Odd Holley Nozzle

[Machspeed]

Has anyone seen a discharge nozzle like this before? It's on a 6299-1(390 cfm) Holley main body. I got this at an estate sale a few years back with several other carburetors/parts.There's a base that I think goes with it and the primary and secondary shafts are connected so they open together with a 1:1 ratio. I'll probably never have a use for this but I thought it was interesting.     

[machoneman]

Rare but....I do remember seeing one long ago for a tunnel ram, dual carb'ed engine. The 1:1 ratio is also a tip-off it was used on a t-ram intake.

I guess that the carbs were back to front, meaning the shooter on the front carb was normal while the rear carb faced backwards....meaning the actual pump shot was on the 'primary' or front side of each carb.

[e philpott]

That looks like a single pump that squirts all 4 barrels , probably a 1 to 1 base plate

[gt350hr]

    That is an aftermarket nozzle sold by EELCO  in the late '60s. A kit was made to eliminate the vacuum secondary and the nozzle was used to eliminate the "bog"  when the carb was modified.  They were common back then and the whole kit sold for 14.95 at the speed shop I worked at here in So Cal. Segal, Mr Gasket, and other companies also sold their versions . NOT a genuine Holley part.

[wowens]

Seen a lot of carbs in my time, that's a new one on me.
60's ingenuity at its best.

[jayb]

I've never seen one of those either, thanks gt350hr for the history lesson!

[Machspeed]

Thanks guys. I knew someone here would know something about this.

[BattlestarGalactic]

Friend Brian Merrick ran one on his '64 Galaxie back in the 90's when I first met him.   You got a pair of 1/2 gears that mounted to the throttle shafts on the choke side that locked them together.  That squirter was added to remove the bog, like mentioned.  It was a cheap changeover from having to buy a real double pumper.

[thatdarncat]

Over the years I’ve picked up a few Holley cores that have these kits. I just want to add a word of warning: the gear set-up these use are usually a hard plastic and the design makes it very easy for them to lock up in an open throttle condition with a little bit of dirt, or wear, etc. They also put pressure on the throttle shafts resulting in extra wear. It is a very poor design. If you look carefully at the secondary linkage on a factory Holley with mechanical secondaries like a double pumper or center squirter you will see it was carefully designed to not bind the linkage and also provides a method to close the secondaries as the primaries close. I add that because I have also seen people modify the throttle arm on the roller linkage like a center squirter carb uses and remove that provision that positively closes the secondaries, which is very dangerous. These kits were designed back in the day before mechanical secondary double pumper & center squirter carbs existed or were as common, there’s no good reason to run them now in my opinion. Here’s a picture of the gear linkage just so everyone knows what we’re talking about, and the extended squirters.

[gt350hr]

  I agree with Kevin , the "gear drive " ( plastic or aluminum ) is potentially dangerous for binding.  The Segal  kit had a bolt on "cam" plate (copied off of a 660 center squirter) that was very safe.
     Randy

[mike7570]

One more,
this is how I got my 850 with the holes in it. I was worried NHRA might not allow me to use it. I had a real good carb builder set it up for my stock eliminator build and he was able to fill the holes and make it look like they were never there.

[Drew Pojedinec]

I spend way too much time plugging those holes while restoring carburetors.

If you want a double pumper.... buy a double pumper.

[gt350hr]

  Drew ,
     That is easy to say now but those were created before the double pumper was invented.  It was about the same time Ford paid Holley to create the "center squirter". The double pumper came out and  the sale of these squirters fell off dramatically. The double pumper is the logical choice now no argument.

[Drew Pojedinec]

Certainly.... I meant from the 2018 perspective.

[Falcon67]

In all my years fiddling with carbs and walking through swap meets, I think I've seen 1 (one) total.  Fun stuff.