AlexJames Posted May 14, 2008 Share Posted May 14, 2008 Hey guys, what do you thnk about hooking the turbos up to run in parallel instead of sequential? I have never heard of this before... For those of you who havent heard of it, it makes the 2nd trubo start spinning as soon as boost is started being produced from the 1st.. giving u a smoother boost range, and supposedly, so a thread I read, gives u better performance!? Quote Link to comment Share on other sites More sharing options...
heckler Posted May 14, 2008 Share Posted May 14, 2008 Its called TTC No better performance. Quote Link to comment Share on other sites More sharing options...
dannysupratt Posted May 14, 2008 Share Posted May 14, 2008 do a search for ttc on here there are loads of debates about it Quote Link to comment Share on other sites More sharing options...
AlexJames Posted May 14, 2008 Author Share Posted May 14, 2008 do a search for ttc on here there are loads of debates about it cool, i shall do.. I dont see the point in TTC if there is no difference in performance... Quote Link to comment Share on other sites More sharing options...
heckler Posted May 14, 2008 Share Posted May 14, 2008 cool, i shall do.. I dont see the point in TTC if there is no difference in performance... power deliverey is different - gutless below 3.5k. Quote Link to comment Share on other sites More sharing options...
danny_silva Posted May 14, 2008 Share Posted May 14, 2008 it dsnt make the 2nd turbo start spnning as soon as boost is started but the other way round really!! you will only have turbo activity only from 3.5/4k mark!! it will increse mpg but let the ecu "learn" that there is not boost under 3.5/4k.... prob a bit of black smoke in begining but not to horry about, it is only over fueling because it stll "thinks" there is 1st turbo but you dont have any!! DRive with ift for a week and it will be fine!! as said already no performance increse!! Quote Link to comment Share on other sites More sharing options...
bignum Posted May 14, 2008 Share Posted May 14, 2008 I tried it a couple of years back, big let down and makes your car sound sh$te, so changed it back straight away. Quote Link to comment Share on other sites More sharing options...
JustGav Posted May 14, 2008 Share Posted May 14, 2008 Toyota spent a lot of money designing the system to run as sequential, the ECU is designed to run a sequential system, going TTC doesn't run as well as can be proven on a dyno. If you run TTC you really should run some sort of additional ECU control to do it properly. Quote Link to comment Share on other sites More sharing options...
dannysupratt Posted May 14, 2008 Share Posted May 14, 2008 I tried it a couple of years back, big let down and makes your car sound sh$te, so changed it back straight away. there you go, doesnt sound to good to me:) Quote Link to comment Share on other sites More sharing options...
Nic Posted May 14, 2008 Share Posted May 14, 2008 I ran mine for many years in TTC, with emanage mapped to suit, I would never advocate it without proper mapping. I preferred the linear power delivery and increased mid range power over the sequential setup. Good result from the conversion here also. http://mkivsupra.net/vbb/showthread.php?t=142230 Quote Link to comment Share on other sites More sharing options...
JustGav Posted May 14, 2008 Share Posted May 14, 2008 it dsnt make the 2nd turbo start spnning as soon as boost is started but the other way round really!! you will only have turbo activity only from 3.5/4k mark!! it will increse mpg but let the ecu "learn" that there is not boost under 3.5/4k.... prob a bit of black smoke in begining but not to horry about, it is only over fueling because it stll "thinks" there is 1st turbo but you dont have any!! DRive with ift for a week and it will be fine!! as said already no performance increse!! The ecu on a jspec nonvvti is MAP based as such wouldn't think there is a 1st turbo.. it would be aware that there is no boost. Quote Link to comment Share on other sites More sharing options...
Nic Posted May 14, 2008 Share Posted May 14, 2008 as said already no performance increse!! You lose low down response, but do gain mid range power over the sequential setup. If you overlay a TTC dyno and sequential dyno you can see there are gains. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 14, 2008 Share Posted May 14, 2008 Here we go again, all the negative comments by people who have tried it ( and usually not done it correctly) and didn't like it. Anyway correctly done its a very different driving experience, much more of a strong boost feel, and despite all the contrary remarks, mine is making 1 bar by 3,000 RPM:p Quote Link to comment Share on other sites More sharing options...
supra_surj Posted May 14, 2008 Share Posted May 14, 2008 Here we go again, all the negative comments by people who have tried it ( and usually not done it correctly) and didn't like it. Anyway correctly done its a very different driving experience, much more of a strong boost feel, and despite all the contrary remarks, mine is making 1 bar by 3,000 RPM:p I agree, done properly its really nice. Im running mine in TTC at the moment, but I do have a Greddy Emanage going in within a couple of weeks. Quote Link to comment Share on other sites More sharing options...
tucky40 Posted May 15, 2008 Share Posted May 15, 2008 Got to say mine is mapped in TTC and i prefer it too, full boost about 500rpm earlier than sequential so alot more midrange power. Quote Link to comment Share on other sites More sharing options...
AlexJames Posted May 15, 2008 Author Share Posted May 15, 2008 Got to say mine is mapped in TTC and i prefer it too, full boost about 500rpm earlier than sequential so alot more midrange power. 500! Quote Link to comment Share on other sites More sharing options...
tucky40 Posted May 15, 2008 Share Posted May 15, 2008 in sequentail both turbos are online and producing full boost at around 3800rpm+ in ttc both turbos are online by about 3300rpm+ producing full boost. hence 500rpm earlier. This isnt alot in lower gears but on the motorway in 4th and especially 5th gear that 500rpm equates to a larger speed range where you have 2 turbos boosting instead of the one in sequantial. Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted May 15, 2008 Share Posted May 15, 2008 I loved it as well, but then I did it properly and had my Power FC mapped to suit. It all depends on personal preference though. Quote Link to comment Share on other sites More sharing options...
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