[markweatherill]

Hi,

I have a little Mitsubishi 'i' car with a 660cc turbocharged engine. I discovered the intake piping has, at its lowest point, an opening with a rubber flap that opens outwards and would act to let water out, if any got in. Otherwise it's shut.
I removed the flap and put some speaker cloth over the opening to stop dirt ingress. Now the engine can breath in through that opening. I wondered if I'd notice any effect, as the opening is only 2cm or so wide, and I do see that on the overrun, the engine is pulling a slightly higher vacuum.

EDIT:
A couple of days later I noticed that the vacuum on overrun was the same as before this 'mod'. So I think it was an unrelated effect of the weather or something.