In another thread, I described a 352 I'm working on. Quick summary, it's an old 352 shortblock my father ran in a dirt track stocker in the mid 60s. 352 block and crank, LeMans rods, Jahns 332 pistons, 246* HiRiser FoMoCo cam, and it has one C3 427 head and a C1 generic head on it when I got it. It also has two .050" cylinders and the rest are .040", with .040" pistons all around...this is definitely a cheapie build but I want to keep it as is for my father.
I bought another C1 head and tried my hand at porting the intake ports, then sent off to Les Schmader to look over and make sure I didn't screw them up, and do guides/valvejob and ported the exhaust as I didn't have time to finish up. I cobbled together spring/retainer/lock package from TFS takeoffs, and Ferrea 11/32" 2.15/1.65 valves.
Les said the ports were ok, he did clean up the guide as I just couldn't get a cutter on them that didn't chatter like hell, otherwise my shape was used. He smoothed them up a bit but they're definitely not as nice as his work I saw in the shop and on the exhausts he did, I definitely need to get a steadier hand. Admittedly, I didn't go through a lot of calcs to get throat size to match CI and flow requirements, this is my first port work besides some 460 exhaust port work to remove thermactor humps, so I just wanted to dig in and get a feel for it. I did try to widen the short turn to slow it down over the low floor, and raise the roof a bit. I didn't touch the floor other than knock casting flash and junk off. I worked on a "bump" in the vertical wall short turn quite a bit as it forms a "ski jump" in the middle of the port, and some rough transitions into the bowl. I did take out the bumps for the rocker bolts, which seems to be a mixed opinion on these, but I wanted to raise the roof and they have to come out to do so. Learned a lot, learned I really don't have a smooth hand with the grinder yet, and want to keep doing more now that I've recovered.
Immediate things I notice with the closeups, how chewed up the port edges look, need to keep the cutter moving. Also, the corners are getting too much grinder time and there is less metal taken on the flat surfaces causing a "bow" on long flat surfaces. Not sure it hurts flow or not, but something to try to improve on.
.200 168cfm 115cfm
.300 250cfm 155cfm
.400 263cfm 179cfm
.500 284cfm 193cfm
.600 295cfm 198cfm
.700 298cfm 202cfm