I have an all stock 77'. The rig is in great shape but acceleration is lacking (feels like its dragging until you punch it then you get what you expect). As part of the trouble shooting, I've replaced all vacuum lines (and rerouted ones that were incorrect), rebuilt the carb (thanks Pinhead for the youtube video), and put all new parts on the distributor (cap/rotor/points/wires/advance, etc...). It's still not performing and I'd appreciate any insight. My goal is to keep it stock however soon I may add a bullet.
Ignition - I've attempted to set the timing at 7* past TDC (timing light set to zero when shot using #1 plug wire bb lines up with timing mark) at what "feels" like a reasonable RPM. I really don't know the exact RPM's as my inductance gauge on my multimeter won't hold a constant value. Also tried using a multimeter on the negative side of the coil also and once again no joy! Any suggestions on getting a good RPM reading?
Carb - It's a 77 federal carb. As in the photo below, inboard side has the idle mixture, rear has the idle adjust, fast idle, and choke adjust. Further to previous threads, I've backed off the idle mix screw 3 turns from full in and adjusted the idle set screw to what "feels" like the correct idle RPM. I screwed in idle mix until slight change and then came back out 1/4. Not sure idle mix is having much of an impact. Put the cover back on and took for a spin.
Still runs like dookie! Underpowered (but not running rough) unless you stomp on it. Also, idle was fluctuating when I came back in.
Thoughts/suggestions?
Ignition - I've attempted to set the timing at 7* past TDC (timing light set to zero when shot using #1 plug wire bb lines up with timing mark) at what "feels" like a reasonable RPM. I really don't know the exact RPM's as my inductance gauge on my multimeter won't hold a constant value. Also tried using a multimeter on the negative side of the coil also and once again no joy! Any suggestions on getting a good RPM reading?
Carb - It's a 77 federal carb. As in the photo below, inboard side has the idle mixture, rear has the idle adjust, fast idle, and choke adjust. Further to previous threads, I've backed off the idle mix screw 3 turns from full in and adjusted the idle set screw to what "feels" like the correct idle RPM. I screwed in idle mix until slight change and then came back out 1/4. Not sure idle mix is having much of an impact. Put the cover back on and took for a spin.
Still runs like dookie! Underpowered (but not running rough) unless you stomp on it. Also, idle was fluctuating when I came back in.
Thoughts/suggestions?