Since SU and Stromberg carbs have pistons, if the flow gets
high enough, the pistons will reach their upper limit of travel.
After that point, I'm sure they will work poorly.
But I have no idea how high the pistons get in actual operation.
You would have to either run the car on a dyno and look, or
fit a little video camera in front of the carbs and drive around...
Doug Braun
'72 Spit
At 12:59 PM 8/3/00 -0400, Terry L. Thompson wrote:
>I would assume that since there is a difference of about 21 cubic inches
>between a 1142cc and a 1493cc engine blocks, that the CFM requirements are a
>pretty minimal change between the two engines.
>
>HS2's and HS4's both have external float bowls and similar operating
>characteristics, but a differing CFM at Wide Open Throttle.
>
>At 1.5 HG (inches of mercury), a single HS4 (1.5 inch throttle bore)
>carburetor has a value of 142 cubic feet per minute at WOT.
>
>At 1.5 HG an HS2 (1.25 inch throttle bore) carburetor has a value of around
>98 cubic feet per minute at WOT.
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