EQ magnum cylinder head stock, flows and air speeds. Easy 400hp 360? 

I learned that I’m on a small block Mopar forum with Addison who owns these heads, nice guy and just thought you should know he’s singing your praises on there , sharing your video links to the work you did on these etc. I was glad to see it and thought you should know Charlie, nice job! 👏👏

I made 400hp (based on ET/MPH/vehicle weight) with a standard bore 318, back in 2001 with a 5.2L 318 Jeep warranty engine that I freshened up (rings on deglazed cylinders/bearings on polished crank) with a M1 single plane intake, small tube headers and a 750 vacuum Holley. I used a small (then custom ground only, not shelf stocking) Comp Cams 270HR cam (218/224*@.050") and 1.6 ratio Ford pedestal type adjustable rockers (Blue Racer brand!) which gave about .530" lift. SImple and cheap, really not much below 3000rpm but a real hellion from 3500-7000rpm!! No head porting, just a good valve job and MoPar .600"-capable valve springs and retainers (not beehive!). Getting 400hp (and a ton more torque than my 318) from a 360 should be easy with those heads, ported and a decent camshaft with an RPM intake. Thanks for posting!!

Hard to believe the stock castings had that much as cast flow potential ..thank you for the great vid ..

I have a set of untouched CH318b heads. They flowed in the 253 cfm range at 0.550” lift. That was with a Hughes intake valve. They backed up to the 236 range with Ferrea valves. I wasn’t sure about the Hughes valves, so that is why we went with Ferrea. This was for a Bmod engine endurance engine.

LOL! Shinnny! Nice and strong numbers on the replacement as cast head.

Love this stuff! Especially magnums! Thanks

Looking forward to seeing more of this project.

These are good heads, I have seen a few good porters get these to 300 cfm with 2.055 and 2.080 valves, 400 HP easy money. Thanks Charlie

I did the first 5 angle valve grind I have done in awhile today. I guess you inspired me to get to work!😊

AMC design taken over by Dodge and called Magnum. they respond well to 2.02 Intake valve and full porting.

Well that looks promising. I don't see why a guy can't get 260 cfm out of these with a good valve job and little work.

Flowing like a good set of ported E7s...Those should do 400hp stock.. Message the low/mid lift numbers and those would be torque monsters with a low duration torque cam.

So that means that those heads flow a lot better than 340 heads.

Any data on the Chinesium castings?

The lack of shrouding in the chamber looks pretty good too yeah?

They have no ridge behind the guide

first here and the fourth thumbs up.

There is more area between the seats

The problem with magnum heads isnt the intake pinch, its the shortside radius's and the shrouding on the valves..... deshroud both valves and clean up the short sides and around the guides and the increases are substantial.... back cut the valves while you're at it