the edelbrock 750 will be very close to a stock 440 carb. as they come out of the box they are too rich for a stock application but are fairly easy to recalibrate. there are factory jetting tips in some of the old service manuals that would be a big help. the 750 edelbrock is identical in throttle bore and venturii size as a '67 440/375hp. the '68 and up 440/375hp had slightly larger secondary venturii. in my opinion the '69 avs are the best carbs, but will need more recalibration than the edelbrock 750.
Novice at the Edelbrocks here. Which model 750 is the one you're speaking of, the "standard" Performer or...?
I've spent enough time on that website to figure out only a couple things, like the Thunder ones are true AVS carbs but are like 800cfm, for example - sounds like a big ol' carb for a stock 440 to me.
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Relax, I didn't mean to offend you, if I did I apologize, don't take my advice, **** do I care, I was just trying to offer some help... good luck.. now I see how much patience you have, it must be the carb's fault, (now theres a cheap shot for you ;) )
Aye, and a better quality one at that.
"Don't half-*** it, son..."
Lookit, I coulda sworn you were one that replied to some of my other posts in regard to tuning the 3310, but I could be mistaken. If not, suffice to say there's been a LOT of tuning going on with the dang thing, based on straight up advice received here at FBBO as well as extensive time spent with the Holley tech support people.
I've got quite a collection of jets, power valves and what not as a result and to be honest, the car is fine between 1100 and 4000 RPM.
It could just be I got a lemon for all I know.
It could just be the gas we have around here is crap, regardless of the multiple brands (including "100% pure" stuff).
I have had to replace one flex line between the metal line from the tank and the pump, for example, even though it was new just a couple years ago - gas ate it up and separated inner from outer, no shiyat.
I just want to see if another carb makes things better - and after all, the eternal search for making our stuff better is a major part of the hobby, is it not?
I'm going to find out, but in typical Ed manner, I'm gonna research hell out of it and ask for anyones' opinion who has travelled in these same footsteps before me.
Just makes sense.
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I can't seem to find any of your previous threads about the Holley.
Tons of 'em, spanning all the way back to 2011. Most actually have "Holley" and some have "Holley 3310" specifically.
Still other threads that started out talking about ignition or whatever steered back to the Holley with time.
Can you tell I'm sick to death of fooling with this carb?
Damn thing is still spotless and like new. I'm gonna sell it to Seventy.
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Now that you mention it....
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I've ran Demons, Holleys, Quadrajets, Mortorcrafts and Carters and Carters are right there at the end for me. I ran an 870 Avenger last summer and it was a turd right out of the box but bumping from a 4.5 to 6.5 power valve and jumping up about 10 jet sizes had it running like a top. Gotta put the work in is all there is to it and take time to figure it all out...... frustrating!
Does "right there at the end" mean last choice, I presume?
Yep, current PV in the 3310 is the 65 (half the vacuum @ idle roughly, as Holley tech said) after trying lower ones.
Winds up, that's the one that comes in a 3310 to begin with.
Carb came with 70 (!) primary jets when it was supposed to have 72's stock - I have 75's in it now.
Accelerator is snug without actuating @ idle. Mixture screws set for best idle RPM AND best vacuum.
Carb is absolutely spotless inside and out, has the purty "pewter" shiny finish. All ports are clear, gaskets perfect.
Makes a darn good looking devil sitting on the stock intake.
Further, let me state for the record all you holley fans, that I have been a huge FAN of the 3310 for several decades now. I've never had issues at all, heck most of the time I've never even had to change any internals, when using them on stock 440's - every one of the half-dozen or so 440 cars I've owned over the years (and even a couple 383 'Bees) LOVED this carb!
This one is a first. Hate giving up on it, but you can only fool with something for so long until it's time to move on, lest you lose motivation - and I don't have the time left on this planet for that.
So....Holley goes away, to be replaced by ????
