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Hondata, Inc.
2840 Columbia St
Torrance, CA 90503

  • The purpose of this tuning exercise was to see what power a basic JR Supercharged Type R would make with the correct ignition and fuelling. After the baseline run was done, the rising rate regulator was removed, the ignition timing returned to stock, the MAP sensor was relocated to see boost, the air temperature sensor was returned to stock operation and larger RC 440 injectors were installed. Fuel pressure was set to 50 psi by using a B&M FPR ($55). Injector duty cycle reached 75%. We are not sure if the fuel pump was stock, but we are sure the stock fuel pump would have been sufficient at the lower fuel pressures.

  • After 4 dyno pulls we had 200 hp. VTEC was lowered to 5000 RPM giving a 13 HP increase at 5500 RPM. The remainder of the dyno runs were mainly dedicated to tuning the part throttle tuning and making sure detonation was eliminated. Cam timing was advanced 4 degrees. While this is good for a NA car, we suspect returning it to zero will perhaps gain 5-7 HP at 9000 RPM. This is a low boost engine with a big pulley. We were looking for a smooth torque curve and are happy with what we achieved. Part throttle response was much improved, but not shown on this chart. Below 3500 RPM a little more tuning is necessary. We suspect we may have retarded the ignition under boost a little too much.

  • Intake temperatures were interesting. While on the dyno intake temperatures were around 145-155 F rising to about 167 F. After the run, the intake temperatures continued rising. This setup would really benefit from bypassing the throttle body heating, bypassing the IAC heating and installing a heatshield gasket. More boost will probably heat the intake charge more.

  • This engine is now set for instaling a smaller pulley for more boost. We can still use the stock fuel pump, and would probably only need to raise the fuel pressure by about 5 psi.

  • At the higher boost levels JRSC customers spend a bit to get their systems functioning well. The Hondata install costs about the same, is far simpler and works much better. Check out a cost comparison and pictorial install here.

 

 

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