[blykins]

The skater was an example of rotational momentum. It's still applicable for a "free revving" situation.

The formula given was for rotational velocity. Again, a component of that equation is radius.

The pro racing engines that you were referring to (mountain motors) also have larger than 4.310" bores also. Their bores are 4.5" and larger....which would put the combo at a square combination at least.

However, to me, any NHRA or Pro-Stock engine has no bearing in this argument anyway. They run those engines for 1/4 mile at a time and tear them down.

The same goes with any Engine Masters engine. I understand that several of the engines that were in the top 10 were running undersquare engines. However, those were not street engines. Shoot, they weren't even race engines. They are made to run one time on a dyno and make the most area under a curve. They also run 12.5:1 compression on pump gas....and some even use Honda rods.

However, I will say that some of the bores that are used in these mountain motors (700-800ci) vary from 4.500" to 4.700". To go along with this monster bore, the blocks are extremely large and this puts everything back into scale. A 6.700" rod in a BBF may be extremely long....but a 6.700" rod in one of these blocks puts the rod length/stroke ratio back correctly.....and corrects some of the cons that we listed to be associated with such a large crank in a Shelby block....extremely short piston compression heights, rod angles, piston speeds, etc.

If a largely undersquare engine is where it's at, then I'm gonna hop off and write a couple letters to some of the NASCAR and Indy car engine builders and let them know that they have their eggs in the wrong basket.