Reviving some old W2's

RAMM said
This set of heads still used the 3/8" stem and the guides were wasted. A chat with the customer and the decision was made to install bronze guide liners and move to a set of 2.055"/1.6" Ferrea valves with a 11/32" stem. This makes guide sizing easy and accurate. It also makes moving the valve seat "up" possible and lightens the valve up and provides flow increase potential.

It had been awhile since I ported on iron and wow was it slow removing metal. The final flow results were a little lower than what the customer was hoping for I think but I am not of the "Hog it out and make it bigger crowd". I know what a W2 can do with these flowrates and its impressive. J.Rob

New flow

.100 68.6 52
.200 136.3 113
.300 193 163
.400 236 191
.450 255
.500 270 201.2
.550 282
.600 286 209.3
.650 274
.700 276 212.5

View attachment 1715104745

To this day I cannot install or ship out a set of heads that starts backing up at .650 or possibly even .625. That’s when I aggressively start checking port air speeds because I know if and when I find the issue there are big cfm benefits to be gained. 300 plus are there even with a 3/8 stem 2.02 valve. Then again this is probably why I quit porting for others because I usually charged 600.00 or less to do a set and at one time it was more fun than it is today. Congratulations on running 10.40’s and can you tell us more about the engine and some car details.