383 tuning help

[Fast355]

Fast, Thanks for the above post. I have a new Delco EP376 pump Not sure what it is but I’ll look it up. I would think you want a AFR in the 13’s at wide open correct? I got a wide band hooked up and an LM1 on the seat next to me and went for a drive..Runs fairly well driving it normal but it has a lean heasation if you run at 25mph and lightly step on the throttle.. Also I went WO up a hill and in no time the AFR went into the 17’s. Not good
So I’m trying to tunerPro up and running as that’s another challenge with my limited skills with a laptop..

Delco EP 376 pump. Will this do?
http://www.gmtuners.com/tech/fuel_pumps.htm

You want a cast iron head small block around 12:1 under and near peak tq and about 12.6:1 at peak hp. Those heads usually like a pretty quick advance curve and about 30-34 total advance at WOT. Cruise timing can be upwards of 42 at 3,000 and no load. If you set the initial timing at the distributor to 10* and set the Initial timing in the .BIN to match you can experiment up to about 52* of timing to see what works best at cruising speeds without load. Generally to get the no load timing right, I will use my Autoprom, hold the engine at a steady 1,200 rpm. Look at the timing cell the engine is running in KPA wise, holding the throttle steady, I will then slowly advance the timing until the RPM stops rising. I will repeat this process at every RPM value of the timing table up to about 5,000 rpm. For a good starting point you can then interpolate the values down to your WOT timing. Works well as a starting point for me.