cygnusx1 Posted June 15, 2007 Share Posted June 15, 2007 Are there any tuners out there that can help me with this little issue. If I am cruising along off throttle, when I open the throttle slow or fast I get a real fast swing on the O2 mixture gauge. If I snap throttle quickly open, the mixture gauge snaps max rich and then max lean within a half a second. I also feel a flat spot in the engine response until it recovers and pulls smoothly into proper mixture. If I snap throttle open slowly, the O2 just spikes very lean and then stabilizes. The same flat spot is felt in the motor for a second then it goes fine. I tried messing with accel parameters but nothing seems to make it much better. When I use full MAP for accel, it seems better. I checked the TPS calibration and functionality. It seems fine and reads correctly in Megatune. Could this be a function of the large 440cc injectors taking time to respond in 2-Squirts-Alternating mode? If I let it idle really rich (12.5:1) and keep the map rich for a few load points off idle, the throttle response is better, but it blows whiteish smoke if I rev it in idle and it's smelly. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted June 15, 2007 Share Posted June 15, 2007 Have you looked at using EAE? Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted June 16, 2007 Author Share Posted June 16, 2007 I forgot to mention I am using MS-II. What is EAE? I actually got it running better. I spent some more time at the keyboard and driving and was able to tune most of the flat spot out. At this point, I will just wait until I get up to the Dyno for a real tune. Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted June 16, 2007 Share Posted June 16, 2007 You need to get some Accel Enrich in. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted June 16, 2007 Share Posted June 16, 2007 Enhanced Acceleration Enrichment. http://www.msextra.com/ms2extra/MS2-Extra_Tuning_Manual.html#EAE Apparently, the manufacturers utilize this strategy to minimize problems. Been reading a bit on it - that combined with other new concepts has my head spinning! Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted June 17, 2007 Author Share Posted June 17, 2007 That is for the MS-II Extra code. I am still learning to tie my shoes with the MS-II code. EAE sounds interesting but it should be used after you have a well tuned VE table. I am still dialing in my VE table and probably won't get into a solid dyno tune until this Fall. Until then I am playing with my butt dyno. MS-II Extra looks interesting but it omits Automatic Mixture Control which is a bit dissapointing since I like being able to Autotune with the wideband O2. On the other hand, I suppose once it's dyno tuned I wont need Autotune anymore. I drove it to a car show tonight and it ran pretty good. Not as good as it ran with the stock 83 EFI but it's driveable. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted July 9, 2007 Author Share Posted July 9, 2007 It really annoys me when I find a thread that dead ends...so I try to come back to my posts and post a solution. After a couple of days of tuning with the LC-1 WB O2 sensor, datalogging, and running the automatic analysis on the datalogs and VE tables, the car is running MUCH MUCH better. I set my AFR table to range from 14:1 to 12:1 in different load conditions and the datalogging and LC-1 made it happen. The tip in throttle issues are gone. Once the VE map was tuned well, I was able to run AE in full MAP mode, with a good low threshold of 25kpa/s and very very low AE pulswidths were needed to make the engine respond nicely to throttle inputs. Look for my .msq files in the sticky. Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted July 9, 2007 Share Posted July 9, 2007 what do you mean very very low AE pulsewidths? can you shoot us a screenshot or type out the values? such as the 2v/s, 4v/s, 8v/s 15v/s?? Thanks! Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted July 9, 2007 Author Share Posted July 9, 2007 umm yessir I can as soon as I get home. The lowest setting was like 0.5ms the top was 6ms I think 40--100--200--300 kpa/s---MAP speed. 0.5--1.0--3.0--6.0 ms---PW Accel Something like that....I will screenshot it later to get the exacts. I will put them in the sticky for msq's and maps. http://forums.hybridz.org/showthread.php?p=774480#post774480 Quote Link to comment Share on other sites More sharing options...
TONY C Posted October 7, 2007 Share Posted October 7, 2007 ok I have been playing with my MSII for a while now and am satisfied with my tuning capabilities with it on my NA setup. bolt on the t3/t4 60 trim Garrett, tial wastegate and bov, extra large intercooler, and a Greddy profec b, lc-1. my question is how do I figure what kpa values to use? I am assuming they are related to the amount of boost I am running but what is that formula? thanks for any input. and yes I searched before posting but was inconclusive. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted October 7, 2007 Author Share Posted October 7, 2007 http://www.onlineconversion.com/pressure.htm Convert idle vacuum to kpa, and maximum boost to kpa and then divide it evenly across the chart. 100kpa is atmoshpere, or WOT with no boost. Idle is usually between 30-40 kpa. Quote Link to comment Share on other sites More sharing options...
TONY C Posted October 7, 2007 Share Posted October 7, 2007 ok thanks for the converter. so I want to tune for 10lbs first. I converter 10psi to kilopascal and got 68.9475728 kilopascal. not sure how to use this number tho. Did I use the correct conversioln? please enlighten me. also. once I figure it out for say 10lbs boost. and my boost control ler will store high and low settings and I want 15lbs on high. will I have to have a completely different map settings to run 15lbs. If so then it makes that little hi lo setting not as easy to use as I wanted. thanks again. Quote Link to comment Share on other sites More sharing options...
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