What psi on this car?

I decided against the auto car i was gonna buy but i think i found a new one. I just have a few questions before i buy.
Heres the link:       http://www.autotrader.com/fyc/vdp.jsp?car_id=230812678
The owner is going to send me a list of all the mods on it but you can see some at the bottom of the page.

1. He said he had a boost controller with 3 settings. What the **** does that mean. I thought boost controllers just had a knob?

2. He only has 550cc injectors. What psi can i run with these? Should i buy bigger?

3. What about an estimate on the hp.

4. Is the only difference between the 16g and the 20g the turbo lag and the amount of hp they can take?

Thanks

Those are fine. I would say about 20psi and will be at hig 300s/low 400s

Damn. You really think its almost 400hp. I thought it would be around like 250. Which is why im  not answering anybody elses questions.

Ya easily..  I was running my 20g at 18 psi for a while, and I could spin the tires in the first 3 gears..  A buddy of mine was running a 20g at around 24-25 lbs, on his galant, and he said the turbo was really at its peak there..  

I would be carefull of that car..  He prolly rebuilt the motor because it got crankwalk..  Check to see if its a 7 bolt motor and check for crankwalk..

Its built i woulnt worry

I just asked him if he had a 6 or 7 bolt so ill wait for him to email me back. He also said it needed a tune to stop the backfire. Could i tune with an SAFC if i buy one or will i need a dyno tune?

quote:

ORIGINAL: Sebba

Its built i woulnt worry

Ya, but it also says its a stock crank in it..  If its a 7 bolt and rebuilt, I give it 70,000 miles and you will have a crankwalked motor again..  Maybe sooner depending on the boost that motor is run on.

No dont be retarded.

How many have you had crankwalk on you?

None : )