Flow Numbers Needed

[timboamx]

Anyone have any flow numbers for stock dogleg heads? I am in the process of porting my heads (to save a few bucks) but need to eventually get the heads flow matched so I can get the best possible cam.

Thanks in advance,

Tim

[jeepsr4ever]

what number heads?

[timboamx]

3220502-2 from a 74 360.

[fuzz401]

some thing I found

AMC 2.02 valve heads:

Intake:

291 090 502
.100 71 74 70
.200 127 156 143
.300 179 201 192
.400 209 219 213
.500 217 226 220
.600 222 232 228
.700 228 238 236

Exhaust:

.100 55 56 59
.200 107 112 113
.300 135 141 146
.400 142 145 150
.500 145 149 152
.600 145 150 153
.700 145 151 153

The 291's are 3196291, 1970 51 cc chamber heads, the 090's are 1973 58 cc heads, and the 502's are 3220502 1974 60 cc heads, I have tested an example of all 3 combustion chamber sizes. The 291 and 090 heads have a multi angle valve seat, the 502's are utterly stock. There is no porting on any of these. They were all tested as identical as I could make it - same port, valves, inlet radius plate, flow bench, day, operator, and bench temperature. The correction factor for the bench temperature is a reduction of 1.6%, I couldn't be bothered adding it in.


All the flow numbers are at 28" to be the same as most of what you see in the magazines. The bench was a SF110, which can't test at 28", so most of the testing was at 7", converted to 28". I had the calibration orifice and I have had some of the same heads on a SF600, so I have reasonable confidence in the calibration. One thing I did not add in was the temperature correction factor, which would lower the numbers about 1.6%, I just couldn't be bothered. This would apply to all the testing, I made an effort to be consistant in machine temperature.

[timboamx]

I really appreciate it. At least I will have something to compare it to when I get the heads matched...

Thanks,

Tim

[jeepsr4ever]

Tim those 502's are about the classic version of the more common dogleg head. They are a great little head and can take some mild porting. I have a couple sets laying around and will be porting heavily soon after I sonic check them. I will let you know my outcome