Allan, Check out the race red ECU (http://extremeesprit.com/Perf__Mods/Racing_ECU/racing_ecu.html) direct from Lotus (not the hi torque), its 450HP out of box and a direct swap. They make you sign a waiver saying something to the effect that if you blow the cylinder heads off its tough shit as we told you so! Still, its an easy 100hp for 20 minutes work (also handy if you know a double-jointed midget to get the thing in and out) If you're interested, try Harry Appleby at Viking motorsports, he's one of the primo Esprit guys in the country 714 979-1020
Another good site for for ECU's, flowed turbos, BOV's, intercoolers tranny coolers etc http://extremeesprit.com/Perf__Mods/perf__mo tds.