from the performance at certain RPMs. Quote Link to comment Share on other sites More sharing options...
juanchan Posted March 20, 2008 Share Posted March 20, 2008 Have you ever driven a single turbo car? either STD or slightly modified? Sequential is very mild in its power delivery, and its meant to be, Toyota designed it like that, there is also a much more defined turbo surge/kick in other single turbo cars when there decatted= BPU. I've not driven a single, no. I'm open to offers on that one though The way I read the earlier comments wrt "knowing when the turbo will spool" implied that the stock setup wasn't predictable enough, and that TTC was one way of making the lag more so. Quote Link to comment Share on other sites More sharing options...
Kim1978 Posted December 26, 2008 Share Posted December 26, 2008 Your turbo is fine - the rattle is from the valve. Stick it back to sequential and forget you ever tried the mod. IMO it's a bad mod for many reasons. Most have been documented fully on here. Why is that? I have been doing some research on the forum but not found much to support that. Just that most ppl did not like it and went back to seq. Quote Link to comment Share on other sites More sharing options...
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