Why cant I get the Engine Analyzer to match the factory torque and HP ratings for 1960s muscle cars?
Unless you have the actual curves and know how the engine was set up, it is difficult to know exactly what the factory was doing. In the “old days”, the factory would put on headers, block the crossover, change the spark and fuel curves, run open exhaust, etc, etc to get “factory ratings”. This changed around 1972 when power ratings suddenly dropped. You’ve seen the “heads up” comparisons between old and new production cars in recent magazines. How else is it possible for modern 300HP Corvette to “blow the doors off” a 1968 425HP Corvette. Also, if the factory marketing department wanted to “push” low RPM torque, they would simply pick a low RPM point off the torque curve, even if it was not the peak. In addition, dual plane intake manifold tuning is difficult to simulate accurately. Some of these engines could have made more low end torque than the Engine Analyzer program estimates.
