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In Reply to: 850 performance chip posted by Jeff on March 18, 2001 at 09:22:54:
An additional two cents worth about the Jim Conforti "dyno charts".. the '94 850CSI chart is accurate and conventional in it's display of information, but the chart for the '92 850i is confusing in it's graphical layout. On most dyno charts (like the one for the CSI) the HP range, and the Torque range, are equal. Ie., max hp on the left side of the chart is 350, and max torque on the right side of the chart is 350. The torque/hp MUST INTERSECT at 5252 rpm, on this type of chart. The graph for the '92 850i indicate torque/hp intersection at 4900 rpm. Looks bogus at first glance, but because the hp range, and torque range are UNEQUAL on either side of the chart, who knows for sure? The formula for hp is torque x rpm, divided by 5252, thus the curves cross at this rpm. The overall percentage of improvement shown may be correct, but because of the confusing layout, you (I) do not know if the torque/hp is correct at any given rpm. This chart shown should be redone and reposted just for clarity.
Sorry for the rambling. To sum it all up, everyone here seems to highly recommend the chip change. I'll even be buying the Conforti chips myself, soon. Just wish they'd edit the darn dyno chart...!
Randy H.
91 850i
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