Dyno - 99 Civic Si

HEATSHIELD | S100 | S300 | REFLASH | K100 | K-PRO | FLASHPRO | TRACTION CONTROL

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Hondata, Inc.
2840 Columbia St
Torrance, CA 90503
 

  • (B16A) with a P28 OBD I ECU conversion tuned to gain 5 peak HP at 7500 RPM, 10-12% torque below 3000 rpm and an average of 3.5 hp over the whole rev range.
  • The engine was stock apart from a heatshield gasket and the tuning was performed on a dyno. The result of this surprised us. Normally the stock tuning is fairly close to the full potential of the engine, and there are no significant gains made by tuning fuel and ignition tables. Using a wide band lambda meter on the dyno we increased output by leaning the mixture at full throttle and richening the mixture at part load.
  • The biggest gain came from advancing the ignition timing below 5000 rpm across all load settings, and retarding the ignition timing at 7000 rpm for full load. Our feeling is that Honda has tuned the engine to run on a lower octane rating fuel. The same gains could not be made by increasing the base timing (by spinning the distributor) because the engine made more power over 7000 rpm by retarding the timing. The difference was noticable when driving the car, especially at part throttle and low rpm.
  • On the freeway we found the car would comfortably climb a hill in 5th gear where previously a change down to 4th was necessary. Tests were performed as accurately as possible on a dyno with the engine water temperature and intake air temperature at the same point at the start of each run.
  • We also installed RC 440cc injectors, re-calibrated the fuel trim and proved that the bigger injectors gave exactly the same output as the standard injectors with no loss in drivability.

 

 

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