New Magnum heads for 347 with Flow data

After the backcut I really wanted to perform a rudimentary bowl blend. When I say rudimentary I mean less than 5 minutes with a carbide. Again we start to see massive improvements only to be thwarted by turbulence. I know where the cork is.

.1 63
.2 130
.3 180
.4 201
45 194
.5 193
.6 193

So while turbulence is occurring sooner the port doesn't stall all that bad. This can be improved upon easily--The question is--What kind of flow characteristics do we need out of these heads to make the power required?

So 347 cubes and let's say 375hp and 400+ ft/lbs from 2500-5000 rpm. What do you guys say it needs?

Here's a crappy pic of the bowl blend job. J.Rob


What's the aim for lift or limit?

What gear and accessories?

Flow them with the intended intake manifold.

220 cfm by .400-.450 will easily make 375 hp with a cam in the 220's @.050 and .475 lift.
Exaggerate to end up where you need to be.