Bone Stock 318 Magnum dyno run.

IQ52 said

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.

Click to expand...

So, not much to report as far as progress on the 318 rebuild, we don't get a great deal of time to work on our own stuff. But here however are the lastest results on the factory Magnum heads being prepared for the 318.

Lift...........this port stock........and after porting

.100"..............65 cfm.....................88 cfm
.200".............127.........................151
.300".............177.........................203
.400".............203.........................242
.500".............201.........................271
.550".............204.........................280

Going to be interesting when this 318 gets back in the truck.