About psi
 

i was woundering if anyone knew approx. how much HP i would raise boosting my car from 8psi stock to 12psi... the car is fully stock and i want it faster atleast 300+ HP

Intake, 3" exhaust, 3" downpipe and turbo elbow along with a boost controller will put you right around the 300 mark maybe 10 or 15 more. Crank hp, not rwhp.

k so what u think that would cost me? ... and also... how much hp will i be around with just the 12 psi?

You need to replace the exhaust, especially the cat on the downpipe. If you don't I will heat up your engine bay more then I'd be comfortable with. Replacing the intake and exhaust will net you 8 or 9 psi without a boost controller. This will put you around 300 crank hp, 12psi on the stock exhaust will probably net you around the same, maybe less. I could be wrong, but I wouldn't chance it if I were you.

How's your headgasket?

Exhaust- $200-$500
Intake- ebay $40, a real one $100-$130
Downpipe w/ elbow $250 -$400
Downpipe w/o elbow $100-$200

$1000 should get you there, manual boost contollers are cheap too. Make sure you get an aftermarket boost gauge so you can moniter your boost level, the stock gauge reads to 8psi and is slow to react.

quick questions...with boost conrollers. can u manually change how much ur car boosts? can u get more than 8psi off of the stock turbo? and how do u install new gauges liek the pillars and stuff where do u run wires from?

and if any1 on here has a picture of what there boost controller looks liek on there car..can i please see a picture of it?

The wastegate controls boost on a turbocharged car. There is no boost controller stock.

Like kwnate said, theres no use increasing boost without increasing airflow.

You install an aftermarket boost controller inline with the vacuum line going to the wastegate.

I would install a mechanical boost gauge. 100% accurate and reliable. Electric boost gauges suck.

whats a good controler to get and whats the price range

Go to jscspeed.com and look. They have competitive pricing.

funds U.S or CA?