S4 head port sizes?
01-12-2016, 08:15 PM
#31
Except that my intake manifold 'project' actually delivers - you know - much improved performance for a reasonable cost.
What my project performance has shown is that the entire intake tract (air filter to port) is actually a giant choke, so ... there is little logical point in finessing port flow c/- CFD analysis, while an upstream flow choke is swamping the reliability of your design results.
Re my "systematic campaign" ? Gee Ptuomov - I thought Rennlisters following this type of thread were looking to increase the engine performance of their cars (at minimal cost), irrespective of the method: eg cams. port flow, air filter flow, header design, plus X or Y pipe, and so it goes ...
While I acknowledge your analytical efforts, unless they eventually result in construction of shiny metal performance bits, what is their point?
I was totally lucky, in that Porsche had done such a horse's *** of a job within the aero flows of the S4+ manifold, that even blind Freddy, (missing one eye and blind in the other), could have managed some sort of flow improvement. Which I managed. Whew.
I seem to remember, in our earlier discussions, that my intake flow mod was the only mod to be found on the 928 forum that actually delivered a no-kidding, economical, bang-for-buck, grin on your face, performance gain.
Nothing magical about what I have done (unless you count the endless hours studying CFD analyses, plus the resulting understanding), except that I was lucky enough to be in the right place/right time to benefit S4+ owners.
Cheers.
Upfixen.
What my project performance has shown is that the entire intake tract (air filter to port) is actually a giant choke, so ... there is little logical point in finessing port flow c/- CFD analysis, while an upstream flow choke is swamping the reliability of your design results.
Re my "systematic campaign" ? Gee Ptuomov - I thought Rennlisters following this type of thread were looking to increase the engine performance of their cars (at minimal cost), irrespective of the method: eg cams. port flow, air filter flow, header design, plus X or Y pipe, and so it goes ...
While I acknowledge your analytical efforts, unless they eventually result in construction of shiny metal performance bits, what is their point?
I was totally lucky, in that Porsche had done such a horse's *** of a job within the aero flows of the S4+ manifold, that even blind Freddy, (missing one eye and blind in the other), could have managed some sort of flow improvement. Which I managed. Whew.
I seem to remember, in our earlier discussions, that my intake flow mod was the only mod to be found on the 928 forum that actually delivered a no-kidding, economical, bang-for-buck, grin on your face, performance gain.
Nothing magical about what I have done (unless you count the endless hours studying CFD analyses, plus the resulting understanding), except that I was lucky enough to be in the right place/right time to benefit S4+ owners.
Cheers.
Upfixen.
