Well Guys, I am about ready to close out this thread. The engine has been rebuilt, reinstalled, driven and the valves adjusted twice. My last item was to check the fuel map and ignition settings (I run the SDS digital engine management system) on a dyno at the local racing shop. After the first run, it was obvious why I burned the pistons on the track; the engine was running too lean, about 14+:1 under boost. After some adjustments, the fuel/air ratio is now about 12:1 with the ignition retard pulling the advance down to about 20 degrees BTDC. One of the items that these runs showed was that my supercharger belt was slipping above 4,000 RPM. The supercharger maintains a boost of about 6 psi until 4K and then it drops to about 4.5 psi. I should be able to fix this by having a machine shop lower the lip on the pulley so that I can fit a shorter belt (it is loose).

In third gear, it pulled 174 HP and 180 FT-LB of torque. This is a solid 40% gain over the baseline runs on the same equipment in October 2001. You can see the graphs of the air/fuel ratio and boost pressure on the bottom of the dyno plot. It is not a monster like Donnie's but it is a very peppy daily driver.

Donnie .... Thanks for posting your fuel map on the site. I used your ignition retard values and my dyno guy said that they were "right on".

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"