Anyone ever see/have a Holley 3 barrel carb?

Reverse in the wrong place and look at he HP!

 

Sorry for the shifter ball.... My bad.. Been ages since I stired gears on a Muncie... The decal is correct for an SCCA Traco (sp) prepped 302....

 

I got a set of 421 badges somewhere around the shop.

 

BiG bump!....

 

WOW! Talk about an OLD thread!

Stromberg, Carter, and Holley all made at least one 3-barrel.

Stromberg was first (in the 1930's). No flow rating was listed, and only the prototype was produced.

Carter was next (1963), and while no CFM was advertised, the actual flow test was 939 CFM at 1.5 inches, and 1128 at 3.0 inches. The CFM figures are interesting because the flow area is LARGER than the Holleys. I have a letter from Carter stating only 15~20 were produced. This is incorrect, as at one time I knew the location of 24. In any event, the Carter was very low production. Carter did not really try to sell these carbs, and there were only produced because of Carter's association with Pontiac. The only manifold using these was the Pontiac SD intake; which today is as rare as the carbs.

The Holley was the last, and advertised two models, a 950 and a 1050 (reiterating, the Carter was larger than the Holley 1050). Truth in advertising???

The Stromberg (pictured earlier in this thread) was similar in design to the so-called 97, with three individual barrels all the same size.

The Carter was a modified AFB, with all material in the secondary area removed. The Carter used secondary linkage such that the primary and secondary plates opened simultaneously. This linkage was unique to the Carter 3-barrel. For street use, this linkage could be replaced with the conventional linkage from a later Comp Series AFB (4700 series, not the fake 9000 series) to allow the secondary to open in what would be considered a normal manner. The original application of the Carter 3-barrel was NASCAR only, hence the 1 to 1 operation.

The Holleys used a secondary diaphragm to open the secondary; but an aftermarket linkage set was available to allow simultaneous operation. Holley sold their carbs as aftermarket, with the aid of Edelbrock, who offered both an intake manifold, and a intake/carburetor package.

Most of the above has already been posted in this thread. This entry simply summerizes for the first time reader.

Fun stuff.

Jon.

 

Eelco made a vac secondary to mechanical kit with the gears. Lippy

 

I think it was Segal, not EELCO but after all these years it makes no difference. You needed to use the 50cc Holley accelerator pump with that secondary nozzle but even then it didn’t work well. Maybe 5.38’s would have helped?

 

The Carter 3-bbl carb and matching Nascar Pontiac Super Duty intake manifold... Thanks Carbking!!!!!....

 

Demon has 625 cfm and 750 cfm 3-barrel carburetors. Demon was taken over by Holley.

 

Nope the kit we had was Eelco. Dad put it on our 58 edsel wagon. Ran good just no mileage. lol.

 

notice the cheater screw on to open the secondaries

 

i had one with the gear drive for a while they liked to bind and not return

 

Not my intake, I have wondered the same thing. I thought the intake was notched. Maybe a spacer was used. A spacer was used on the Pontiac SD dual quads.

Jon.

 

Looks like it was notched out by hand for a Q-Jet ?

 

They must have used a spacer...?????....

 

Sent an email to a friend who has one, and has run them.

He stated that the casting number is correct, but the divider SHOULD BE NOTCHED.

He guessed this was one obtained directly from the skunk works and the machining was never finished.

Jon.

 

OK, more proof.

My friend suggested that I look in Pete McCarthy's book "Pontiac Performance - 1955 to 1979" which I should have done without needing a reminder.

There is a picture of the slotted intake on page 159. The slot is much longer from front to back than the one on the C3B Chevrolet intake.

The book is copy-writed. As I have old-fashioned ideas about copying and posting copy-writed material, I will not post the picture; but if interested, the book is paperback, and is required reading for any Pontiac enthusiast.

Jon.

 

Anybody have any clue on this one? Secondary metering block, automatic choke, NO list number, no holes in the lower throttle body. Played with several of the 3 barrels and never saw this before. I was told it came with a group of carb's a guy got from a GM development dept.

 

Never saw it before either but I could imagine it being used in L-88 induction development but for some reason they settled on an 850 CFM four barrel.
But then again Pontiac Ram Air is a possibility too.

 

Aghhh! My eyes

 

830 cfm Holley for the L-88....

 

Yeah, I know..... Sorry!....

 

All of the big-3 were doing 'things' in the background that, like the carbs, then take 50 years to come to light, if ever.
The ball-stud Hemi also comes to mind.

 

Looks like a prototype that never got destroyed... Nice save!....
I have a list#-4223 850 center squirter that came with a secondary metering block and a power valve....
I'm surprised that 3-bbl only has a 30cc pump on it instead of the REO 50cc version.....

 

If I had one of those 3-bbl carbs, I'd probably take it in to work and modify it for a set of Barry Grant annular boosters....

 

Hmmm . . . Maybe mount the carb rotated 90 degrees ? ? ?

 

Earlier in this thread a couple of people mention modifying air cleaners or using a tapered air cleaner to make the 3 barrel work better. Does anyone have more details on this?

 

You do know you just caused a lot of guys to look like a "Bambi in the headlights"!