i have a d15b2 nothing special really gay just looking to boost it on 7 psi and im new with the turbo stuff so i need to know what kind of turbo i should get and how would i go about setting the fuel management up..ive read alot of stuff on homade turbo.com,,and other websites im really just need advice from people that know what they are doing?and should i get a new or used turbo?and what about the rust??