2000vsm

I'm taking off the turbo, I wanna know if i can just run my 450cc with stock? Well I know and still remember the OBDII on my d16y8 runs in closed loop mode (I think you call it that) which means it takes reading etc from sensors and the settings on my SMC don't affect. Few times the charge pipes blew off and I had to drive a bit like that no turbo pressure inside the engine so like stock, no probs. Prob I 'm worried is during 100% throttle it'll go into the open loop mode (or w/e) which reads premap settings stored in the ecu and also the SMC settings will apply then. Is there a way i can adjust the SMC so to keep a stock map with 450cc at 100%TP? I don't have time or want to go to the dyno to AF tune it etc. (SMC is something liek the VAFC hack)