Z-Gad Posted February 22, 2006 Share Posted February 22, 2006 Just thought I would attach a couple of in progress pictures of Jim Langdon's (Dover Cylinder Head here in Orlando) portwork ... (note bowls haven't been touched yet). My intake manifold and gasket will be raised slightly to give a 'straighter' flow angle into the combustion chamber. Also note the 'V-shape' around the valve guides to allow better flow. Here are a couple of photos of one of the intake ports under construction... http://album.hybridz.org/showphoto.php?photo=6029&cat=500&size=big&ppuser=7981 Quote Link to comment Share on other sites More sharing options...
Jeff Posted February 22, 2006 Share Posted February 22, 2006 Looks nice Mike. Jim does great work and I'll have him do my LT1 heads one of these years. He is also very helpful when you're about to take a bad fall coming down from his storage area. For everyone else besides Mike this reference is about me trying to carry a partial front 240Z clip down a rather steep set of stairs exiting Jim's storage loft. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted February 22, 2006 Share Posted February 22, 2006 I don't know about these heads in particular, but I always heard that you want to avoid the V shape on the front side of the valve guide, and that it was better to have a rounded shape there and a V shape on the back side if at all. That being said I don't run a cylinder head shop either... Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted February 22, 2006 Author Share Posted February 22, 2006 Actually, it V's over the guide on both front and back sides ... I wonder why you would not want to direct the air around the valve and guide (not having the apex in front of the valve as well...) Quote Link to comment Share on other sites More sharing options...
Guest asad137 Posted February 23, 2006 Share Posted February 23, 2006 I wonder why you would not want to direct the air around the valve and guide (not having the apex in front of the valve as well...) You do want to deflect the air, but at subsonic flow velocities, a V isn't the optimal shape. A teardrop shape (with the rounded end facing the flow) is the most aerodynamic shape. This of course changes as flow velocities get higher. Asad Quote Link to comment Share on other sites More sharing options...
JMortensen Posted February 23, 2006 Share Posted February 23, 2006 You do want to deflect the air, but at subsonic flow velocities, a V isn't the optimal shape. A teardrop shape (with the rounded end facing the flow) is the most aerodynamic shape. This of course changes as flow velocities get higher. This was my impression as well. Quote Link to comment Share on other sites More sharing options...
Garrett76Zt Posted February 23, 2006 Share Posted February 23, 2006 hey its lookin great Mike! Maybe you car will be fast now. Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted February 24, 2006 Author Share Posted February 24, 2006 You do want to deflect the air' date=' but at subsonic flow velocities, a V isn't the optimal shape. A teardrop shape (with the rounded end facing the flow) is the most aerodynamic shape. This of course changes as flow velocities get higher. Asad[/quote'] Asad, that is very interesting. I will not go second guessing the head porting that is being done at this time as I trust he knows what he is doing, but I will log that to memory for future consideration. I will post CFM flow numbers once they come available. ~Mike Quote Link to comment Share on other sites More sharing options...
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