Fuel testing

June 24th, 2009
Blend F Post Interclub Race Meeting.

Blend F Post Interclub Race Meeting.

  1. Record Fuel temp and ambient temp settings
  2. Allow engine to idle for one minute, record temp
  3. Outlap tuning 3-5 laps – adjust top and bottom for moderate performance and record +/-
  4. Circulate on track until sterady performance maintained
  5. End session, record top engine temp.
  6. Kill engine return to bench, 1 minute post engine test record temp.
  7. Emmission rating
  8. Performance rating
  9. Repeat

Track test results

Fuel Control Blend A Blend B Blend C Blend D Blend E Blend F
Idle after 1 minute 60 65 67 60 70 68 73
Idle screw degrees 0 0 0 -10 0 10 0
Idle mix degrees 0 -20 -20 -10 -10 -10 -10
Top needle turn 0 -10 -20 -30 20 20 10
Top temp 0 100 110 110 105 105 115
Post bench temp 90 81 92 81 85 78 80
Emmission Good Good Good Less Little Little Little
Performance Good Cool runner Good bottom Better bottom Fast and racey Better bottom Nice all round

Race test results – Blend F

After run examination showed red oil residue that did not coagulate with Mugen after run. Engine was subject to relaxed maintenance procedures and Glow Plug problems on race day account for poor combustion evidence on piston.

The fuel was applied in a working race environment for a one day 3 heat sprint event. Engine required very little tuning and climate was constant, minor adjustments responded positively. Engine ran within safe working temperature range and acceleration was good throughtout the rpm range. Less smoke than normal, though engine was not lean, good run time and good overall blend and should be given good consideration.

Blend D – Club meeting results

BLEND D was taken out for an evening gas touring in the TG and performed well in comparison with other TG’s on track. Engine was kept on the rich side to measure cooling and held managable idle with a very cold plug. Engine maintained tune throughout the evening and engine temp was cool. Post meeting engine review showed little residue and no coagulation with Mugen after run. Good all round blend, suitable for recreational and competitive use.

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