Bone Stock 318 Magnum dyno run.

Hebrews10:26 said
They werent all that to begin with , but not bad for 300k.

How much flow do you get out of magnum heads and how much time did it take to figure it out, how many castings you may have gone through?

We haven't gone all out on a Magnum head yet. The 360 Magnum we had on the dyno had some mildly modified Magnum heads.

Lift................Stock INT.............Ported INT

.100..................63.........................75
.200.................123.......................137
.300.................179.......................191
.400.................211.......................229
.500.................211.......................256
.600.................212.......................256

We've been able to put the J heads to 270 cfm @ .500" and 292 cfm @ .600" so I see no reason not to believe the Magmun won't go at least that much.