FATAZZ Posted April 13, 2005 Share Posted April 13, 2005 hey this has been bugging me lately, if u have a intercooler, y do u need cold air induction? Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/ Share on other sites More sharing options...
JCMarshall_Law Posted April 13, 2005 Share Posted April 13, 2005 No, but your car may spontaneously combust Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297619 Share on other sites More sharing options...
pinoi_boi_r33 Posted April 13, 2005 Share Posted April 13, 2005 the cooler can only take out so much heat energy from the charged air. the colder the air is to start with the better. Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297626 Share on other sites More sharing options...
FATAZZ Posted April 13, 2005 Author Share Posted April 13, 2005 can u explain how it will combust? the intercooler cools it down Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297628 Share on other sites More sharing options...
FATAZZ Posted April 13, 2005 Author Share Posted April 13, 2005 so aslong as my outlet pipe on my cooler is cold, but if it gets hot its not doing its job right? Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297632 Share on other sites More sharing options...
pinoi_boi_r33 Posted April 13, 2005 Share Posted April 13, 2005 no. it gets hot from the heat soak. ie from the engine heat. Yes this will heat up the air inside it. But very very minimally, since the air inside the piping is moving very fast, the heat from the pipes would not have enough time to heat the air inside. basically the colder the air the better. as colder air is denser ie. same volume but more oxygen. more oxygen the better for the combustion process. Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297639 Share on other sites More sharing options...
xRHETTx Posted April 13, 2005 Share Posted April 13, 2005 Ok, if the intake air with CAI is say 30 degrees, the turbo heats it to 60 degrees, the intercooler might cool it by 15 degrees say, ending with 45 degree air going into engine. If no CAI, the intake air may be 55 degrees, the turbo heats it to 85 degrees, the intercooler might cool it by 15 degrees, ending with inlet temp of 70 degrees. It wont combust Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297640 Share on other sites More sharing options...
riceline Posted April 13, 2005 Share Posted April 13, 2005 the cooler the air to start with the better. The Intercooler can only take so much heat out of the air. So by giving it cooler air to start with you make its job easier. There for it can cool the air that little bit more again over what it would be if you didn't have the CAI. Think of it this way. Hot air in > Intercooler cools it down but a section of the intercooler heats up. More hot air in > Intercooler cools it down. Bit more of the intercooler heats up. Less cool area for the airflow to go over to bring down the temp air temps. MORE hot air in > Cooler has been working so hard to bring down the temps for so long its now a heatsink. If you start with colder air you prolong this from happening for as long as possible. If you have a really good CAI it may never happen to you. Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297648 Share on other sites More sharing options...
FATAZZ Posted April 13, 2005 Author Share Posted April 13, 2005 cheers heaps fellas, ima go ahead with a few little CAI mods now:) Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297661 Share on other sites More sharing options...
JCMarshall_Law Posted April 13, 2005 Share Posted April 13, 2005 if u have a intercooler, y do u need cold air induction? The answer to your question is no, but CAI may help reduce inlet temps. The car spontaneously combusting was a joke, and Ok, if the intake air with CAI is say 30 degrees, the turbo heats it to 60 degrees, the intercooler might cool it by 15 degrees say, ending with 45 degree air going into engine.If no CAI, the intake air may be 55 degrees, the turbo heats it to 85 degrees, the intercooler might cool it by 15 degrees, ending with inlet temp of 70 degrees. It does not work like this, heat transfer is not a linear relationship. If you increase the turbo inlet temp by 15 degrees, the engine inlet temps (after the cooler) will not increase by 15 degrees. The higher the temp the faster the heat transfer, it is basic heat transfer theory. Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1297812 Share on other sites More sharing options...
xRHETTx Posted April 14, 2005 Share Posted April 14, 2005 The answer to your question is no, but CAI may help reduce inlet temps. The car spontaneously combusting was a joke, and It does not work like this, heat transfer is not a linear relationship. If you increase the turbo inlet temp by 15 degrees, the engine inlet temps (after the cooler) will not increase by 15 degrees. The higher the temp the faster the heat transfer, it is basic heat transfer theory. Yeah i know this but i was just trying to keep it simple to understand. Maybe i should have just said CAI=good, No CAI=bad. Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1300263 Share on other sites More sharing options...
HYPERTUNE Posted April 15, 2005 Share Posted April 15, 2005 The answer to your question is no, but CAI may help reduce inlet temps. The car spontaneously combusting was a joke, and It does not work like this, heat transfer is not a linear relationship. If you increase the turbo inlet temp by 15 degrees, the engine inlet temps (after the cooler) will not increase by 15 degrees. The higher the temp the faster the heat transfer, it is basic heat transfer theory. I was going to say the same thing. Guess I don't have to now. Link to comment https://www.sau.com.au/forums/topic/70244-cai-fmic/#findComment-1301431 Share on other sites More sharing options...
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