Dyno Results Vishnu Tuning Step-by-Step DYNO results (Procede+PWM Meth+Cat Deletes)
Vital Statistics
  • Vehicle / Motor
  • Dyno Type
  • Dyno Correction
BMW E9x M3 (S65 Motor)
Configuration (from Baseline)
  • Both CAT Delete
  • Vanguard TI CAT-Back Exhaust
  • 91 Octane (US), 95 Octane (RON)
  • 6-Speed Manual Transmission
Modification (since Baseline)
  • Vishnu Procede v4.x (with Custom Tuning)
Measured Results:
  • Torque
  • Horsepower
275 FT/LBS
371 HP
@ 3900 RPM
@ 8100 RPM
(372.9 NM)
(376.1 PS)
(38.02 KGM)
(276.7 KW)
Baseline Measurements:
  • Torque
  • Horsepower
275 FT/LBS
359 HP
@ 3850 RPM
@ 8200 RPM
(372.9 NM)
(364.0 PS)
(38.02 KGM)
(267.7 KW)
Performance Gains:
  • Torque
  • Horsepower
12 HP
( 0.0 NM)
(12.2 PS)
(0.00 KGM)
( 8.9 KW)
Dyno Graphs:

Excerpts from Article

Continued from this Dyno Database entry.

The next thing we did was to compare the stock tune (with the cat deletes) to various stages to Procede tuning. Without running methanol. It turns out that the reduction of exhaust back-pressure allowed us to be considerably more aggressive with the mapping.

First we simply enleaned AFR target (under heavy load) from 6500rpm and up. Basically increasing AFR from the mid 12:1s to high 12:1s. This is represented in the Red run below (Run 68) This got us gains of 6-13WHP between 6700 and 8000rpm. Next, we added 2 degrees of advance across the board (under load). This gave an additional 6-11WHP from 5700rpm to 8400. This is the Light Blue run below (Run 70). So through some admittedly pretty coarse tuning (and NO METH), we picked up a peak power gain of:

23WHP at 7500RPM

Stock tuning vs. Leaner up top vs. Leaner up top AND more ignition advance: