_      
 | |     
 | |     
 | |     
 | |____ 
 |______|
         
         

  _  __
 | |/ /
 | ' / 
 | . \ 
 |_|\_\
       

  _    _ 
 | |  | |
 | |__| |
 |  __  |
 | |  | |
 |_|  |_|
         
         

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

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

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:
'''Nitrous control''' As many of us using big turbos (especially me :), it's a good idea to spool it with nitrous injection. Unlike with other technics (launch and ALS), I'd like control it a way to stay in traction which is much favourable in street conditions. My first idea is a dry kit with PWM-able solenoid, like this one: http://www.noswizard.com/product_desc.php?id=6 Interesting part is controlling such a system with VEMS. I thought a pwm reference table similar to current boost reference table logic, RPM and KPA for axis, and duty for values. --- Existing logic is probably OK to switch configs when N2O is on or off, to handle ignition change (and fuel?) Or alternatively if this is hand-in-hand by nitrous volume (rated by pwm duty) a simple config value is enough information to add extra fuel(?) --- AFAIK this is not common in other (big brand) ECUs, so it might be a good idea to take advantage and give support for such an advanced (and cheap) control possibility. --- '''Sizing''' Based on existing measurements I can achieve 0.8-0.9G acceleration with warm tires but excessive wheelspin, maybe it would be slightly more with a 5-10% of slip. Here's a power chart of a first-gear run with launch&wheelspin (black) and with simple acceleration (red): http://quasar.dynaweb.hu/~lezsi/vems/n2o/hp-curve.png (Time differences between the curves are scaled) Based on the blue area, I'll need a maximum of ~70Hp "shot" of N2O. For a test-drive open loop boost control with ref table (RPM, kPa) is usable I guess, usage frequency of the solenoids ("Pulsoids") seems 8-50Hz. --- '''UPDATE''' july, 2009 New firmwares (like 1.1.56) have experimental N2O control to switch a simple solenoid and some correction in fuel+ignition. This is fine for an ordinary one-stage system, but it cannot control more stages or the finest PWM-based systems I described above. Write your thoughts here!
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.