300 Head Info
Thread Starter
|
Freshman User
Joined: Feb 2003
Posts: 29
Likes: 0
From: Tyler, Texas
300 Head Info
Does anyone know how much CFM a 300 Head will flow, intake and exhaust? And does anyone know what can be done to a stock 300 head to make it breath better and make more power?
Posting Guru
Joined: Jun 2002
Posts: 1,288
Likes: 1
From: redding U.S.A.
300 Head Info
well you can port the head if you want, and get it extrusion honed but thats a lot of money. You can just port polish it yourself with a dremel or similiar rotary tool (preferably an air grinder).
the 300 head... well it sucks. Once i get the time, and the weather warms up, my head is gettin a tune up.
the 300 head... well it sucks. Once i get the time, and the weather warms up, my head is gettin a tune up.
Senior User
Joined: Jul 2001
Posts: 470
Likes: 0
300 Head Info
INTAKE
0.100 - 51
0.200 - 68
0.300 - 79
0.400 - 88
0.500 - 96
0.600 - 99
EXHAUST
0.100 - 27
0.200 - 47
0.300 - 64
0.400 - 72
0.500 - 76
0.600 - 78
Tested with 1.784" intake and 1.560" exhaust valves at 10 inH2O pressure drop.
(these aren't my numbers, they were posted BC (Before Crash) of Fordsix boards)
-=Whittey=-
0.100 - 51
0.200 - 68
0.300 - 79
0.400 - 88
0.500 - 96
0.600 - 99
EXHAUST
0.100 - 27
0.200 - 47
0.300 - 64
0.400 - 72
0.500 - 76
0.600 - 78
Tested with 1.784" intake and 1.560" exhaust valves at 10 inH2O pressure drop.
(these aren't my numbers, they were posted BC (Before Crash) of Fordsix boards)
-=Whittey=-
Senior User
Joined: Jul 2001
Posts: 470
Likes: 0
300 Head Info
INTAKE
Lift - 10 - 28
inch - h20 - h20
----------------
0.100 - 51 - 85
0.200 - 68 - 114
0.300 - 79 - 132
0.400 - 88 - 147
0.500 - 96 - 161
0.600 - 99 - 166
EXHAUST
Lift - 10 - 28
inch - h20 - h20
----------------
0.100 - 27 - 45
0.200 - 47 - 79
0.300 - 64 - 107
0.400 - 72 - 120
0.500 - 76 - 127
0.600 - 78 - 131
I added the 28 inH2O line as a comparison, as thats how most heads are flowed for comparison purposes. I used this equasion: sqrt(vac2/vac1)*flow1=flow2.
For more comparison, here are some lightly ported Trick Flow Twisted Wedge heads from a 351 (shamelessly stolen from toohighpsi.com). Now mind you, each of these ports has to feed less than a 300's ports do....
INTAKE - 2.02" valve
28 inH2O pressure drop
0.100 - 65
0.200 - 130
0.300 - 205
0.400 - 240
0.500 - 238
0.600 - 234
0.700 - 230
EXHAUST - 1.60" valve
28 inH2O pressure drop
0.100 - 50
0.200 - 102
0.300 - 133
0.400 - 160
0.500 - 180
0.600 - 185
0.700 - 195
Starved.
-=Whittey=-
Lift - 10 - 28
inch - h20 - h20
----------------
0.100 - 51 - 85
0.200 - 68 - 114
0.300 - 79 - 132
0.400 - 88 - 147
0.500 - 96 - 161
0.600 - 99 - 166
EXHAUST
Lift - 10 - 28
inch - h20 - h20
----------------
0.100 - 27 - 45
0.200 - 47 - 79
0.300 - 64 - 107
0.400 - 72 - 120
0.500 - 76 - 127
0.600 - 78 - 131
I added the 28 inH2O line as a comparison, as thats how most heads are flowed for comparison purposes. I used this equasion: sqrt(vac2/vac1)*flow1=flow2.
For more comparison, here are some lightly ported Trick Flow Twisted Wedge heads from a 351 (shamelessly stolen from toohighpsi.com). Now mind you, each of these ports has to feed less than a 300's ports do....
INTAKE - 2.02" valve
28 inH2O pressure drop
0.100 - 65
0.200 - 130
0.300 - 205
0.400 - 240
0.500 - 238
0.600 - 234
0.700 - 230
EXHAUST - 1.60" valve
28 inH2O pressure drop
0.100 - 50
0.200 - 102
0.300 - 133
0.400 - 160
0.500 - 180
0.600 - 185
0.700 - 195
Starved.
-=Whittey=-
