[TR] TR4A Piston Upgrade

[Randall]

> the closest I cam come is to inform the group that blood flow 
> to an organ (in most or our cases the coronary arteries 
> supplying the heart is the most
> relevant) is related to the radius of the artery to the 
> fourth power.

Wow, that's wild!  How does the flow get related to the square of the
cross-sectional area?

>  If the same holds true in the internal 
> combustion engine, that 3mm may translate into a lot of 
> additional horses.

Not so much.  Displacement follows the square of the bore, but 89^2 is less
than 5% more than 87^2; so we're only talking another 5hp or so (without
other changes).  At nearly $100/pony, not a lot of bang for the buck.

Randall