Quote Originally Posted by backebo View Post
Hi there

New here and Think itīs awsome with the knowledge you have here.

Looking for a good bin file to start with, hopefully just fine tune for me

The Engine is Vortec block with lt-1 pistons and cam (205/207, 117 cl ) and ported 193 heads. So the Engine have a lite more CR and litle more cam, and breath better ( ultimate tbi mods also)

The car is a G20 van with th700 , it idle ok butt litle rich i think and i belive it realy need a good chip work to wake up.

Live in sweden and the octane here is 95, and "trucks" pre 91 have no emission regulations so no cat or EGR on the car.


Thanks and sorry if my English is not that good in Writing // Mats
Actually you are probably a little lean. I had that same setup about 10 years ago. 1983 G20 van, 355 with flat tops, ported 193s and and a 201/208 LT1 cam with a 116° LSA. I had doug thorley tri-ys and dual 2.5" to single 3.5" Y-pipe. I had to run 454 80# injectors at 15 psi to get it enough fuel for WOT. I ran a 454 TBI unit on an GM van manifold that had been bored to 2". Before I started burning chips, I was running an external regulator with vacuum reference that pulled the fuel pressure back to 8 psi at idle. I ran it with 8° initial timing advance as well.