Quote:
Originally Posted by Dimis
Great to know! Its always perplexed me how 8 trumpets theoretically can't supply enough air for each cylinder when compared to a single carb  |
Anthony,
That's because a single 4 barrel carb supplying 8 cylinders via a single plane intake, has only 3 inlet valves open at any time supplied by a carb of example 750 cfm.
The constant flow of air, and the manifold plenum volume allows the cylinders in turn to draw from.
In an IR carb application (48 IDA), each cylinder can only draw from the volume within it's own runner, through the carb to the trumpet.
An IDA flows about 330 cfm per barrel at best.
Gary
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