I think I am having timing issues on my motor. Ill give you the specs first:
355 SBC
10.3:1 compression
64cc heads
Lunati 550 lift 288 degree cam
Weiland 17530 manifold
Holley 750 CFM double pumper
456 gear
powerglide
Car weighs 2800lbs
28" tire
Ok, now this engine ran fine in my old camaro all I changed was the distributer to a stock type HEI with an MSD 6al2, and the carburator from a 850 dominator to a holly 750 street carb with choke.
Now the issue I am having is when Im crusing under 3500 rpms and stab the gas the car almost shuts off and falls on its face then takes off.Also does this from idle and in a neutral rev will occasionally backfire and stall, did that today actually..It also has a tendancy to break up until 400 rpms but I havent done a full WOT pull yet.
After a part throttle cruise When I pull the plugs the front 2 cylinders and rear 2 cylinders look very rich and all the middle cylinders look much leaner, they could be fouled cause I did have a stuck needle and float at first.
The carb is completely stock other than I went from 28 pump shot nozzles to 31 and it seemed to help a little bit.
The way I set the timing was #1 cylinder to about 10degrees BTDC and dropped the distibuter in, car started up fine, dialed in about 12 degrees timing at idle which is what I was running. I however have no clue what my curve would be or total timing.
Could someone explain the difference of initial timing, total timing and mechanical advance?? Im a bit of a novice at this...
355 SBC
10.3:1 compression
64cc heads
Lunati 550 lift 288 degree cam
Weiland 17530 manifold
Holley 750 CFM double pumper
456 gear
powerglide
Car weighs 2800lbs
28" tire
Ok, now this engine ran fine in my old camaro all I changed was the distributer to a stock type HEI with an MSD 6al2, and the carburator from a 850 dominator to a holly 750 street carb with choke.
Now the issue I am having is when Im crusing under 3500 rpms and stab the gas the car almost shuts off and falls on its face then takes off.Also does this from idle and in a neutral rev will occasionally backfire and stall, did that today actually..It also has a tendancy to break up until 400 rpms but I havent done a full WOT pull yet.
After a part throttle cruise When I pull the plugs the front 2 cylinders and rear 2 cylinders look very rich and all the middle cylinders look much leaner, they could be fouled cause I did have a stuck needle and float at first.
The carb is completely stock other than I went from 28 pump shot nozzles to 31 and it seemed to help a little bit.
The way I set the timing was #1 cylinder to about 10degrees BTDC and dropped the distibuter in, car started up fine, dialed in about 12 degrees timing at idle which is what I was running. I however have no clue what my curve would be or total timing.
Could someone explain the difference of initial timing, total timing and mechanical advance?? Im a bit of a novice at this...