First Annular booster Holley carb?

[rgalajda]

In the 60s Ford had an annular booster carb, In the 80s Ford had Holley produce annular Annular booster carbs for them.
What was the first after market Annular booster carb Holley made and what year?

[Nick_nl]

My guess would be the Holley list 4010, i don't have a date to go with this.

[bigblockmark]

Early Pro Stock 4500 carbs on tunnel ram intakes.

[rgalajda]

[rgalajda]

I believe the 4010 came out in 1986. Kind of the forgotten holley. It was very similar to the ford 4100 carb of the 60s.

So other than the 4010, what was the first annular ( traditional) holley

[rgalajda]

Holley 4010 and Autolite 4100

[bigblockmark]

Annular appeared when they invented the intermediate circuit for tunnel ram dual 4500 carbs. Early 70's Pro Stock.

[rgalajda]

In 1977 David Vizard asked Mike Urich ( who was Holley's chief engineer ) what research Holley had done on fuel atomization . He said they had done no direct investigations into what made for good atomization and to what degree it affected part and full throttle performance.

[mike laws]

The Holley 4500 (not yet named 'Dominator') was built in 1968 for big-block Nascar engines. It had annular boosters and debuted in the 1969 Daytona 500.

Autolite invented the annular booster in the late 1950's.

[rgalajda]

Yes. And this was once again a Ford carburetor.

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