Buying a used 16g

[CyberDSM]

Hey guys, I'm thinking about buying a used ported 16g. The thing is I don't have any fuel support at the moment, only basic bolt ons. Would I hurt anything by running it at 15psi on 91 oct (CA gas sucks). And if the answer to that is yes, would it be faster than my t too small at 15psi? Also I thought I remember seeing a thread debating 14b vs 16g, I tried searching but couldn't find it. I can get a ported 16g for 400 or a ported 14b for 200. Are the gains from 14b to 16g worth an extra 200?

 

[GRNDSM]

The choice of the turbo will also depend on its conditions. The last production 14b was sold in '94 and most people who needed to buy a new turbo since then went with the 16G (or larger). So 16G's are usually much newer. Hoever, they are usually used with higher boost, wears them out more...

I would aslo consider condition of the exaust housing.

And lastly, I have been using this rule of thumb when buying any used turbo: if you add $300 (typical turbo rebuild price) is it still cheaper than a new turbo? If it is, I would go with it, if it is not I would pass unless I knew for a fact that this was a low mileage, well taken care of turbo.