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Old 07-26-2009, 07:37 AM   #1 (permalink)
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Is anyone doing a hot air intake vs cold?

Hi, Is anyone doing a hot vs cold air intake and what are the results?

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Old 07-26-2009, 07:49 AM   #2 (permalink)
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Just about everyone here almost.

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Old 07-26-2009, 10:37 AM   #3 (permalink)
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Just about everyone here almost.

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Thanks!!!
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Old 07-26-2009, 04:34 PM   #4 (permalink)
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YAris comes stock with a pretty hot intake lol
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Old 07-26-2009, 10:56 PM   #5 (permalink)
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All 80s and 90s non turbo volvos have a thermostatically controller hot/cold intake that usually fails on the hot only side after 10 years. Fixing the intake to breath only cold air all the time usually nets 10-15% FE improvement as well as power.
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Old 07-27-2009, 07:34 AM   #6 (permalink)
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I get 10-15% more with hot air, especially in winter
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Old 07-27-2009, 08:18 AM   #7 (permalink)
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I'm working on a hot/cold 'switchable' intake to do A/B testing on my 93 escort wagon. I intend to do a/b testing for a couple of months ('full tank' method of measuring gas consumption).

Side issue - the air intake has a restriction before the filter, which necks down the air channel to approximately a 1" throat - it is part of a plastic channel which resembles a human 'stomach with intestine', with a large vacuum reservoir just after the restriction.

I removed this and see immediate improvements in 5th gear acceleration, pulling power. Less load on the engine with freer air supply is my guess.
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Old 07-27-2009, 08:44 AM   #8 (permalink)
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Intake restriction often improves torque. And FE too I think

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