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Author Topic:   2 barrel carb question
posted September 30, 2003 09:14 AM
can anyone tell me right off what the length of the throttle lever swing is on a rochester 2 barrel?
From idle<------to------>full throttle.
(and what kind of carb. to look for too, I'll search the forums for that answer too though)?

posted September 30, 2003 12:05 PM
Since there are many different styles of Rochester 2G throttle linkages as well as at least 3 places that are commonly used to connect throttle linkage to on the lever itself, that's a difficult one to answer accurately.
The first thing I've gotta ask is WHY do you need that measurement? If you're trying to mathematically determine throttle pedal travel measurements, that's also something that can vary greatly due to the geometric pedal ratio (lever vs. fulcrum length) at the pedal itself.
Off the top of my head, however, if pressed to give ya a measurement, I'd have to say it's on the order of 2.5-3" or so, if the connection is made at the furthest point away from the pivot point (shaft).
As for what 2G carb to look for, the biggest Rochester ever made had 1 3/8" venturi and 1.687" throttle bores. As for what carb numbers had that, well, there were many, and many applications that used them.
The most common one to find is one that ends with "118" from the early to mid 60's, although there are many with those measurements that had different #'s for the last 3 digits.

Hope that helps, and if you need more info, feel free to ask or contact us.


[This message has been edited by KPLugnut (edited September 30, 2003).]

posted September 30, 2003 02:32 PM
here is some carb # to try-
7026113-66-67 366 truck or bus
7029118-69-396 car
7040114-70-400 car

posted September 30, 2003 10:04 PM
Thanks guys....long story...
Thanks for the #'s.

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