| Re: Interesring article on fluid dynamics and airflow |
Subject: Re: Interesring article on fluid dynamics and airflow by jsup on 2008/11/23 0:17:01 A bit more, and I'm still researching this: When I decided to take on learning as much as I could about head design, I spoke to engineers. Now understand, I am talking only about design, not modification. For example, you can pick parts from a catalog and come up with a good finished product. HOWEVER the people who put those products in the catalog need to design them first. For means of clarification, picking parts out, matching them up, and screwing it together is not DESIGN. Design starts with a clean sheet of paper and ends with products that people buy, and screw together. We talked about dry flow and have unanimous conclusion that for DESIGN purposes it serves little value. A dry bench can demonstrate how youve modified from where you are to where you want to be. But again, as a DESIGN tool has little value. A head can not be designed on a dry bench. It is one antiquated method which measures one relatively useless metric. Enter the wet flow bench. A decent solution, as it allows engineers to design a part on paper then test the theory in real life. Certainly light years ahead of dry flow as it speeds production, development, and time to market. Brings better products to market faster, and less expensively. Thats why most head manufacturers use it. Still not the ultimate solution, it still falls far short. The issues with these technologies as outlined to me had to do with both technologies inability to measure in the operational environment which the motor is intended to run. By this I mean you cant be inside the motor at 4000, 5000, 6000 RPMs. If there is a breakdown in the design there is no way to find that out scientifically, only guessing. Well, the other day, when reading Wess thread, I came across a machine that does just that, allows engineers to see what happens under the operational conditions the motor runs at. This happens to be a Dart reference. And PLEASE I beg you all to keep the conversation central to how these technological advances will improve the price/performance and quality of deliverable parts to guys like us. I dont care which manufacturer is using what technology. I just found it interesting that the primary obstacle as outlined to me seems to be being resolved. This is the first time Ive seen it. As far as I know, there is no head manufacturer which looks at how their product performs during an operational cycle. When I can track down this machine, I'll post the link. Just can't locate it now. This is the FINAL way to design a head, as it is the only way to see wtf is going on under operational conditions. |
