| correct -- to not consider rwhp or power at all .. more so look at engine RPM and EGT's only ... EGT's will indirectly map back to power anyway. I'm not sure that's the best way to look at it. You're leaving out some system dynamics that can increase EGTs exponentially, that result in absolutely no net effective increase in power. For example, increasing engine timing will eventually stop giving you useful power returns, while it will continue to increase EGTs. Power is a by product of heat. Correct. Creating work requires heat energy. Therefore the lower the EGT relative to the combusion chamber temperature, the larger the amount of work said heat energy has done. I thought it more relevant to look at this question in functions of heat and air. It seemed simplier for me to follow - does not mean its right though. The fact that you're saying higher EGTs = more horsepower insinuates an oversimplification that's fundamentally incorrect. Yes, EGTs are typically higher when the effective output is relatively higher, but you really want to tune for the lowest possible EGTs when tuning cams for instance. The more heat energy you convert into work, the more power you make and the lower the actual EGT (law of conservation of energy). It's something of a paradox. You want as high an absolute temperature as possible within the combustion chamber within safe limits, but then you need to convert as much of that heat into work as possible. So advancing the timing is good (up to a point) as it creates a more violent explosion, but you want to tune your cams to keep as much heat in the combustion chamber for as long as possible to get as much work done as possible. If our engines were 100% efficient, EGTs would be the same ambient air temperature. This is all in very general terms, but I trust you can see the fundamentals of the matter.
Recursively Yours,
Kenny...
PETZ Member #5
SteamyZ. Never had did me wrong. - SL103 07/06/04 11:58:15
|
