A performance exhaust is always going to be louder because the only way to really increase hp though the exhaust is to decrease unnecessary back pressure which, therefore, inherently increases noise. I don't think MB is advertising any performance/hp gains from the upgrade. I believe the major difference is aural. If you don't want a louder car then don't opt for the upgraded exhaust.Anyone knows the function of Performance Exhaust to the engine or any other effect to the mechanical? I really don't care about the sound. I like more quiet engine because I hear the noisy in the lab everyday.
Of course, MB is professional, I know that. I don't need to concerned about the reliable or even the undiscovered long term problem. These won't be the problems of mordern tech, especially for the MB. What am I thinking is how much hp left in 100F and the compression efficiency of the compresser in 100F. I work with the jet engine and I konw the temp will be a big problem for jet thrust, but I am not sure with the interal combustion engine. My friend had tested some auto engine with turbo, the temp seems to be a problem also. MB gives us the hp of the engine, but they doesn't show the engine gives the power in what condition.My guess is that the change in back pressure isn't that great and that the AMG engineers are comfortable with its effects. Remember, MB isn't a bunch of 16 y.o. kids with too much money, too much time and not enough skill to start playing with an engine. I don't think they want to start replacing engines any more than we want them replaced. They have a vested interest in making sure the cars are reliable when they reach the streets.
Also, just like every modern car the CLA went through countless hours of extreme hot and cold weather testing. I wouldn't be too concerned about the effects of CA heat on the engine, turbo, etc. It's certainly possible that there's an undiscovered long term problem just like with any new engine but my guess is that if something does come to light it won't be linked to external temperatures.
Two inter coolers actually one up front behind the grill and one in the front wheel well.you do realize this engine has an air to water intercooler right?
??????For the intercooler, I don't find any information about it from MB. I am not sure if this engine has it like the GTR has it. The only inforamtion from MB I had read is M133 has a more efficient (20% more) cooling systerm. I don't know this systerm is for the cylinder cooling or intake cooling. My guess is this engine doesn't have intercooler, because it has only a single-stage compressor, it is meaningless to put a intercooler after the compressor. The only way is cooling the air before it goes into the compressor. Anyone knows if there is a cooling systerm before the compressor in the inlet?