Slight hijack......
The tale of two flow benches.......
Similar capacity benches, operating on the same basic design, but not the same bench manufacturer.
Intake:
Lift———A/B
.100—-70.5/67.5
.200—139.1/142.8
.300—203.2/207.6
.400—237.5/241.2
.500—252.8/256.1
.600—255.5/260.6
Exhaust:
Lift——- A/B
.100—-76.1/57.1
.200—124.3/111.0
.300—159.3/150.0
.400—177.4/167.1
.500—179.3/170.8
.600—181.4/174.4
What’s interesting to me is one bench shows higher on the intake, the other shows higher on the exhaust.
The other thing is, the low lift exhaust flow on bench A is in la-la land(why would the exhaust outflow the intake port at that lift, with its 14.5% less flow area?)
On the intakes, the two benches are within 2-2.5% at all lifts.
On the exhaust there is a 33% discrepancy at .100 lift, and 12% at .200 lift....... tapering off to 4.5% at .600 lift.
The intake curves would be very close, the exhaust not so much.
But, to bring it back on topic....... if all you’re looking to do is build a 408-422” stroker to make 575hp or less, i’ll take the “cheaper and easier to get parts for, closed chamber for good quench, doesnt need expensive offset rockers, uses normal headers” RPM heads.
