how much power can the stock TII ports on a s5 Jspec handle?

 

little over 560whp seems to be the most documented so far that I have seen.

 

sick i have nothing to worry about. im only shooting for 400.

 

Jspec or not, as long as the motor is nice and strong it should be able to get 400 plus on a nice big turbo, and air cooling.

I believe ports are the same between jspec, and us spec.. So if this is japan junk motor fresh off the pallet.. I wouldn't try to push to much out of it.. just get it rebuilt and then up the boost. No use destroying a good core.

 

FYI they are identical.