March 13, 2003
Flow testing: 28” H2O
Custom made Ferrea valves:
Intake valves: 33mm (head diameter) X 97.5mm (stem length) with a 6mm diameter stem
Exhaust valves: 28mm (head diameter) X 98.5mm (stem length) with a 6mm diameter stem
Intake: 1.300” head diameter 6mm stem
Light port work, seats machined with 5 angles
45º Seat
¾” radius inlet
|
Valve Lift |
Setting1 |
%2 |
Flow (CFM) |
Gain (CFM) |
|
.100” |
199 |
46.5 |
83.58 |
8.95 |
|
.200” |
199 |
86 |
157.21 |
13.93 |
|
.300” |
296 |
70.5 |
180.56 |
28.12 |
|
.400” |
296 |
72.5 |
183.52 |
31.08 |
Exhaust: 1.100” head diameter 6mm stem
Light port work, 3 angles & radius on seat
45º Seat
|
Valve Lift |
Setting1 |
%2 |
Flow (CFM) |
Gain (CFM) |
|
.100” |
106 |
63 |
66.78 |
2.12 |
|
.200” |
208 |
55 |
114.40 |
6.24 |
|
.300” |
208 |
66.5 |
138.32 |
13.52 |
|
.400” |
208 |
70 |
145.60 |
18.72 |
Notes:
1 The setting value refers to the maximum flow setting on the flow test machine
2 The percent is the amount of the maximum flow setting that was used for the test (For example, Setting = 300 cfm, % was 50, then the actual flow used to test would be 150 cfm)