05-13-2010, 01:40 PM
|
 |
CC Member
|
|
|
Join Date: Sep 2002
Location: Hickory,
NC
Cobra Make, Engine: ERA 427SC w/427so, ERA GT #2002
Posts: 1,106
|
|
Not Ranked
The L/S ratio for 331s and 347s can be improved greatly my moving the pin up in the piston behind the oil ring, but we're talking custom pistons, aka, high price. You can get away with less than a 1.7 ratio, but I avoid anything under 1.7:1 for a racing engine. Not only is side loading greater, instaneous pistion velocity and forces on the pistons are greatly increased. Piston wear and failure are more of a threat that is cylinder-wall failure.
__________________
Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
|
Threaded Mode
