Ahhh..porting p0rn....

So, totally a DIY job here, a couple of stages (these were not my 1st set of heads to be ported, but obviously I'm no guru). Along with the pics I will post the flow numbers, be what they are (done at the same shop, by the same guy both times) I thought the 2nd set was awefully high for a factory head.

1) Alright, so this was the result of my 1st stage...


2) And here is the 2nd stage, basicaly did a both of work around the guide boss on INTAKE side only, slimmed it down to just a thin area to support the bronze guide and contoured the roof by removing a significant amount of that guide-to-roof transition


The results are:

LIFT I_1 I_2 E_1 E_2
0.100 67 67 57 57
0.150 99 102 79 79
0.200 130 138 104 104
0.250 162 175 125 125
0.300 189 205 140 140
0.350 215 232 152 152
0.400 235 253 160 160
0.450 253 267 167 167
0.500 262 282 172 172
0.550 261 291 175 175
0.600 248 283 177 177