Messages

1

Originality / Re: Survey - DZ4053 Holley Carb (vented?)

« on: March 22, 2009, 02:37:47 AM »

The only rub with that scenario is the fact that the aux. ("secondary") bowl vent on the primary float bowl closes when the throttle is opened.

2

Originality / Re: Survey - DZ4053 Holley Carb (vented?)

« on: March 21, 2009, 08:40:54 PM »

Gary;

Honestly, that's still one of life's little mysteries.   

I never have figured out what benefit it really offers over the main vent in the choke tower. The most plausible explanation I've heard yet is that it offers additional ventilation to help alleviate fuel percolation during extended hot-soak conditions.

For now, that's as good an explanation as any to me. 

Eric

3

Originality / Re: Survey - DZ4053 Holley Carb (vented?)

« on: March 21, 2009, 01:52:13 PM »

As Ed stated, the 4053 carbs did not originally come with the vented primary float bowls, where the 4346 carbs did.

There are only two significant differences between a 4053 and a 4346; the vented primary bowl is one of them, the primary power valve is the other. Otherwise the carbs are essentially identical.

Eric

4

General Discussion / Re: 4053 DZ SPECS

« on: October 01, 2007, 04:30:33 PM »

Dave;

The primary idle air restrictors on the 4053 DZ carbs are actually left open from the factory. There are two small adjustable air bleed screws located in front of the choke tower which intersect the idle air bleed bosses that you use to adjust the idle air supply. They are normally hidden under a blob of white epoxy on either side of the choke tower, but often the epoxy has deteriorated and the slotted heads of the screws may be visible.

The idle fuel restrictors on the primary side 5583 metering block should be .036"

Hope that helps.
Eric