I have 1985 vette with the 6870 ECM. I am going to convert this ECM in the winter. For the summer I would like to drive the car that just took me 9 months to build the motor. Its a 400 bored to 415 with a TPIS miniram and the ZZ-409 cam. 6" rods and AFR heads ported. It has 11:1 compression and 3" full exhaust and 1.75 headers. I need help with the prom. It appears there is no injector constant. I need to play with the pulse width. Is this correct? I ran the ALDS scanner and it tells me the car is now too rich. The BLMs are in the 108 range. With this what should I be touching. Is the pulse width the correct adjustment or am I missing the boat. It went rich because the chip was custom for a wild 350 with #24 injectors. I bumped the injectors to #30 for this new motor. The fuel pressure is 49lbs. Also does anyone have anything I can baseline my definition file with? Finally I have not played with WOT. I am told that WOT is open loop and I see two tables for that. Any comments

Thanks

Frank

 

I was in the same boat as you with my 85 camaro TPI 415 and I just took the 30#'s out, put the 24#'s in and called her good until winter and had alot of fun whoopin A$$ and the BLM came into reasonable and the A/F gauge said she was good to go