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Regina is all MAP. The TPS is almost identical to the Bosch LH switch: closed, open, WOT.
Hello I live in Volvos homeland Sweden and I have workt with and own Volvo my hole life. It's Swedens most common car. For knowledge so had every 740 sold here in Sweden 91-92 Regina and even some late 90's. No 940 had Regina here.
I have been collecting parts for a while now and will be doing a Regina + T over the week of the 4th of July. I have multiple options I will be examining (larger injectors/FPR/cold start injector/piggyback) and I will be testing all and seeing what works best. I even have some GM maps sensors I will be trying out. Big thread coming soon
I have turbocharged my Regina 91 Wagon and it has been running nicely now for a few hundred miles (no voltage clamp or anything for the map sensor, its happy). I am running 850 orange injectors and a 3 bar FPR. Air fuels are perfect. I plan on upping the boost soon
Regina +T (Mitsu 13c) is running pretty well.
Using 280155759's (30lb, '98 V70 LPT) adjustable regulator set to just under 3bar. Wastegate set with no pretension on the rod.
I have a WBO2, and it was clear that with stock injectors @ 4bar there was a nasty lean area at throttle tip in under light load/boost onset. That is gone with the larger injectors. Had to run the engine around 2K rpm for a few minutes after initial startup before the adaptive compensated & AFR's settled into the 14.7-15.2 range at idle.
Which adjustable FPR did you use, and pic of install?