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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: '''2.3L audi 5cyl 20VT audi for drag racing''' Engine is built to >800 Hp specs. A similar engine measured on engine dyno reached: 976 Hp at 375kPa @ 8000 RPM. We'll see. ---- '''Trigger''' 10+1 trigger, that is * primary trigger: HALL 5 pulses on crank ** trigger_tooth=01 is appr 72 deg BTDC (trigger_tooth=00 would be at about TDC prev cyl, not good) * secondary trigger: HALL 1 pulse on cam See InputTrigger/MultiToothNoneMissing Engine is running with firmware 1.1.27 http://www.vems.hu/download/v3/ * V3GUI_ ... firm1.1.27 ** but firmware and temp tables are uploaded already, should NOT be needed * VemsMT1.1.27 prebta0 ** use to tune maps (12x12 highboost). Don't tweak trigger settings with it. ---- '''Injectors''' First running was with small injectors (from some Opel Monsa). Now running 1600cc/min low-impedance injectors, with 6.8 Ohm (50W) series resistors. Currently 36V flyback (30V transient + powerflyback). * is the the 0 280 150 846 injectors? ** I don't know the Bosch number I think the 1600 cc Bosch LowZ injectors do not work with 1.5 .. 1.8 bar fuel pressure: * we spent hours debugging why the sparkplugs are so different: some sparkplugs were DRY * ECU did well on the bench * I just got to know in the end they lowered the FP to get longer PW and better injection ** => Jorgen1_: I would expect them to have a bad spray pattern, what problems is seen. ** Jorgen1_ The usual big injector tuning is done? Never leaner then lambda 0.85-0.90 or so => no, it does not run well at 0.85, some sparkplugs are dry (and apparnetly not always the same??) * Isn't it the 4,9ohm injectors? ** I don't know, but series res = 6.8 Ohm 50W * We run them without series resistors. * Jorgen1_ Check if they are the normal 4.9ohm type and rip the resistors in that case. They will never work otherwise. ** we'll also have to apply proper fuel pressure ---- '''Ignition''' Now running with inductive ignition. (idles at 77kPa, around 800 RPM, big cams) It sounds like not all 5 cyls run at idle. (gets better at rev) * proper sparkpulgs will be installed * with the 5 big coils, dwell can be set higher, to 4.5 or even 5 msec. Finally it will use CDI ignition. 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.