fastcar Posted September 26, 2010 Share Posted September 26, 2010 Hi peeps Have just gone BPU and thinking of switching the turbo system to run parrallel to iron out the that anoying hesitation when the 2nd turbo kicks in. Have allso heard that it can help with the fueling problem that occurs around 4000-5000 RPM. But dont know how true that is. One of the things that is bothering me the most is jamming the actuator's open. Is there any long term affects of doing this. Quote Link to comment Share on other sites More sharing options...
sams Posted September 26, 2010 Share Posted September 26, 2010 i havent a clue to the pros and cons, but get the car dyno'd before and after to see if there and improvements to the curve and overall power, or to see it it worse Quote Link to comment Share on other sites More sharing options...
Harry Sachs Posted September 26, 2010 Share Posted September 26, 2010 I've been running TTC for the last 6 months. I'm loving it. The car just sounds so much more aggressive Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted September 26, 2010 Share Posted September 26, 2010 ttc will give you more of a small single feel i think , a bigger kick in the ass wshen it boosts Quote Link to comment Share on other sites More sharing options...
Nic Posted September 26, 2010 Share Posted September 26, 2010 Have allso heard that it can help with the fueling problem that occurs around 4000-5000 RPM. Not true, the fueling and timing do some strange old things at the transition point where the second turbo would normally come in. I would not run the turbos in parallel unless you have an ECU mapped to suite. Running the stock turbos in parallel is very laggy and there is very little power until around 3500-4000rpm. Quote Link to comment Share on other sites More sharing options...
monsween Posted September 26, 2010 Share Posted September 26, 2010 Not true, the fueling and timing do some strange old things at the transition point where the second turbo would normally come in. I would not run the turbos in parallel unless you have an ECU mapped to suite. Running the stock turbos in parallel is very laggy and there is very little power until around 3500-4000rpm. Why do people runn TTC then? Quote Link to comment Share on other sites More sharing options...
Nic Posted September 26, 2010 Share Posted September 26, 2010 Why do people runn TTC then? I use to run the turbos on mine in parallel for a while but the ECU was mapped to suit. It gives a more linear power delivery and it feels like you get more mid range power, it is laggy, but you learn to drive around it. Quote Link to comment Share on other sites More sharing options...
Ricky49 Posted September 26, 2010 Share Posted September 26, 2010 Think mine came in about 2800rpm, I wasn't a big fan of TTC I wouldnt do it again. Also I loved the hestitation of the 2nd tubby in BPU. Just go big single. Quote Link to comment Share on other sites More sharing options...
dude Posted September 26, 2010 Share Posted September 26, 2010 Why do people runn TTC then? Cause they can't leave stuff alone The whole beauty of the Supra as stock is the twin set up, TTC is all the dissadvantages of a single with none of the advantages. Quote Link to comment Share on other sites More sharing options...
monsween Posted September 26, 2010 Share Posted September 26, 2010 Its one thing thats always confused me as i'd never consider it Other than troubleshooting Quote Link to comment Share on other sites More sharing options...
paul mac Posted September 26, 2010 Share Posted September 26, 2010 Cause they can't leave stuff alone The whole beauty of the Supra as stock is the twin set up, TTC is all the dissadvantages of a single with none of the advantages. couldn't agree more, all that time and effort Mr T spent on the sequential system, if you look at a schematic of the system its a work of art, instant boost from around 1800 rpm and then people bypass the system "cos it sounds good" Quote Link to comment Share on other sites More sharing options...
jevansio Posted September 26, 2010 Share Posted September 26, 2010 Cause they can't leave stuff alone The whole beauty of the Supra as stock is the twin set up, TTC is all the dissadvantages of a single with none of the advantages. couldn't agree more, all that time and effort Mr T spent on the sequential system, if you look at a schematic of the system its a work of art, instant boost from around 1800 rpm and then people bypass the system "cos it sounds good" I totally understand why people want to do it, that burst of torque you get when the 2nd turbo comes in which isn't relative to throttle position, I didn't like it much at all, I was much happier after going single, and the power delivery of the 996TT provides, who needs a torque curve with a hump in the middle? Quote Link to comment Share on other sites More sharing options...
fastcar Posted September 26, 2010 Author Share Posted September 26, 2010 Not true, the fueling and timing do some strange old things at the transition point where the second turbo would normally come in. I would not run the turbos in parallel unless you have an ECU mapped to suite. Running the stock turbos in parallel is very laggy and there is very little power until around 3500-4000rpm. I thought it didnt sound right when i heard it. seam's like it's more trouble then it's worth and with no real advantage. If the turbo's lag and there no real power intill 3500-4000rpm then what is the point. You dont really get much power intill that kind of rpm anyway. Sound's to me like it would make the it slower. Quote Link to comment Share on other sites More sharing options...
Bailey. Posted September 26, 2010 Share Posted September 26, 2010 I tried it on mine a few weeks ago! I'm used to single turbo cars and I personally prefer it! But I got scared about fueling at the switch over point and put it back. Oh it also makes for an easier launch IMO! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2010 Share Posted September 26, 2010 I used to run mine it permanent TTC mode IE all the relevant butterfly's wired open, so no dogey VSV behavior, and mapped for the fueling and timing oddities that TTC can give rise to. I liked it,and mine was not what i would call laggy, full boost by 2,800RPM, and much more mid range kick, but then i was always disappointed with the linear feel of the sequential system, even when BPU. Quote Link to comment Share on other sites More sharing options...
Bailey. Posted September 26, 2010 Share Posted September 26, 2010 What did u use to map it bud? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2010 Share Posted September 26, 2010 What did u use to map it bud? Emanage ultimate! Quote Link to comment Share on other sites More sharing options...
Scott Posted September 26, 2010 Share Posted September 26, 2010 Full boost by 2800rpm??? Are you sure?? In parallel, wired open, I get full boost around 3800. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2010 Share Posted September 26, 2010 Full boost by 2800rpm??? Are you sure?? In parallel, wired open, I get full boost around 3800. I had best dig up some of my data logs to double check, If i still have them, i guess i could be remembering it wrong, it was three years ago:innocent: Quote Link to comment Share on other sites More sharing options...
Scott Posted September 26, 2010 Share Posted September 26, 2010 I had best dig up some of my data logs to double check, If i still have them, i guess i could be remembering it wrong, it was three years ago:innocent: I would be very surprised, there would be no reason for Toyota to go down the sequential mode if they could get full boost by 2800rpm in parallel. In sequential my 1st turbo is just getting fully on song by then, maybe a little less. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2010 Share Posted September 26, 2010 Slight exaggeration, but full boost by 3.180RPM, see this post and my data log, i remember IanC doubted my claim but the log doesn't lie;) http://www.mkivsupra.net/vbb/showpost.php?p=1201459&postcount=33 Quote Link to comment Share on other sites More sharing options...
monsween Posted September 26, 2010 Share Posted September 26, 2010 That is only at 1 bar tho yea? Quote Link to comment Share on other sites More sharing options...
Scott Posted September 26, 2010 Share Posted September 26, 2010 Even so, it is still better than what Toyota managed. Impressive stuff, and I would say a fluke, I don't think it could be reproduced. Saying that I reckon my car will make 1bar by around 3500 in TTC. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2010 Share Posted September 26, 2010 Even so, it is still better than what Toyota managed. Impressive stuff, and I would say a fluke, I don't think it could be reproduced. Saying that I reckon my car will make 1bar by around 3500 in TTC. Shame i had deleted all my TTC logs, all i could find on my PC was my GT4088 single logs, but i assure you that was an average boost figure for my TTC set up until i went hybrid, which pushed the full boost further up the RPM range due to the metal turbines and larger size. Quote Link to comment Share on other sites More sharing options...
Lee P Posted September 27, 2010 Share Posted September 27, 2010 I completely agree with Ricky, I did a car in ttc with a power fc mapped by Ryan and it made full boost by 3200rpm. So no fluke, just seems some spool slightly earlier than others for some reason. I much prefere the way they drive in ttc but you must have an ecu and map for it to see the benefits. Quote Link to comment Share on other sites More sharing options...
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