rapsux2000 wrote:If I just put in the heads, and make no other internal changes I should be okay? I'll be using an Apexi Safc2, catback ehaust, but that's all. If I get a 7psi pulley, what else should I do to protect the car?
If you're running a stock, or even 5.5 psi pulley, you should be fine even if you do nothing else besides adjusting the fuel delivery using the S-AFC2. However, if you go with higher boost, you'll probably be doing yourself a favor by doing something to increase fuel delivery even further. Bigger injectors would probably be the best alternative, and possibly increasing fuel pressure. Also, think about getting the JPP headers and exhaust, as they'll remove all the restrictions from your exhaust system that can add backpressure. In addition, it's been documented that they can add 30 whp, so they'll maximize the benefits of all your other mods.