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Old 03-03-2021, 01:12 AM
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peterpjb peterpjb is offline
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perfect summary by Jim according to the IDA48,

90% of the Weber carburated small block Cobras are running 48IDA Webers.
That is because the owners want to replicate the glory age of Cobra racing, or because they should because of actually homologating these cars.

48 IDA is a binary race tool which works best with ON or OFF
tuning them for the street is quite a challenge, you have to add a third or fourth idle drill hole and tune it very carefully to a milder race cam, which means about 10%-15% less hp

44 IDF is not a challenge like that, I know some guys riding them on the street with double mpg that I have with my 48 IDA
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