Q. I believe that using long duration cams and fairly short inlet tracts makes MAP readings erratic. Is this indeed the case and if so can I use the TPS for load reading ?
Yes, alpha-n is supported. I think digital averaging (suitable analog filter might decrease MAP speed) of MAP would help. Speed-density is really superior to alpha-n. As long as the WBO2 works perfectly (sensor said to wear after 120000km, we have no good own statistics though), should be little difference though...