Reply With QuoteGood posts here and some good discussion. The important thing to remember about electronicaly contolled engines (ECM) is that its the engine as a system that makes the power not the ECM (computer) or its program. If you don't have the right parts, ie. heads, cams, manifolds,etc, there is no real way to make more power unless the stock ECM program is so bad its cutting back power. Most of the time thats not the case, the ECM is programmed to provide a certain amount of fuel and spark timing based on how efficient the engine is using fuel and timing and its trying to keep the air /fuel ratios around 12.6 to 13.2 to 1 under loads over most of the rpm band. You could change the program and add more fuel and timing at certain points, but unless the motor can efficiently use the extra fuel and timing it can actually make less power with more. These systems are really speed density type of systems and unless the actual engine is modified with better breathing and efficiency no more power will result and possibly less can be made with program modifications. The reason our kits make so much more power with the same ECM programs as the 496 was set with stock is that our engine parts have the engine breathing and burning its fuel about 23% more efficently than the stock engine did. the ECM's have enough fuel and timing tables already programmed in them that when the engine is running so much more efficiently the various manifold pressure sensors, air temperature sensors have different readings than they did at the same rpm on the stock motor and hence use a different fuel and timing table which provides the corrected air fuel mixture, and because the engine is burning a denser more powerful fuel air mixture it is making more power per cubic inch, hence it has what we call a better volumetric efficiency. The air fuel ratios still stay between 12.6 to 13.2 to 1 but the power produced is substantialy higher, because the egine is so much more efficient. If you take the approximatly +23% better efficiency and add that percentage increase to the stock power of 425HP which is about 100 to 110 HP which is about exactly what our kit produces over and above the stock motor. Its not really rocket science or a black vodoo, just good engineering and good parts.
OK, class dismissed. Have fun!!
Ray @ Raylar
Hey, this Ray guy sounds pretty darn smart !!!
So what about an ECM with a top RPM of let's say 5,400 and a little advanced timing and spark ??
