Quote Originally Posted by WRX_STi
I think the biggest obstacle to going higher than 30 psi is still going to be the block. It is built, but it is not a closed deck block. It has upgraded internals but it is still semi closed. The main reason I went with it is because I know the weakness of the stock pistons not so much to make stupid power. I wanted reliability. To get into the closed deck motors of 2.5 or higher then you are talking double the price.
Maybe I will throw one of those semi closed decks together this week and see if I can break it. They say 30 psi is the limit, I think It will take more.

Since no, one else seems to have the balls to push it to its limits.(not directed at topspeed but to the subaru community in general)

Matt