Most contemporary inlines have ports that are too small for performance applications.
If you use a shorter rod port velocity near TDC will increase more quickly and lead to meeting the ports limitations of flow sooner thereby making the engine even less efficient as speed increases. Its the wrong way to go.
As a correllary to that decades ago when drag racers built tiny displacement SBCs and other small V8 engines in the 220 to 265 cid range for the lower Gasser and Modified classes they(we) often used shorter rods and heads with ports sized for the larger 327- and 350-sized engines just to get the mixture moving more quickly down the oversized inlet tract. Just the opposite of our dilema with too-small ports.
Last edited by THE FRENCHTOWN FLYER; 05/24/13 11:33 PM.
