Quote:
Originally Posted by Puerto Rican 335d
so youre saying TDi that having a cone filter w/o cover really doesnt affect performance.
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That's what the measurable data is showing.
I did leave part of the air ducting in place (the ducting above the radiator which pushes air towards that front passanger section). I also have a thermometer probe placed by the filter and it shows ambient air temps flowing into that section. If I move the probe to the back of the filter, closer to the turbo's, the temp is above ambient. But there's so much air flowing in at speed that the air temp measured after the intercooler isn't any higher than with the stock setup.
When you are idling at a stop, the IAT's do increase. But it did this with the stock setup as well (it's sucking air from right above the radiator which is very hot).