Is anyone doing a hot air intake vs cold?
 

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

Just about everyone here almost.

Refer to archives. Search with keywords

Thanks!!!

YAris comes stock with a pretty hot intake lol

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.

I get 10-15% more with hot air, especially in winter

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.

Intake restriction often improves torque. And FE too I think