I've got a '69 with a 350/TH400 peg-leg 10 bolt. I bought the car with the drive train in its current form. It's got an old Edelbrock C3B intake, a Holley 600 (type 4160, 1850-3), and an Accel Supercoil atop an Accel distributor. The engine starts making power around 3300 and pulls hard up to about 5800. The problem I am having is as follows: When I put the pedal all the way down, the engine feels like it is being choked. It will accelerate, but does not pull like it should. When I back off the throttle just a bit, it picks up hard, but finding just the right throttle position is a challenge, as wide open feels choked, and backing off too far makes makes it just a partial throttle acceleration. I'm not sure where the problem lies, but I feel like it must be in either the ignition or carb. Any ideas what's going on here?
Thanks.

 

may try cleaning the carb to start with, also what stall u have in it? May try doing a complete tune-up (plugs, wires, cap, rotor, fuel filter, peg leg Im sure its got a 3.08 or so gear, may need to put it at 3.73 atleast. seems maybe a 3-3500 stall needs to come your way, be sure to put a remote trans cooler on it as you go....

 

Thanks- I've done plugs, wires, cap, and rotor. Fuel filter is an easy go so I'll do that. Yeah, the rear gears are real long. I'll keep plugging away at it!

 

never ending, check to see where the timming is set at too...

 

Were you messing with the weights or springs on the distributor at all (or maybe you need to)? You could have springs that are too tight, or weights that are too light, limiting your total advance.

 

I have not messed with the springs or weights at all, but I'm not sure if the fella who owned it before me may have. I still feel like this is a little more fickle than something consistent like mismatched weights or springs. If it was springs or weights, wouldn't it be consistently off, and not remedied by just backing off the throttle a bit? I haven't messed around with too many distributors so I may be wrong.

 

So, I got out and messed around with the Camaro today. I replaced the in-line fuel filter before the pump and am going to install one more between the pump and the carb at a friend's suggestion. Still the same problem. I drove it around for a bit trying to pinpoint where the problem was. As a baseline: up to this point- new cap, rotor, air cleaner, and fuel filter. In first gear at 1500 rpm, when I put the pedal all the way down it will accelerate hard from 1500 to 3000 but when it reaches 3000 rpm it stumbles hard, almost a complete loss of power. This is brief, only from about 3000 to 3400. Then, at 3400 then engine begins to pull harder than at any other point in the curve, right up to about 6000. In this rpm range (3500-6000) although it pulls well, I can still feel it popping and missing a bit, but not even comparable to the problem from 3000-3400. Any ideas???

 

Since you don't know the history of the carb, rebuilding it may help more than it can hurt. Before that though, for fun you can check the float levels and make sure they aren't set too high (flooding out) or too low (starving the engine).

 

Another thing to check is your fuel line back to the tank. Replace the old rubber hose that will suck air with new hose. Also GM put in tank filters on the end of the suction tube. I pull the tank and get rid of that filter. It comes apart and ends up plugging your inline filters. Also check the size of your fuel line. Some of the older cars had 5/16" fuel line and 3/8" is better. My Corvette had a kink in the fule line where one of the factory bends went around the frame. Came that way from the factory. Didn't cause a problem until I put a 383 in it and it would run out of fuel at top rpm.

 

If you do that, be sure to have an in-line filter somewhere before the fuel pump, or you may eventually tear up the pump.