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IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now.


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Upload 1.1.27 crypted firmware: * Download latest '''nightly''' VemsTune ( http://vems.hu/vt/ ) * Download the 1.1.27 firmware with Firmware Web tool ( VemsTune: Tools/Firmware ) ** note: coolant and air tables changed to the most common 2252_256 only in 1.1.27 at this time (maybe others will be updated too) * Upload firmware (Tools/Firmware/Firmware upload), but do not select any patch file! ---- I did not find the unambiguous mistake, but I am looking it for yet. The car works nice even on 600 idle speed turns now, and there is not a trigger error. In my final despair, ( and onto Marcell proposal ) poured an older configuration the ecu, and the trigger got fixed mistake! I copied it the dump under the other one. greeting: Ákos The mistake because I write the successor: The engine is running on idle speed, and the tachometer the megatune jumps onto 0. I did next measurements: I measured GND 11-17mv changes. I checked the polarity of a trigger. If the engine is running on idle speed, the trigger compared to the GND 4 mv shows tenseness, and when the turn jumps onto 0, then 10-12mv . The resistance of the trigger 550 ohms, his tenseness compared to the GND 144mv greeting: Ákos I made some technical modifications on the car. Turbo k26/I exchanged it for 28, 727ccm Siemens injector got involved into it, we prepared new harness, and 6 coil on plug got the car. '''BMW 6cyl firmware upgrade from 1.0.46. to 1.1.18''' note: It might be a good idea to avoid accented characters in page titles * 6 cylinder ** firing sequence, 1-5-3-6-2-4 * primary trigger: 60-2, VR * secondary trigger: not used * ignition: 3 power-output channels, wasted spark '''Ignition output channels. PLEASE SORT TO FIRING SEQUENCE, and WRITE CYLINDER NUMBER TO EACH!''' * EC36 Pin10 ignch7 * EC36 Pin34 ignch2 * EC36 Pin36 ignch3 Please '''verify that the chosen channels are power-outputs'''. Measure (with ignition ON, but engine NOT running) that voltage between +12V and the ign outputs is 0 (a logiclevel output pulls down to 0V when inactive, so that would measure 12V !) 1.0.46 firmware works great with * ignchmax=02 * h[2]=07 03 02 07 03 02 .. .. 1.1.18 firmware plan: * ignchmax=05 * h[2]=70 30 20 70 30 20 .. .. * h[1]=28 14 00 28 14 00 .. .. ** important: you might need to rotate either h[1] or h[2] to get the spark to the right cylinder(-pair). Document the wiring above (write cylinder-numbers) so we can give better hints Engine does not start, shows wheel-error. '''Trigger hints:''' * normal tooth width: 24 (=0x18, since 6 degrees) * missing tooth width: 72 (=0x48, since 18 degrees) * engine phase when to reset: 160 (reset_engphase_after=A0), though this should not cause no-start ---- '''Analog input''' * MCP3208 '''ch6''' connected to EC18pin .. ** ALS or launch works well with this (if channel 6 is selected) ** TODO: verify that it measures +5V when not pulled down externally ** measures ... V when pulled down externally with 1kOhm (you can use other resistor from 100 Ohm .. 10k, just document) * MCP3208 '''ch7''' connected to EC18pin .. ** TODO: verify that it measures +5V when not pulled down externally ** measures ... V when pulled down externally with 1kOhm (you can use other resistor from 100 Ohm .. 10k, just document) ** neither ALS nor launch works if channel 7 is selected. What can be the problem ? *** maybe input was killed ? The mcp3208 inputs are very sensitive, connecting to +12V or electrostatic discharge can damageit. You can upload the dump and logs via FileArea ---- '''NOS thoughts''' * NOS output control * and RPM and MAP (TPS?) ranges BMW M20 B25 (6cyl, appr 2.5L) modified bore ( 81 mm ) now competing in 200m and 400m dragrace (earlier it was a rally car with restriction before a smaller turbo) * high-grade forged pistons * fire-ring-headgasketseal * injectors 650 ccm * factory IX drivetrain ** final drive 3.91 ** whwel diameter 650 mm * Turbo: schwitzer S2B ** external wastegate ( 35mm ) Would NOS be useful to kick in for a short time after launch ? During launch, engine RPM drops so low that turbo doesn't work well for a short time. When the turbo spools up and boosts, NOS could be switched off. '''Would this be useful ?''' Not sure why he does not use higher launch RPM (maybe he fears the clutch would explode?) ´ Be careful with nitrous oxide if the engine bogs down on launch, even a small nitrous shot will give a very large boost in torque at a low rpm. The cylinder pressures could get very high and detonation can easlily occur. -Jörgen ---- '''Choose output for N2O''' - see GenBoard/Manual/DigitalOut/Table The guy who installed did not document the wiring. We reverse engineer from the mcd/mct dump. This is a 6 cyl engine. The 0F in h[0] looks like it came from a 4 cyl engine. (Roland has a strong 1.8L 4 cyl BMW turbo) h[0]='''0F''' 00 00 00 20 '''80 10''' 00 * injectors A-B-C-D are apparently fired in batch (all 4 at once) ** how are injectors connected ? Why are 4 injoutputs fired at the same time ? Why not 3 or 6 ? * act_rpm_channel=50 mask 0x80 (128) = EC36 pin 17 Inj H * als_tks_channel=60 mask 0x10 (16) = EC36 pin 9 Inj E '''N2O enable''' * mask 0x20 (32) '''EC36 pin 18''' Inj F ** '''choose miscoutput channel=INJ/4''' (as 20 is already in the h[2] at place 4 - remember it's numbered 0..7) unused: * mask 0x40 (64) EC36 pin 6 Inj G It turned out * ecu was used unclamped (!!) * loaded with 6 cops, each fired once per crankrot (twice as many as cops are designed) * ignition outputs had no protection (30A fuse is no protection. 5-7.5A per output is needed). Even the 30A fuse was blown once Almost a miracle that the car was running after the event. (only running at NA, and missing something - likely spark - at boost. http://www.vems.hu/files/MembersPage/poweredracing/megasquirt200804191333%206%20trafó%201.msq http://www.vems.hu/files/MembersPage/poweredracing/datalog200804191325.xls ---- '''Working mcd mct dump''' Deleted (obviously bad) confusing dates ( 2008.05.06. and Sat Apr 14 14:23:51 CEST 2007 for '''same''' mcd_mct dump ) To avoid confusion, delete the bad and leave the good (or make note of which is which). ... post good mcd mct here (so it can be identified and diff-ed to bad one) ... check these * als_launch_input=77 (same input mcp3208ch7 for ALS and launch ? Seems invalid) * wbo2_pump_pid_kd=08 (using suboptimal/bad wbo2 pump PID settings) Apply <code> wbo2_pump_pid_kp=15 wbo2_pump_pid_ki=4E wbo2_pump_pid_kd=00 wbo2_pump_pid_ilimit=FF </code> Suspicious parts of the diff -b -B -U2 (if diffing the good files) <code> --- mcd_mct_bad.txt +++ mcd_mct_good.txt ... -als_launch_input=76 +als_launch_input=77 -knock_retard_step=FF +knock_retard_step=00 # tach gauge now showing too low RPM ? -tach_div=10 +tach_div=17 -shiftcut_time=00 +shiftcut_time=01 # ignchmax=02 in both ignchmax=02 -h[1]=28 14 00 28 14 00 00 00 +h[1]=28 14 00 FF FF FF FF FF -h[2]=70 00 10 70 00 10 00 00 +h[2]=70 00 10 00 00 00 00 00 </code> Cannot see obvious errors though. We should get back when it is clear which are the old and good dumps. ---------------------------------------------------------------- Be careful using n2o for launch,proper setup absolutely does not need n2o so if you feel that n2o is only help then there is something wrong with your setup. Basically,nos is oxidizer so it should be used only for drag racing in last/last two/ gears for short time. G-force logger like G-TechPro can show you when and where you need n2o. For launch you should do other kind of optimization instead of using bottle.there is a lot of options,it's up to you what you choose. Greeting from Slovakia JAX
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