OneFastQuest Posted July 8, 2008 Report Share Posted July 8, 2008 I got a new marnal head with OS stainless valves from Dad not to long ago, and i would like to know how much power its capable of without any porting or anything. Link to comment Share on other sites More sharing options...
Scotty Dont Posted July 8, 2008 Report Share Posted July 8, 2008 I got a new marnal head with OS stainless valves from Dad not to long ago, and i would like to know how much power its capable of without any porting or anything. no one is gunna be able to tell you, sorry Link to comment Share on other sites More sharing options...
NotStock88 Posted July 8, 2008 Report Share Posted July 8, 2008 I got a new marnal head with OS stainless valves from Dad not to long ago, and i would like to know how much power its capable of without any porting or anything. Best thing to do would be to take the head to a machine shop capable of flow testing it and have them tell you the rated CFM's are. I believe (correct me if I am wrong guys) but for every 1 cfm is roughly 2hp. Link to comment Share on other sites More sharing options...
Indiana Posted July 9, 2008 Report Share Posted July 9, 2008 Well you can put it in an old carbureted minivan or you could put it in a forced induction race car and spray some NOS through it what you going to do with it? The head doesn't make power it just lets air in an out of the cylinders. Link to comment Share on other sites More sharing options...
Dad Posted July 9, 2008 Report Share Posted July 9, 2008 I got a new marnal head with OS stainless valves from Dad not to long ago, and i would like to know how much power its capable of without any porting or anything. It will take anything that you want to put to it! Flow bench will tell you how it flows. Takes more than just a head to get high HP You have a good foundation to start with- now get some good slugs in that puppy! Dad Link to comment Share on other sites More sharing options...
macrophage Posted July 9, 2008 Report Share Posted July 9, 2008 Seems like everbody wants a Marnal head so Whats the benefit of a marnal head? over other NJV heads Link to comment Share on other sites More sharing options...
Scotty Dont Posted July 9, 2008 Report Share Posted July 9, 2008 Seems like everbody wants a Marnal head so Whats the benefit of a marnal head? over other NJV heads a better casting Link to comment Share on other sites More sharing options...
BrokenquestTSI Posted July 9, 2008 Report Share Posted July 9, 2008 better flow.............. Link to comment Share on other sites More sharing options...
OneFastQuest Posted July 10, 2008 Author Report Share Posted July 10, 2008 It will take anything that you want to put to it! Flow bench will tell you how it flows. Takes more than just a head to get high HP You have a good foundation to start with- now get some good slugs in that puppy! Dad Cool.. i just wanna know couse me and my father are building up the car. So for we have a freshly rebuilt motor, haltech F10X, modded magna manifold, Precision T4 TO4S Turbo, aeromotive a1000 fuel pump and AFPR , and 1000cc injectors ( Yea a bit much i know). also got wiesco pistons 40 over and pauter rods. i know ima get the head ported in the very near future but the heads on already. will post pics of the car in the Engine and Performance Mods section pretty soon, just need my camera back from my friend. Link to comment Share on other sites More sharing options...
Scotty Dont Posted July 10, 2008 Report Share Posted July 10, 2008 someone built a billet al. head for their drag car anyone remember/have pics Link to comment Share on other sites More sharing options...
BrokenquestTSI Posted July 12, 2008 Report Share Posted July 12, 2008 i cant wait to install my marnel........no porting yet though Link to comment Share on other sites More sharing options...
Caliber308 Posted July 13, 2008 Report Share Posted July 13, 2008 (edited) Heres a rough estimate on the CFM gains: Stock Head: 151 cfm. NJV Head: 165 cfm Mild Ported Marnal: 188 cfm Heavy ported Marnal: 211 cfm As far as Horsepower gains, no one can tell you what to expect. CALIBER 308 Edited July 13, 2008 by Caliber308 Link to comment Share on other sites More sharing options...
OneFastQuest Posted July 13, 2008 Author Report Share Posted July 13, 2008 Ok, cool guys, thanks for all the input Link to comment Share on other sites More sharing options...
jahjah Posted July 14, 2008 Report Share Posted July 14, 2008 Heres a rough estimate on the CFM gains: Stock Head: 151 cfm. NJV Head: 165 cfm Mild Ported Marnal: 188 cfm Heavy ported Marnal: 211 cfm As far as Horsepower gains, no one can tell you what to expect. CALIBER 308 any idea what a magna flows? Link to comment Share on other sites More sharing options...
Caliber308 Posted July 15, 2008 Report Share Posted July 15, 2008 any idea what a magna flows? Stock 2nd gen Magna: 187 cfm. CALIBER 308 Link to comment Share on other sites More sharing options...
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