[Healeys] Girling brake boost ratio

[David Masucci]

Hi all,
Does anyone know the boost ratio of the stock Girling brake servo in a BJ8? Last night I replaced my original unit with the 8 inch Powertune unit (PN LE10117). The boost ratio is 3.00:1 which I thought was supposed to closely match the original. I am getting assist, just not quite as much as original, and I am curious as to why.
Thanks,
Dave
BJ8

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