Stock injector are good for roughly 310whp N/A. You should get some stock GTR injectors 570cc's so you rev it to 7k.

 

Great info! thanks, but wouldn't this be seriously short sighted on a stock block? I've read the connecting rods are the weak link and 400hp at the crank or just above is about the limit they can take.

 

Hp, isn't what kills engines it's tq. As long as you have taken care of your engine you will be fine with the 3.12.

You should be somewhere around 350wtq with the 3.12. But just for safety reasons you should upgrade your injectors it's always better to have to much injector than not enough.