Regarding chips, I ve been told since I have a big turbo or cam, I need a special “big turbo” and/or “big cam” chip. How does one of these differ from a “normal” chip?
A big cam/turbo chip is a misnomer. There may be some minor tweaks such as raising the idle to cover up the lopey idle of a big cam, and some additional fueling thrown in under PE to account for the increase in air that is compressed into the cylinders by a larger turbo, but that s about it. If you can call such changes a “big turbo/cam” chip then we suppose it s justifiable. We re sure we will have disagreement on this point, but these are the facts: The Turbo Buick is not a speed density calibration (MAP based), it is Mass Airflow (MAF based). Yes, we agree with a MAP based cal a special “big cam” chip would be necessary to compensate for the different vacuum conditions on the MAP that a big cam imposes. Fueling is directly related to MAP readings, so a big cam s effect on the MAP definitely has to be accounted for. However, this is not the case for a MAF based system as it is measuring the exact mass of air that the engine ingests. No matter how big or small the cam is, it still mea
