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Why do turbo intakes sit in hot air?

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Old Oct 21, 2003 | 12:19 PM
  #1  
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Default Why do turbo intakes sit in hot air?

n00b question:

How come the turbo air intakes are usually sitting high in the engine bay, about where a short ram usually sits? Wouldn't that mean it's sucking in hot engine air as well? How come they don't design the turbo intake to suck from the cold air fender?
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Old Oct 21, 2003 | 01:54 PM
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because the air will be compressed and heated up anyways. whats the point of taking in cold air just to have it heated up again? the intercooler is there to cool the air after the turbo.
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Old Oct 22, 2003 | 08:30 PM
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Wouldn't denser air help out the turbo just like CAI help an engine? I'm sure the answer lies in the amount of piping. The benefits of colder air would deminish over the lenght it has to travel... or i might be full of shit on this one =)
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Old Oct 22, 2003 | 08:55 PM
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Originally posted by Snoopy
because the air will be compressed and heated up anyways. whats the point of taking in cold air just to have it heated up again? the intercooler is there to cool the air after the turbo.
You're basically right snoopy, but also think about this:

all the hardcore import FI dragsters have a their turbo inlet outside the vehicle...for example above the hood or a hole cut right into the bumper to force feed as much air as possible. They try to get as much velocity of the air going in as possible. Hence the colder the air the more dense hence more O2 molecules in the intake piping, through the intercooler, into the combustion chambers...

it makes sense and doesn't at the same time....I :dunno:

just my theory
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Old Oct 22, 2003 | 09:40 PM
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Originally posted by honda_pilot
You're basically right snoopy, but also think about this:

all the hardcore import FI dragsters have a their turbo inlet outside the vehicle...for example above the hood or a hole cut right into the bumper to force feed as much air as possible. They try to get as much velocity of the air going in as possible. Hence the colder the air the more dense hence more O2 molecules in the intake piping, through the intercooler, into the combustion chambers...

it makes sense and doesn't at the same time....I :dunno:

just my theory
nice way to confuse me h:
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Old Oct 23, 2003 | 10:21 AM
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haha, sorry...I guess it does sound confuzing...maybe I'm just wrong....
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Old Oct 23, 2003 | 10:22 AM
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It's just because of the new inlet location on the turbo. Can make it difficult to get to a good spot.
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Old Oct 23, 2003 | 07:19 PM
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Space is the biggest problem.

one option to help lower underhood temps is thermowrap....thats what i did

Boost Lee Turbo Prelude
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Old Oct 24, 2003 | 12:36 PM
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the air is intercooled anyway so what does it matter? and there really isnt too much space down in the fender. plus the turbo has to be close to the exaust thats what drives the turbo.
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Old Nov 13, 2003 | 08:07 PM
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um??? the filter is on the turbo so nothing can get into the turbo to wreck the turbo itself, like the fins, if a little rock hits the fins and breaks it.. well better find another turbo. so basically its there to protect the turbine and your engine
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