Qft carburetor help
And if its at the drag strip, give us the best description you can of the conditions.
For example, Foot braking and bringing it up to 2500 rpm and then going full throttle at the light.
First try to get the gentle acceleration as good as you can.
Then experiment, possibly with secondaries disconnected if that helps reduce variables.
There's a few graphs floating around on the internet illustrating pump cam lift vs. throttle angles.
Take all, including Holley's, as useful but not always what you may find on a specific carburetor. One reason is the pump lever contact on the cam can be alterered. There's probably other reasons too.
Here's the one from Holley catalog. I've got a couple more if anyone wants. But this shows why mderoy340 made the suggestion he did.
Is this 'off the line' street driving or at the drag strip?
And if its at the drag strip, give us the best description you can of the conditions.
For example, Foot braking and bringing it up to 2500 rpm and then going full throttle at the light.
Does it goes then falls a bit flat (probably used up to early)? or does it hesitate then go (too late)?
First try to get the gentle acceleration as good as you can.
Then experiment, possibly with secondaries disconnected if that helps reduce variables.
There's a few graphs floating around on the internet illustrating pump cam lift vs. throttle angles.
Take all, including Holley's, as useful but not always what you may find on a specific carburetor. One reason is the pump lever contact on the cam can be alterered. There's probably other reasons too.
Here's the one from Holley catalog. I've got a couple more if anyone wants. But this shows why mderoy340 made the suggestion he did.