therob.com AKA Rob, claims to have 2 set-ups running on low boost and afrs with big injectors. I ran a HKS SAFR and 33lb injectors at -30 across the rpm range. blew the engine before I got the trubo on the car.
I ended up going with a AFR, FMU, 33lb injectors, and the hks safr to fine tune it. And still ran soo rich, I was prolly washing the oil off the crank bearings, with unburnt gas.
If you wann go cheap..then learn to weld, fabrecate , research and spend most of your time hunting for good deals. It took me 5 years to finaly get boosted and I blew it up 3 times in the first month.
If your willing to spend money..by high quality Kit, or buy a stock boosted car!