I have 350, not sure of the cam size, just installed a Edelbrock AVS2, she runs great, clean, but I have cam surge now. I did not have this before when I had old carb that was running super rich.
Any ideas on what to do to reduce the cam surge? I checked timing and vacuum all good. Could it be torque converter issue? I do not know a ton, newbie trying to learn. thanks
Have you already adjusted the idle mixture? You should get a tach and adjust using the idle drop method.
Set the idle mixture screws lightly bottomed out(all the way in clockwise) then back them each out 1 turn.
Start the truck and let it fully warm up.
Make sure the choke is off.
Set idle to ~750RPM.
Adjust the idle mixture screws out(counter-clockwise) 1/4 turn at a time until the idle tops out and starts dropping again.
Adjust the idle set screw as you go to make sure that it stays within ~100rpm of the 750rpm you are looking for.
Once you have found the amount of idle mixture adjustment that yields maximum RPM, set the idle RPM to exactly 750RPM, then you want to screw the idle mixture screws in(clockwise) until the idle RPM drops to 650-700RPM.
I actually do this final adjustment with it in gear, parking brake set, wheels chocked with BIG blocks. Make all adjustments small and carefully.
Once the final idle drop is set to 650-700RPM in-gear, I put it back in park and adjust the out of gear idle back to around 750RPM, then make sure everything feels right when driving it around. Once that is done, you can set the high idle and choke setting the next morning after it has fully cooled down.
