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cold air injection

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Old Jul 20, 2003 | 12:25 AM
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cold air injection

Cold air injection: How exactly does this work? I guess the theory is simple enough, cold air occupies less volume than warm air. Therefore, more cold air can be crammed in a cylinder than warm air. Bigger explosions result. But how is the air cooled? Is it being pumped into the cylinder somehow? If so , what runs the cold air pump? Does it run off the crankshaft or camshaft or is it an electrical device?
 
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Old Jul 21, 2003 | 04:11 AM
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cold air injection

I think you are asking about cold air _induction_.

Older carb'ed vehicles suck air from within the engine bay. This air likely passed through the radiator, and hence is warmer than outside air. With cold air induction, the idea is to run a hose of some sort to the front of the vehicle where it picks up fresh air that hasn't been heated up.
 
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Old Jul 21, 2003 | 12:14 PM
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cold air injection

Thanx, ludis! I didn't know this induction thing was so simple. Since I've got more questions than brains, I was wondering if you could also fill me in on the "intercooler". What does it do?
 
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Old Jul 22, 2003 | 12:27 AM
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cold air injection

You'd consider an intercooler if you have a turbo or supercharger. When air gets compressed, it also gets hotter. The intercooler is just a big radiator of sorts that cools the compressed air. Note that the intercooler at best cools the air to match the outside ambient temperature.

If you were making a run at a drag strip, you could use ice or something on the intercooler to get colder air, but that's only for a short time.
 
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Old Jul 22, 2003 | 10:37 PM
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cold air injection

Thanx again, ludis, appreciate it!
 
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