##  ##  
  ####   
   ##    
  ####   
 ##  ##  
         

 __     __
 \ \   / /
  \ \ / / 
   \ V /  
    \_/   
          

  ___  
 / _ \ 
/ /_\ \
|  _  |
| | | |
\_| |_/
       
       

         
 ######  
## ## ## 
## ## ## 
## ## ## 
## ## ## 
## ## ## 
         

         
|\     /|
( \   / )
 \ (_) / 
  ) _ (  
 / ( ) \ 
( /   \ )
|/     \|
         

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:
I contacted Mattias about setting up VEMS on my BMW 535 (E28) on which I have a twin turbo setup. More information here (in Swedish): http://www.535twinturbo.com/ I previously ran with SMT6 but that was just crap. '''Engine information''' * Mostly stock M30B35, a 3.5 litre 6 cylinder even-fire inline (not odd-fire V6) engine with ~210 hp N/A with stock engine management * 2 x Garret T3 from Saab NG900/OG93 * Custom exhaust manifolds * 2 x EGT K-type thermocouples in the collectors * 6 x 380 cc/min @ 3bar high impedance injectors * Single coil and distributor (for initial setup, direct-fire setup might come later) '''Trigger setup''' The stock reference and speed sensor are not useable with VEMS as far as I know, these are mounted at the back of the engine. One measure engine speed through 360 teeth, the other syncs with the engine once every revolution. So it's kind of like a missing tooth setup - only it isn't. The solution that will be used: Three M8 bolts will be fastened to the harmonic dampener at the front of the engine, 120 degrees apart with 8 mm protrusion. A Honeywell GT1 Hall sensor will be used to sense these. * Proper tdc_delay has not been set due to misunderstanding settings * ''tdc_delay'' should be 60 degrees before TDC * Crank advance must be set to 0 to align the TDC marks on the engine/crank * Will report back on the correct ''tdc_delay'' within a day '''Assembled v3.3 controller wishes''' * '''both primary and secondary trigger inputs should be of HALL type'''. * MPX4250AP 255kPa MAP sensor mounted onboard, with frontplate mounted 6/4mm pneumatic connector. * Serial RS232 is usually EC18pin14 and EC18pin15 (can be DSUB9 if you insist) * LCD through frontplate * PS2 through EC18 * 2 x AD597 chips (normally they have to be added to the order and mounting is free ** 2 x compensational cables through the frontplate, flying loom style ** 2 x K-type female chassis connectors (mounted by me) ----- '''050926 - Problems of the day''' '''SOLVED - Switched Polarity''' * EGT sensors dosent work, just show 16c when engine off, and when engine ON it jumps between 16c and 60c Is it just switched plus and minus or what? ** Switched polarity have different syndromes. Check ohmage (or voltage during operation) between the sensor wires and GND (should be near 0 Ohm and 0V) '''SOLVED - fuse didnt have 100% contact whit the cabels''' * Lambda act a little strange and unstable, yesterday it work perfektly but tobay it just "freezes" at like AFR17.95 ** publish config, and preferrably the relevant LCD page too (the page that displays nersnt and Ri). Maybe capture the output of "perl bin/wbo2log.pl :COM2 mde02" ''my config is at http://junk.535twinturbo.com/terminal_senaste.log'' ----- '''050928''' *Now the engine fires up om the priming fuel, and then dying instantly after that. I´ve tryed the reg_fuel value frpm 1.0 to 10.0 and the "VE Table" 30% all over, but nothing can fire my engine up anymore, sparkplugs looks fine and are not completely fueled up. ** Have you checked secondary trigger settings? one of those settings has to be 02 when not used.. *''Does it often hapens that configs chenges when voltage drops verymuch? ** If you board resets while you are in another view in megatune, and change it, MegaTune can ruin config: See GenBoard/UnderDevelopment/FirmWare/Settings. So make sure to exit all views (main view with gauges is safe) when you are cranking and are low on power.. //Emil ** Upload the config settings that I sent you initially, that will remove any doubts about variables that MegaTune may have altered to strange values. The secondary trigger setting is probably not the only setting that changed. //Mattias We are working on a workaround to stop MegaTune trashing config - even if the board resets.
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.