just got some triangle voo doo for free, ended up with a 13b turbo motor out of a second gen fc rx7. Now looking at this to power my vision when i build it instead of subaru power. Well anyways looking for advice on wether on a turbo motor if side ports are adequate or for aircraft use does the eficiency go up as well as hp when the engine is in p port configuration. asking because the money ill be saving getting an engine for free, and not converting a subaru im thinking about the aluminum side housings to reduce weight and help some with wear and cooling. with the side housings i have the option of getting them without intake ports for p port configuration. so trying to figure out what is best for power and efficiency.