Ok, so tonight I started porting on the head. I did NOT port it before, and it was in 100% stock form,
as far as valves, ports, etc. Go. Here are the Flow Numbers. It took ALOT to get these ports like
this. These ports are actually maxed out. There are no more restrictions in the ports what so ever,
atleast not with these sized valves. With my new cams, Turbos and the increased Head Flow, I dont
see how 700+ hp is out of line.
To give an idea, a stock P90 flows 172, my highest modified P90 flows about 225 cfm. Plus the
dohc head is a cross flow.
Heres the numbers.
Intake Flow
lift Stock Modified
0.2 156.2 165.7
0.25 198.8 227.2
0.3 224.8 260.3
0.35 248.5 276.9
0.4 248.5 288.7
0.45 248.5 300.5
0.5 248.5 305.3
0.55 248.5 310.0
Exhaust Flow
Lift STOCK MODIFIED
0.2 146.7 151.5
0.25 170.4 182.2
0.3 182.2 191.7
0.35 196.4 198.8
0.4 201.1 208.2
0.45 201.1 217.7
0.5 201.1 222.4
0.55 201.1 224.8
as far as valves, ports, etc. Go. Here are the Flow Numbers. It took ALOT to get these ports like
this. These ports are actually maxed out. There are no more restrictions in the ports what so ever,
atleast not with these sized valves. With my new cams, Turbos and the increased Head Flow, I dont
see how 700+ hp is out of line.
To give an idea, a stock P90 flows 172, my highest modified P90 flows about 225 cfm. Plus the
dohc head is a cross flow.
Heres the numbers.
Intake Flow
lift Stock Modified
0.2 156.2 165.7
0.25 198.8 227.2
0.3 224.8 260.3
0.35 248.5 276.9
0.4 248.5 288.7
0.45 248.5 300.5
0.5 248.5 305.3
0.55 248.5 310.0
Exhaust Flow
Lift STOCK MODIFIED
0.2 146.7 151.5
0.25 170.4 182.2
0.3 182.2 191.7
0.35 196.4 198.8
0.4 201.1 208.2
0.45 201.1 217.7
0.5 201.1 222.4
0.55 201.1 224.8