[Brillig]

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.