Is there a flat spot on the CARB?
There doesn’t seem to be any slack in it, though when looking down the carb and pushing the throttle it seems as though maybe there ought to be a little more fuel coming out than there is, or it ought to come out quicker at less throttle opening or something. Basically I seem to recall it getting a bigger shot sooner at some point in the past.
What does Holley carb, flat spot off-idle mean?
Holley carb, flat spot off-idle… I have a 600 CFM Holley vac secondary sitting on a mild 306. My original problem was that at 70+ MPH or lightly accelerating on the highway it would surge.
What causes a flat spot when accelerating from a stop?
The problem I did notice now is that I have a little bit of a flat spot off-idle when accelerating from a stop. Give it a little more gas and it doesn’t go any faster, give it some more and it’ll pick up. Or it you let it sit at the flat spot for a second or two it’ll pick up and take off like normal.
What to do about flat spot on idle?
Had to go to 69’s in my 65 Comet to eliminate the same problem. You may need a numerically higher power valve. Either that, or your vac advance is running off of manifold vacuum. Click to expand…
There doesn’t seem to be any slack in it, though when looking down the carb and pushing the throttle it seems as though maybe there ought to be a little more fuel coming out than there is, or it ought to come out quicker at less throttle opening or something. Basically I seem to recall it getting a bigger shot sooner at some point in the past.
The problem I did notice now is that I have a little bit of a flat spot off-idle when accelerating from a stop. Give it a little more gas and it doesn’t go any faster, give it some more and it’ll pick up. Or it you let it sit at the flat spot for a second or two it’ll pick up and take off like normal.
Holley carb, flat spot off-idle… I have a 600 CFM Holley vac secondary sitting on a mild 306. My original problem was that at 70+ MPH or lightly accelerating on the highway it would surge.
How is the throttle connected to the accelerator?
In the old days, there used to be a cable that was connected from the throttle to the accelerator. But now in the technological age, the car’s computer controls when the throttle opens and closes by the feedback it gets about the acceleration of the vehicle.