Tuning Reliability & Repeatability: An Example of Individual Cylinder Fuel Trims

Engine Management Systems (EMS's) gives the tuner ability to adjust fuel and engine timing as well as various other parameters, all in the name of creating the most optimized tune for your engine. A fine tuning procedure not often used or offered by tuners is Individual Fuel Trim Correction and Individual Cylinder Timing Correction. Fine tuning individual cylinders will result in peak performance, reliability and repeat-ability. For this write up we focus on the Individual Fuel Trim Correction.

Carbonetic // Hasport // CT Engineering - Diff Install for S2K

We recently performed a complete differential upgrade on a Honda S2000. Excessive loads brought by the aid of forced induction engines and/or harsh clutch engagement "shock" leads to bearing cap failure in these particular diff's. By 2004 Honda implemented a clutch delay valve inside the clutch slave cylinder to essentially reduce fluid flow, in turn reducing shock. Enthusiasts annoyed by this countermeasure were soon able to figure out how to disassemble the slave cylinder and remove this bleeder. All roads then lead back to the weak diff. The common failure point is centralized near the top of the bridge of the outside bearing cap. Our goal was to get to this particular diff and upgrade before it was too late.