Swapping carbs, maybe Holley Street Avenger?

Wish you were closer.
I love working on Holleys...

 

No, I probably DON'T know that!!! There appears to be only one nipple for the advance on this carb. It hangs out the bottom front, passenger side, sorta at an angle out and to the right, and down a little. I put it on there.

I have done no adjustments of any kind. Roland said it ran on his car as is, so I tried to drain as much gas out as possible and put it on and fired it up.

It does smell rich at idle, but I am not worried about that at this time, since the problems with BOTH carbs sounds and feels similar and I too am leaning toward a distributor/advance problem.

 

And Pensacola is not that far...I can put you in the spare room for the weekend...

 

You've got it hooked to manifold vacuum, not ported. Only ported nipple on a Holley is on the metering block. Before you said it popped even suddenly opening the throttle, I was going to suggest the fuel level is running low on the primary side, you might still check that. Is there a plug in the side of the main metering block where the ported nipple should be?

 

I have a 306 cu in. (302 bored .030) The cam has 512 lift & 230 duration. I have an Edelbrock RPM Performer intake. Holley Street Avenger carb (570 cfm). Stock heads. Holley Flowteck headers. Midas Ravin performance mufflers. Stock distributor with Pertronix electronic ignition (no more points). C-4 trans w/shift kit & 2500 rpm torque converter. 8" rearend with 3:55 gears. That's pretty much it....

 

baddad, I will have to download a diagram of the Holley. I have never used one and don't know "which way is up" on it. I agree that it is probably the wrong nipple. It is mounted way too low. On the Edelbrock, there was one mounted low and one a little higher that I used.

 

how do I identify what model this carb is so I can pull the data sheets off of Holley website?

On the top passenger side under the air cleaner, it has 6R5534B but I cannot find this on the Holley website.

 

Holley goes by the "list" number, that's stamped into the choke horn on the front side. List number for a 570 SA is 80570. The ported vacuum nipple is located on the right side of the carb, looking at it from the front. Front is the side facing you looking at it from the front of the car as it's bolted on the intake (single four bbl only, dual 4 bbl Fords had the carbs mounted backwards from this, ditto for the three 2 bbl sets as well) The fuel line on a Street Avenger is divided to flow fuel to two inlets, one forward, one on the rear. The ported nipple is immediately behind the forward fuel inlet (which screws into the front or primary bowl) immediately behind the front bowl is a 1/2" thick block, this is the primary metering block, there's another exactly like it in the rear on a SA carb, ditto for a double pumper too. Only the forward block will have a ported vac.1/8" nipple sticking out the right side.

 

baddad...seriously, and I am not joking, thanks for "talking down to me" here. I don't know the terminology on the Holleys. Your post was very informative.

Maybe some pics will help...The 6R5534B is at the top left side of the carb, just under the air cleaner, just inside the rim where the air cleaner gasket sets.

 

It sounds like I need to move that advance nipple up to the hole with the allen head plug?

 

:HandshakeYea, that's where it needs to go. You'll need a 1/8"NPT theaded nipple to screw in there. If you cannot locate one, I have a couple of spares. I can mail you one. :16suspectIf I wasn't so retarded on computers, I'd have posted pics to guide you.

 

I also see you've got a double pumper there, I got mixed up on that count thinking you had a street avanger. The list number is on the choke tower someone removed from that carb. Only way to ID it is by measuring the throttle blades and the throttle bore size now (unless some one else knows another way)

 

Don't mention it, it's the least I can do for a fellow "Texican" I was born just down the road from you in Texas City. Moved to Louisiana in 1977, but I spend half my time in Texas still, hauling freight back and forth. Going to my 30 year High School Reunion in Silsbee this weekend.:16suspect

 

WOW...right around my old stomping grounds. I was raised in Dayton, just west of Liberty. My wife's grandmother was from Silsbee. I was in Dickinson today picking up this carb (2 towns over from Texas City, for those non-Texans).

Thanks for all your help, I will try to find that nipple and see what happens. I will also, probably first, bypass the vacuum advance and see if the hesitation goes away. Might be a mix of the two problems.

 

the vac advance is definitly on the wrong port but its not your problem. the difference betweent the ported and manifold vac signals is only at idle. once your off idle they get the same signal. At this point your problem most likely is not in the carb. I would be looking at your distrubtor closely. check the rotor to cap post phazeing, the advance weights and springs, the gear on the botom of the shaft for wear, and carbon tracks on the distrubtor cap. What distrubtor are you using?