Taken from a very reliable source :p
MB: FINALLY got to dyno the 52mm ITB's with good injectors. 210whp with the same curve as the 65mm Mustang TB. ITB's for the loss (in drag racing anyway). But interesting stuff anyway.

Me:glad they are finished... wonder wtf the problem is though. cant believe you are losing power with them. have you tried to consult a velocity expert on the situation only thing i can think of is that you are not running the right size tb's for your application

Someone::( The cylindrical area between the firewall and the edge of the stacks, is this area greater than the area of the TB? It probably is, but all those guys worried about proximity might have something going on, especially between each other where they are combating each other for air.

^this makes a lot of sense^

97 Talon ESi 14.943@91.35MPH N/A!
"If you need someone to provide an itemized build of materials and a flowchart to walk you through every build-related question you will need to answer at each step of the process, you shouldn't be playing with cars. "-Driggs