Quote:
Originally Posted by adam728
If you are going to venture into header design, do yourself a favor and purchase Pipe Max ( PipeMax36xp2 ). I am unaffiliated, but it is highly regarded at Speed Talk forums, by guys that live and breathe this stuff. From dirt track to Nascar to 4000 hp pro drag cars, there's a lot of big engine builders on there that know there stuff, and trust the software. |
Cheers for that, I've been looking at finding some more comprehensive software. Could be handy to get closer to the ballpark than the formula approach, and it looks relatively affordable, I might just get it. Really what I'd like though is something which actually does FEA of the gas in the pipe, so I can 'touch' it and try unconventional things
- something like like WAVE (but it's about $500) or the GasDyn software developed by the Politecnica de Milano (but I don't think they even *sell* that one, I suspect you have to have a partnership with the university)...
Quote:
Originally Posted by adam728
Header design is a lot more than target an rpm and pick a diameter/length. Everything from camshaft timing & overlap, to EGT and engine displacement effect what the "best" exhaust is. Collector design is very important as well, be it a straight diameter/length, or getting into merge collectors with taper and volume coming largely into play.
|
Indeed - rpm and resonant frequencies isn't a bad place to start in figuring out a ballpark total size, of course
but yeah, there is indeed a lot more to it, as I'm discovering.