I tried searching and I apologize if this is a duplicate post.
I take no credit for this, but I thought I'd spread the word. I built the circuit from the link below and it works great. I'm running 20 PSI on the GTE ECU and the AFR's are great and driveability is awesome. If you want to build and sell them, it only costs an additional $10 for each one because you have to buy a minimum of 10 quantity for some parts. No, I won't build you one.
Build your own FCD
To hook it up TAP into 12v and 5v cut the map signal wire.
Here's the list of parts I bought from jameco.com to do it:
Here's the guts of the project:
Naturally aspirated cars suck...
95 SC300 5 spd EMUSA T-61 turbo, GTE ECU, Innovate SCG-1 WBo2/EBC, TT HG, ARP Head studs, Dual HKS SSQV BOV's, DIY boost cut eliminator.