The base PFC maps are set up for stock turbos, your best bet is to get a PFC and find a good t04e or t04s map to go off of until you get it tuned but I'd be real careful.

GNX/GN Buicks- turbo V6 powered bricks that go 12s(or faster) with few mods

I noticed that it is a little small compared to some of hte pics of TO4s that I have been seeing.





It should be fine for now and I'll get the PFC....







Thanks gentleman!

I think a GN stock turbo is a straight T3.

Tyson, the 84 and 85 is smaller (looks like a t3)than 86-87.



I have the 86-87 style. The compressor side is bigger.

that is also very similar to the turbo on a turbo trans am, from the mid 80's.....they are small, and, IMO, worthless on a fd. i am thinking that it is similar in size to a tII turbo, but somewhere slightly larger than ONE of the twins off of an FD....