NOTES FROM A VERY SHARP MEMBER
http://victorylibrary.com/mopar/rod-tech-c.htm Quote:
Planning a 383 Motor
This engine is generally overlooked in selecting a high-performance project. The motor has an excellent bore to stroke ratio: 1.26-1 (similar to 327 SBC, better than 340). The short stroke allows high RPM without destructive piston speed (7100 RPM = 4000 ft./min., the accepted safe limit for piston stress). The large bore permits big valves (2.14 intake, 1.81 exhaust).
A potential method of increasing peak power is to substitute the longer 440 6.768 (LY) rods for the original B 6.358 rods on the original crank. This has the following effects:
» Increases the rod ratio (n) from 1.884-1 to 2.005-1
» Reduces the piston compression distance to about 1.525 for a useful weight savings
» Slightly reduces piston acceleration
This should allow an advantage in peak power. For a start in piston selection, take a look at the KB224 for BBC: flat top, CD = 1.52 (just below zero deck), and .990 pin for more weight savings and moderate cost. There may also be possibles for the 400 (4.34 bore), but not discovered yet. Ideas?