I have comp Titanium Valve springs on the motor and replace the Valves from the factory sets and have a port page done to the PI heads. the boost meter is showing 9PSI when she was ran on the dyno I do have a smaller pullie Allen set me for free its a 2.40 inch pullie said I should see 11-12 PSI with the pullie but said with the timing set as it is I wouldn't see much pickup with out adding timing to it. I mean 327HP and 370FTLBS troque at the wheels is not to bad given and with the UPR pro suspension and all I am sure the car would do well at the track it has nice ***** on the street and all but really would want about 420 so it would run well with a semi mods 03-04 cobra on street or track thanks for the info all keep it coming

 

Actually, when you add more boost, you need to subtract timing(retard), slightly, but
only if your timing was optimized. Leave the timing alone, until you bumb the boost;
you may find part of your problem was the curve was over-retarded, and, when you
increase the boost, it may be just right. As far as titanium valve springs on a street
car go, you better make sure you check their tension after about 5000 miles, and every
5000 afterwards.

 

As far as timing gos Allen say when they flash the computer, when you add more boost there program is setup to keep settings about where there were no matter how much boost you add they said I would having send the computer to them or get a chip or a Steeda timing kit so when I add the new pullie it will change the timing boost other wise adding a new pullie will give more boost but will not pick up much becuase the timing will adjust in the computer to be setup for 9PSI not the new 11-12 with the smaller pullie.