1966 Fury III - Unfinished Project

[Philip Andrews]

Let us know if you figure something out. I bought some from eBay for that reason.

Polished and clear-coated has so far independently been the answer.

 

[Philip Andrews]

This carburetor is irksome.

New floats, 5psi fuel pressure and it barfs out of both sides upon fuel delivery.

Gushes with each pump and doesn't hold pressure.

I can't see why, it's all put together correctly.

Phil

 

[Ross Wooldridge]

I hate to be a killjoy, but get an AFB.

They're pretty much bulletproof and simple. Get them setup initially and then forget it.

 

[Philip Andrews]

I hate to be a killjoy, but get an AFB.

They're pretty much bulletproof and simple. Get them setup initially and then forget it.

I've been looking at alternatives, believe me. I was just hoping to get this piece of junk to work right, being as I own it already.

 

[68PK21 440.6bbl]

Your terms are very vague and nothing like what I've heard in a mechanics world. (old)

"barfs out of both sides upon fuel delivery"
"Gushes with each pump and doesn't hold pressure".

From the looks of how dirty the throttle bores are in your pictures I'd hate to see the inside passages.
You need a good carburetor rebuild person IMHO.

Good luck...


.

 

[Philip Andrews]

It's being fed from the engine driven pump. That pump, when stalled by placing my finger over the end of the pipe, builds a static pressure of 6psi.
As it's driven by an eccentric, the delivery is uneven (as opposed to, say, a rotary vane pump driven by an electric motor).

Upon priming, the secondary idle air bleeds bubble and spit, before the bowls fill completely.
If I continue to crank the engine, the fuel pressure spikes 5-0-5-0 psi as the engine turns. With each rise in pressure, all four booster venturis pour gasoline because it would appear the float valves are not stopping the flow of fuel.

Internally it's as clean as I could make it, all the rubber and plastic parts are new. The throttle bores are sooty, yes. All the passages pass carb cleaner under pressure as you'd expect them to.


I didn't go much further because it floods so badly. I wanted to try determine cause and resolve that first.

Phil

 

[rkrochen]

This carburetor is irksome.

New floats, 5psi fuel pressure and it barfs out of both sides upon fuel delivery.
View attachment 616709
Gushes with each pump and doesn't hold pressure.
View attachment 616708
I can't see why, it's all put together correctly.
View attachment 616710
Phil

Hard to tell from the pics but something doesn’t look right with the spring. I wonder why it is at an angle. It’s been a lot of years since I had a look at the inside of one of these so I don’t remember it too well. Have you tried to lower the float levels at all.

 

[Philip Andrews]

Hard to tell from the pics but something doesn’t look right with the spring. I wonder why it is at an angle. It’s been a lot of years since I had a look at the inside of one of these so I don’t remember it too well. Have you tried to lower the float levels at all.

It's a funny little beehive shaped conical spring which makes it look like it's at an angle.
Yes, I tried setting the level, it's at the lowest.

I think the burst of fuel pressure is overwhelming the valve. If I clamp the pipe with grips it will start and run.

Phil

 

[Philip Andrews]

Yup, if I regulate the fuel supply to a trickle it will run. However, even at a trickle with no pressure registering on the gauge, the floats don't close the valves.

Next object to be launched into orbit: this carburetor

 

[Just Carbs]

I've used twin Holley 850s on big roots blower motors for boats, and for good reason.
And had a few smaller ones on cars that worked well. If a car had a good working one, I would run it. But I wouldn't buy a new one or repair one for a car.
Carter AVS is my favorite.
A simple Holley float valve shouldn't be too much of a challenge for you.

 

[Philip Andrews]

I've used twin Holley 850s on big roots blower motors for boats, and for good reason.
And had a few smaller ones on cars that worked well. If a car had a good working one, I would run it. But I wouldn't buy a new one or repair one for a car.
Carter AVS is my favorite.
A simple Holley float valve shouldn't be too much of a challenge for you.

You'd think, but so far it's proving elusive.

I've a couple ideas though. It can't be a large number of things. Trouble is, it gets locked inside a sealed metal box and that's difficult to see what's happening inside.

 

[live4theking]

 

[Philip Andrews]

Found the problem.

Car runs now

 

[rkrochen]

Found the problem.

Car runs now

Don’t leave us hanging what was the problem.

 

[Philip Andrews]

Vent tubes were clogged.

 

[Philip Andrews]

Mud daubers are:
a) sneaky
b) industrious

 

[Philip Andrews]

Got it cleaned out. Better than it was.

Reassembled, starting to get the float levels set up right and the idle mixture.

It's started to leak from the front, need to find out why. Doesn't like to idle much.

It got a bit warm. Left it to cool down and the battery to charge.

Phil

 

[Philip Andrews]

Had a moment between house work and cooking to cut a relief in the arch return, and with large lever and size 8 popped the front back into something much closer to the shape it should be.

Not perfect at all, but better for 5 minutes' work in the rain.

Phil

 

[MetalManiacAZ]

Are you gonna bring that sweet Pontiac to Cruisin the Coast next week, Phil?

 

[Philip Andrews]

Are you gonna bring that sweet Pontiac to Cruisin the Coast next week, Phil?

Right now I'm not sure.

I'm not going the Saturday, for sure. It coincides with Depeche Mode playing in New Orleans and my wife wouldn't pass that up...