Well, I am probably going to wait until the end of the month to give this a run. We've been having some nice weather here and I don't want to put my car down until I can't drive it any more, once it starts snowing.

I need to check and make sure my fuel pressure is good before and after I go with higher boost. Using the boost a pump it should be fine. I'm don't think there are many people running mid to high 400s on the returnless fuel system yet, on the 06+. I hope it holds up ok

 

Paxton lists the 1220 and 1220sl as macing out at 5300rpm or 17psi. SOS has a different crank pulley you can get to up your boost. That special pulley and a 3.0 blower pulley nets 17, or just a bit more than 17psi on the dot. I wouldnt upgrade to the 1200 blower until you have reached your limit with the 1220.