randy Posted January 18, 2012 Report Share Posted January 18, 2012 How much more does a magna head flow than a marnal head?I see every so often these heads pop up and the sellersay's these flow more than a ported marnal head. Link to comment Share on other sites More sharing options...
Frenchi934 Posted January 18, 2012 Report Share Posted January 18, 2012 I think it depends on which magna head you get. there were several iterations. Link to comment Share on other sites More sharing options...
Chad Posted January 18, 2012 Report Share Posted January 18, 2012 The M6, M7 and M8 are the ones to get, the port geometry, specificaly at the valve seat is superior. I haven't flowed one personaly, but several others have and the mumbers all say about the same things you jsut stated. Just from looking at it, you can tell it's a better flowing design. the M-9 is a rare high compression head, but the port geometry is the same as the M6,7,8's. Link to comment Share on other sites More sharing options...
KrazedZ Posted January 18, 2012 Report Share Posted January 18, 2012 I'm curious about these magna heads myself, i've only seen pictures of the ports and from what i can see, is they are pretty much the same configuration as a stock/marnal/m28, the seats appear to be in the same location as well as the entry point on the intake side meaning that they all have a poorly designed runner, but it is what it is for this style head.I haven't flowed a magna head, but i have flowed the others and they all are pretty much the same except for the aftermarket ones being thicker in material. Link to comment Share on other sites More sharing options...
Chad Posted January 18, 2012 Report Share Posted January 18, 2012 on the magna, the port floor is raised and radiused where the stocker is just a flat sharp shelf (vey turbulant). The inlet and valve seats are in the same location, but the runner is differently shaped. It's designed for more laminar flow to the valve seat. Link to comment Share on other sites More sharing options...
Bag-O-Chips Posted January 18, 2012 Report Share Posted January 18, 2012 sadly I'm Selling one... Shameless plug... Link to comment Share on other sites More sharing options...
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