Originally Posted by 02Toyowrx
A turbo will help you ALOT..
8cm2 18G should provide enough airflow for a flat tourqe curve to 6500+ rpm's then slowly start to taper.
STI chamber should measure out to 52cc's, so your wrx heads have about 6cc's worth of volume taken out of them.
What "static" compression are your pistons designed for, and for what heads?
.. Or are they stock STI pistons?
i switched to a 7cm2 TD06-20G in other words a FP20G.
i took a lot of material out of the heads. a LOT. I used to build small block chevys, and i know what a good port job on the heads is worth.
the designed compression of the pistons isn't important.
they are off teh shelf weisco's for an STi, so i am running just on the high side of where they are supposed to run. they are made for STi heads.
given the design of teh pistons, i have no compunctions of running them to 24 pounds of boost, a crap load of timing and beign pretty aggressive compared to stock hyper cast slugs. the ring lands are uber strong, and i think that the pistons will be pretty far down the failure chain. in otehr words, i am not goign to break my psitons before i have catastrophic failure somewhere else int he motor.