RE: Theoretical HP

["John Katos" <john_katos@xxxxxxxxxxxxx>]

After a quick search I fouind the taxable hp calculation:
Cylinder bore x cylinder bore x number of cylinders x 0.4
Using this formula on two old AMC 6s both with a 3.75" bore,
one with a 3" stroke giving a 199 cid and the other with a 
3 1/2" stroke giving 232 cid, both would have a 33.75 taxable hp.
Here is a link to a calculator.
http://www.vccansw.org/articles/vcca_article02.htm

John Katos


-----Original Message-----
I remember that the break point was somewhere in the 300 cu. in. area.
If memeory serves me correctly there was a case where two 3XX cu. in. were
on either side of the 58 hp mark, being that the bore was used it happened
that the larger bore engine had a slightly higher taxable hp than the
stroker.

-----Original Message-----
>>60-70 horsepower (in the modern sense. England used funny HP ratings in
those days (most likely for tax purposes) and I never have seen any
real correlation between modern HP figures and the old English ones.). <<

If was some theoretical hp figure based on the bore and stroke. Many
countries used similar schemes I think, but with different ways of
calculating it. You are correct that it was used for tax purposes.

All the best

Keith
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