Silece2k6 Posted March 17, 2015 Share Posted March 17, 2015 Hi guys. Im already done with my Single Build in my 95' TwinTurbo MT6 Its a gt35 Turbo (cxracing) Oil & water cooled Topmount manifold. 3" downpipe (oem 2nd Cat), apexi 3,5" Catback 40mm Wastegate (hKS) (0,6bar Spring) Greddy type rs bov Greddy 4row fmic Aem 4" intake Aem 320lph Fuel Pump Aem Uego Wideband Greddy Profec B Spec 2 The car Runs pretty smooth with The stock ecu and injectors. At idle and cruising ive hot about 14,3-15.1 AFR If i got Full Boost about 4.500 U/min the AFR is about 10,5-11,7 BUT!! For example when i Drive in 4th Gear about 50km/h ~2.500U an give it Full trottle so The boost slowly rises up to 0,6bar and at The Spot (~4.000U) I got shortly Bad afr about 15,5-16 and The car feels like one missfire. But at 4.500U I got nice afr about 10,5-12. https://vimeo.com/122405640 Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted March 17, 2015 Share Posted March 17, 2015 Around the 4000rpm area is the changeover point for the sequential turbos. You MUST fit a stand alone ecu asap and tune it properly before you do some damage. Piggy back ecus are pretty useless at controlling the fuelling around this rpm area too so would never recommend one of those. Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 Im going to buy a AEM v2 asap, but First I had to earn some Money :-) I have a Apexi Safc and Greddy emanage blue with all harness, but you said It wouldbt help? I know how to Drive The car to skip this lean Spot but Its not the right way to Drive a Supra [emoji3] Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 I expect that misfire you feel is serious DET , stock ecu 0.6 bar boost @ 15.5 afr , I remember you posting something along these lines about a year ago and the same was said then , so credit to toyota if your engine is still in one peace. The problem you have is that in higher gears you make more boost lower down which put you in this area , you need to put your foot down harder on the throttle to force the stock ecu into open loop or drive in the correct gear to avoid that situation , or do it right and fit a stand alone ecu Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 Im going to buy a AEM v2 asap, but First I had to earn some Money :-) I have a Apexi Safc and Greddy emanage blue with all harness, but you said It wouldbt help? I know how to Drive The car to skip this lean Spot but Its not the right way to Drive a Supra [emoji3] The Greddy will work , I swear back in the early days of single turboing they was used didnt Ianc or hommer have one Quote Link to comment Share on other sites More sharing options...
Wez Posted March 17, 2015 Share Posted March 17, 2015 Oh dear Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 Yeah i postet this about a year ago but in this Time I was running the stock twins with Stock cats an boost and I had The Same issue at that rpm range... Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 (edited) I dont know what "DET" ist but its no knocking! Its just like The car got less fuel for about 1/10 sec And whats Open Loop? And WEZ, you Comment is useless! Edited March 17, 2015 by Silece2k6 (see edit history) Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted March 17, 2015 Share Posted March 17, 2015 Even the Apexi PowerFC thats current in the for sale section would do a better job than the stock ECU. Before committing to any ECU its important to choose a mapper first and ensure they are happy with the chosen technology. How do you know its not knocking? Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted March 17, 2015 Share Posted March 17, 2015 Im going to buy a AEM v2 asap, but First I had to earn some Money :-) I have a Apexi Safc and Greddy emanage blue with all harness, but you said It wouldbt help? I know how to Drive The car to skip this lean Spot but Its not the right way to Drive a Supra [emoji3] It would help but you cannot get a decent tune around the changeover point for the stock turbos, you are working against the standard ecu map, you have to run it rich which chokes the engine. Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 Yeah but Why did I had the same problem with my Stock Twins and stock Setup... And please what is DET and Open Loop? :-) Thank you Quote Link to comment Share on other sites More sharing options...
Style Posted March 17, 2015 Share Posted March 17, 2015 DET = Detonation, just another form of knock really Open Loop = Quick Google search: "When the engine is running in closed loop, it is using the A/F signal from the 02 sensor to regulate the mixture. There is a feedback "loop" between the sensor and ECU so the ECU continuously makes adjustments based on the 02 data. In open loop the 02 sensor isn't used and the ECU sets mixture based on stored maps and other sensors (coolant temp etc). Usually open loop is used on initial start and during warmup, until the 02 sensor reaches its operating temperature and produces a signal and the engine also reaches its operating temp, at which point the switch to closed loop takes place. Under heavy acceleration the system will generally go open loop (some vehicles may remain in closed loop)." Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 Thank you :-) Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 To get you out of this trouble you could always unplug the stock o2 sensor , This will put the car in fail safe run rich mode then see how your afr's behave, I had my car mapped like this for a while but fuel consumption was higher . bet yet again my piggy back ecu was mapped to compensate Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 I'll give it a try . But that still does not explain why I had the same issue with my Twins running lean at this Point... Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 what do you have as a FCD , could be that but as you are running 0.6 boost then you may as well disconnect it , to see if that resolves the issue ? when did it start doing the lean spot ? had you changed anything around that time ? Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 I had a Turbosmart fcd2 fitted and now the Greddy emanage blue only wich had the fcd function, too. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted March 17, 2015 Share Posted March 17, 2015 Personally I feel your best route is to get the car to a trusted garage that can diagnose the problem and make recommendations for you. Theres also a HKS FCon thats just gone up for sale too - cheapish but mapper as i said before could be an issue. Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 I had a Turbosmart fcd2 fitted and now the Greddy emanage blue only wich had the fcd function, too. Hang on your starting to loose me hear , do you have the greddy blue fitted already ? have you had it mapped for your single turbo ? Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 Yes i fitted the emb. All Parameters are set to "0" so it does not effect the stock ecu. Only the fcd Is set to 4.25V I tried without emb but its the Same :-) Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 Yes i fitted the emb. All Parameters are set to "0" so it does not effect the stock ecu. Only the fcd Is set to 4.25V I tried without emb but its the Same :-) If its all wired in correctly go into the fuel map and add fuel where your going lean then . what you really want to do is find a mapper local ish to you that can map it and you could have it all sorted and running to its potencial Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 I just contact a Tuner here in Germany who can Map the emb. Its not as good as the Aem v2 but it should work to get around good 500hp and Safe fuel map. Thank you Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 17, 2015 Share Posted March 17, 2015 Not quite as good but still close , I have had my piggy back running my single turbo for a few years now since late 2011 , there are a few bits to resolve with a piggy back I have found with my aemfic , but after alot of research I fixed all the bugs with mine and runs sweet . best of luck with it mate make sure you update us once you have had its mapped correctly Quote Link to comment Share on other sites More sharing options...
Silece2k6 Posted March 17, 2015 Author Share Posted March 17, 2015 Yes I will do this. Thank you :-) Quote Link to comment Share on other sites More sharing options...
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