S60R/V70R 2004- Performance air filter kit. The performance air filter kit replaces the original air filter and air filter box in order to make the air flow go as straight and as simply as possible into the engine. Cold air - being denser - shows improvements in power over warm air drawn from the engine compartment.
|Quote, originally posted by jdog »|
|It's because you don't have the filter contained in a box directly connected to the intake piping, thus exposing it to the hotter engine compartment air. Right?|
after looking at picture and reading statement in bold...
zigger, you would have been better off with a J&R/BMC high flow filter and one of the supplemental air box feeds.
The problem with that set up is your are still only getting 12 sq in of cold air from the front intake, which is not enough to feed even stock turbo boost. So, while you may have a filter that can suck in lots of air, the only other place that air can come from is out of the hot engine bay. Hence, if you measured, you will find that you now have hotter intake air temperatures.
So, more air, but hotter, so probably a loss in power, especially when starting from a stand still, where engine compartment (and all the air around filter) will be very hot.
Something you could do is add something like the CAI that Jim Lill inspired, that would blow more cold air directly onto bottom of filter. You would still have heat soak issues from a standstill, but would have two sources of cold air blowing directly onto your open air filter.