Durandal Posted August 21, 2015 Share Posted August 21, 2015 (edited) JDM supra with following mods: - first cat removed - 3" catback exhaust - innovate wideband - emanage-u (stock tune) - blow off valve - colder 8mm gapped plugs Anyone see anything out of the ordinary with these logs? The second log was a pull in 5th gear when it cut out due to boost I believe since I do not have the boost cut activated yet. Plenty rich on WOT but that will change if boost cut is added. Edited August 21, 2015 by Durandal (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 21, 2015 Share Posted August 21, 2015 Looks like you just closed the throttle to me, plus there is no boost showing in the logs, I would also say heat range 8 is too cold for a BPU, I only ever ran 7 on a big single turbo setup. Quote Link to comment Share on other sites More sharing options...
Durandal Posted August 21, 2015 Author Share Posted August 21, 2015 The boost is wired in to the airflow input so the voltage reading for that is from the stock MAP sensor. The plugs are heat range 7, maybe it is too cold. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 22, 2015 Share Posted August 22, 2015 Why are the injectors running so much duty cycle? How and where is the AFR displayed, and from what type of sensor? I too think it looks like you have just taken your foot off the accelerator. Although 4.2V is around stock fuel cut voltage from the MAP sensor. Quote Link to comment Share on other sites More sharing options...
Durandal Posted August 22, 2015 Author Share Posted August 22, 2015 I don't know why they are running such high duty cycle, they are the 440c stock ones. Should they be upgraded to something a little bit bigger? The AFR is displayed on a gauge in my dash and is the green line on the log through option port 1 analog input. It's a innovate wideband 7.35-22.39 AFR range that I installed in my first decat pipe around where the cat temp sensor was. I did take my foot of the throttle when I felt something cut out so maybe that's why it looks like that. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 22, 2015 Share Posted August 22, 2015 I do not know the spec of the engine and supporting stuff, so can't really comment further. Quote Link to comment Share on other sites More sharing options...
Durandal Posted August 22, 2015 Author Share Posted August 22, 2015 The engine is stock jdm nothing really done to it. The fuel pump was upgraded to a 255. The fuel is 95 oct which is probably adding extra duty to the injectors. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 22, 2015 Share Posted August 22, 2015 Why has it got a kludger ecu on it then, if it's near stock? Quote Link to comment Share on other sites More sharing options...
Durandal Posted August 22, 2015 Author Share Posted August 22, 2015 I got it because it was only a couple hundred more than buying Speed delimiter and BCC and gave me a platform for possibly going single in future. I also wanted to do some logging and figured there could be some benefit in some minor tuning with the lower octane available to me. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 22, 2015 Share Posted August 22, 2015 OK, understood, but vI am not sure how one is supposed to read the AFR from the graph. Quote Link to comment Share on other sites More sharing options...
Durandal Posted August 22, 2015 Author Share Posted August 22, 2015 Oh ya totally understand. The AFR goes from around 13.5 to 15 while cruising and at WOT it drops down to 9.6 to 9.7 consistently. When I come off the throttle it spikes to maximum of 22 AFR which I do not understand, maybe that's normal or maybe it has to do with the BOV. I guess I kind of figured I could bring the AFR closer to 11.5 on WOT and do something about the dip around 4000 RPM with the injector map. Quote Link to comment Share on other sites More sharing options...
Durandal Posted August 22, 2015 Author Share Posted August 22, 2015 I tried using the afr target map feature activated at 80%+ throttle to lean out the afrs at WOT. It seems to have helped, although I have heard people saying that you should not leave the afr target map on. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 22, 2015 Share Posted August 22, 2015 Never seen the target AFR map work any sense on the ultimate, the std ECU will run the injectors pretty much flat out when it sees close to boost cut voltages, which from memory is around 4.45v-4.55v. Quote Link to comment Share on other sites More sharing options...
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