Search RomRaider





  • View Page
  • Page History/Versions
  • Print Page

Tuning Fuel

Tuning Fuel

  • Difference between AFR and Lambda
    • lamda is the same for all fuels not just gasoline
  • Stoich Mixture for Cruise 14.7:1 AFR
  • Dangers of an Overly Rich Mixture
    • cylinder wall wash
    • oil contaminated with fuel, reducing lubrication properties
    • High Egt’s
  • Dangers of an Overly Lean Mixture
    • detonation
    • destruction of internal components
  • What to Tune AFR at?
    • 12:1 is a good power range (prone to det)
    • 11:1 more reliable (10.5:1 to 11:1 for TMIC, 11:1 to 11.5:1 with FMIC)
  • AFR Target for Fast Turbo Spoolup
  • More or less power with leaner/richer mixture?
  • Comparing Dictated AFR to actual measured AFR with wideband
  • Don’t use factory o2 sensor!! Need Wideband!
    • Narrow band o2 reading is only .4v variance to show Lean or Rich
    • Factory (narrow band) o2 not precise enough to give a decent reading, let alone rely on for tune
  • Adjusting for Intakes
  • Choosing Injectors
  • Adjusting for Injector Size Change
  • Injector Latency


RomRaider Forums

Join our forums, the best place to find help and answers!


RomRaider is developed and supported by volunteers working on their own time. To support their efforts please consider making a donation.

Page last modified on April 20, 2007, at 08:49 AM
Powered by PmWiki