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30-70 runs using standard chip: RPM>3000 shown (after BSV kicks in).

30-70 runs using standard chip: Shows 8 different runs with 2-1/4” s/s exhaust. Run no 8 selected as typical. Standard exhaust runs with standard chip and V3 Everest shown for comparison. 30-70 runs using standard chip: RPM>3000 shown (after BSV kicks in).

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30-70 runs using standard chip: RPM>3000 shown (after BSV kicks in).

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  1. 30-70 runs using standard chip:Shows 8 different runs with 2-1/4” s/s exhaust. Run no 8 selected as typical. Standard exhaust runs with standard chip and V3 Everest shown for comparison.

  2. 30-70 runs using standard chip:RPM>3000 shown (after BSV kicks in). Shows 2-1/4” s/s exhaust run no 8 to be faster than 3 typical standard exhaust runs.

  3. 30-70 runs using standard chip: • Standard exhaust gives flat boost of 0.6 bar. • 2-1/4” s/s exhaust shows incipient overboost (after 5 secs). Doug’s large exhaust shows the same effect (using standard chip with no mbc). • Doug’s mbc & Everest V3 boost using big exhausts are shown for comparison.

  4. Event 2 discarded (unknown error by me). Curves for standard exhaust with standard chip and V3 Everest shown for comparison. 30-70 runs using Everest V3 chip:Shows 11 different runs with 2-1/4” s/s exhaust. Run no 3 selected as typical.

  5. 30-70 runs using Everest V3 chip: • V3 Everest with 2-1/4” exhaust gives best performance of combinations tested. Doug’s mbc boost shown for comparison. • The incipient overboost seen using standard chip with 2-1/4” exhaust is absent using Everest. (Doug’s car confirms this effect). • Notchiness of the boost curves seen at 56 mph (2900 RPM) in these development chips has been resolved for production Mountain chips.

  6. V4 Everest overboost points owing to control issue - corrected in production chips. Notch in curves @ 2900 RPM where BSV kicks in is smoothed in production chips. • 30-70 runs using different chips: • Standard exhaust gives flat boost of 0.6 bar with standard chip and well-controlled boost with all chips (except V4 Everest). • 2-1/4” s/s exhaust shows drifting overboost above 4000 RPM with standard chip, not seen using Everest V3.

  7. 30-70 runs using different chips: Data points plotted above 3000 RPM (after BSV kicks in). Conclusions: • Straight line regressions through data points show excellent correlation (R2) and differentiation of chips. • 2-1/4” exhaust shows better acceleration than standard exhaust (for both standard & Everest chips). • Standard chip with 2-1/4” exhaust overlies trend of Everest V3 with standard exhaust. • Everest V3 with 2-1/4” exhaust overlies trend of Everest V4 mental chip with standard exhaust.

  8. 30-70 runs using different chips: • Data points plotted above 3000 RPM (after BSV kicks in). Doug & John_W data. • Best is Everest V3 with 2-1/4” exhaust. • Close second is Everest V4 mental chip with standard exhaust (not tested with big exhaust).

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