Ditto, he's got too much clearance in the pump arm to start with. And with the Torker intake on it, he may well need a 50 cc accellerator pump to get enough fuel thru the squirters to satisfy the bigger plenum volume of the Torker to eliminate the off idle hesitation. He also needs to check the ignition timing to make sure it's not set at the factory setting, but advanced to around 12-16* BTDC. If the timing's off like this, then he'll also need to set the timing, then start over with the carb adjustments.
Have you checked the power valve if it has back fired in the carb you might have blowen the power valve if you have the wrong size powervalve it could be making it act this way. when you use different types of manifolds single plane dual plane power valves will react differently just remember that carbs have three different circuts idle, accelerate, and cruse most some people do not understand that these are very different circuts and need to beaddressed seperatly.
Did you check the metering blocks/plate for warpage during the rebuild?? Pretty important step with Holleys. Did you use a Holley kit for the rebuild?? Matching the gaskets for the metering block/plate is a biggie as well. You need to verify the fuel supply is OK. Pressure nice and steady? PSI?
Me too. I just went thru a 500 2 bbl last night I'd bought off of someone (internet buy) who decided it was too "complicated" Pretty clean inside, changed the powervalve, accellerator pump diaphram, needle/seat and gaskets. It's been god knows how long since it was last used, but after bolting it on, it fired right up and idled with no adjustments, once the bowl filled. One thing I did notice when putting it back together was the 1/4" of slack in the accellerator pump arm to pump lever clearance. Good bet that's why the previous owner ditched it.
Sounds like a few carbs I ended up with. The last one was one that always bogged and hesitated. His buddy had rebuilt it and set it up. 600 Holley. Had the secondaries jammed with a small nut and bolt to make them open mechanically. Gees I wonder why it didnt accelerate right?? Got that one for free. He replaced it with an new Edelbrock.
A great carb for a street car that'll be dead reliable. The only road to your engines true power potential! Double pumpers are my best friend. Dropped 1/2 a second off my ET swapping out a 750 vac secondary for an out of the box un-touched 750 double pumper.
Of course it ran better it was a factory piece and most of all it wasnt subject to this yo-yo that did the Holley and didnt serve any purpose except supply me with a perfectly good carb for free. I have to admit I'm a Holley guy but only cause I've been messing with them since I was a teenager. I've got a pretty good grasp of them and yes they are a bit fussy for such a simple design. Gravy to rebuild though. I've heard nothing but good things about Edelbrock for street use.
That's what I was gettin at. I'm sure they thought the Holley was a piece once they put an unmollested carb on it. I agree with you on your whole post also.. The Holley also looks better IMO. I traded a running 77 Impala (4 door) Tank with ice cold AC for my DP new in a box, no regrets.
I've done the nut and bolt in the secondary return linkage, way back before I knew they made lighter sec springs. Never had a problem with it that I could recall.
A friend of mine did the bolt in the secondary linkage and constantly fought the wide open secondary when he returned to idle... the ignition key got a real workout before I fixed it for him.
