318 poly 'wideblock' cam specs


Melling SPD-13 (obsolete p/n)
Specs provided via phone by Melling Tech support 4/25/07

Intake Open: 8 BTDC
Intake close: 52 ABDC
Adv Duration: 240
Cam Lift: .269
Valve Lift: .404 Rocker Ratio: 1.50
Valve lash: .018

Exhaust Open: 49 BBDC
Exhaust Close: 16 ATDC
Adv duration: 245
Cam lift: .269
Valve lift: .404 Rocker ratio: 1.50
Valve lash: .021
overlap: 24


Factory 2bbl 318 Cam Specs (not truck and/or not accurate?)
from http://www.geocities.com/MotorCity/Track/4164/specs3.htm

Intake Open: 19 BTDC
Intake close: 45 ABDC
Adv Duration: 244
Valve Lift: .403
Rocker Ratio: 1.50
Valve lash: ???

Exhaust Open: 59 BBDC
Exhaust Close: 1 ATDC
Adv duration: 240
Valve lift: ???
Rocker ratio: 1.50
Valve lash: ???
overlap: 24


Observed cam specs in two engine teardowns (both engines April-66 castings with hydraulic lifters):

Cam lift: .260
Rocker ratio: 1.50
Valve lift: .390


"FP-31" dual-quad 318 cam, 1957 plymouth Fury

Intake Open: 16 BTDC
Intake close: 60 ABDC
Adv Duration: 256
Cam Lift: .290
Valve Lift: .435 Rocker Ratio: 1.50
Valve lash: .012

Exhaust Open: 60 BBDC
Exhaust Close: 16 ATDC
Adv duration: 256
Cam lift: .290
Valve lift: .435 Rocker ratio: 1.50
Valve lash: .012
overlap: 32