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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. Visit Preferences to set your user name Summary of change: Installing VEMS V3.3 in a Suzuki Swift GTI 1,3 16v mk1 used fore rallycross. --------- MembersPage/HansK/SuzukiSwiftGTIMK/FlyBack MembersPage/HansK/SuzukiSwiftGTIMK/WBo2 -------- I have made a adaptor from the original harness to the VEMS box + a new wire to the ignition-coil (disconnected the original) because it originally is mechanical-ignition. http://www.vems.hu/files/HansK/Swift_GTI_MK1/megasquirt200705072029.msq The box was mounted in one evening and all was working but the trigger turned out to have problems af hi rpm.. Here is the trigger-signal: 1:10 probe -> up to 500mV.. and down to 0V +- 400mV skiks :-( http://www.vems.hu/files/HansK/Swift_GTI_MK1/IMG_1832.JPG When running pin 5 on LM1815 to +V the trigger-signal starts dropping out when reaching 5-6000rpm.. http://www.vems.hu/files/HansK/Swift_GTI_MK1/datalog200705062004.xls When running pin 5 on LM1815 open it gets triggered by spikes/noice at hi rpm. http://www.vems.hu/files/HansK/Swift_GTI_MK1/datalog200705072004.xls In both cases it gets worth with longer (you mean shorter?) dwell time.. when runnig 1.5ms dwell the problem is almost gone, but it looks like the dwell-time originally is rather long! (1:10 probe) http://www.vems.hu/files/HansK/Swift_GTI_MK1/IMG_1820.JPG * Is there any thing I should have in mind if I'll try and chance C30 to chance the filter ? ** changing RC might help a bit '''Other ways to improve the trigger-signal''' * Is that really a VR sensor ? ** waveform looks like a HALL (but with too weak pullup) *** Yes it looks like a HALL-signal! Before I did the messurement above I just assumed it was a VR because of the 4-tooth trigger-wheel. ***Originally there is two wires to the trigger, like a VR, but one is +12V and the other goes to the negative pole on the ignitioncoil, and to a "noice filter" form where the RPM signal goes to the box. I have then disconnected it from the negative pole on the ignitioncoil and uses the RPM-signal to VEMS. * what primary trigger pullup do you have inside the box ? ** R30 Pullup resistor is not mounted because I thought it was a VR-setup. * pull the input to GND with a known resistor appr 1kOhm value, and measure input DC voltage. ** shouldn't I try to mount R30 (10kOhm) first if it is a HALL sensor? * what is the measured DC input voltage? ** on pin-27 without the trigger mounted or what? ------------ MembersPage/HansK Optional: Add document to category: Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.