flow results
LS 317 head with 2.00 intake and 1.55 exhaust
last night I did 2 ports, one the runner only with carbide cutter so it has dimpling similar to golf ball
the second was runner, bowl and chamber and finished with sand paper roll
Neil came over to help and verify results
stock port
.1 70
.2 144
.3 195
.4 230
.5 233
.6 236
runner only with carbide cutter
.1 75
.2 146
.3 200
.4 242
.5 265
.6 276
whole port and chamber sand rolled
.1 71
.2 143
.3 203
.4 242
.5 272
.6 280
the hump from the rocker bolt was not removed nor was the swirl hump near the guide on any port
I use to remove the swirl hump and I'm not sure how much of a difference it makes but Dupree has a set I did for him a long time ago that I will test
all and all, the 40 cfm increase should equate into a 60 hp increase on a mild build, 80 hp on higher comp, big cam engine
one more thing, Neil brought over 2 efi intakes, IMO, the intakes could use a gasket match, or better yet, just make the whole port wider like I'm capable of doing with carb based intake setups matched to the felpro paper gasket
__________________
|