The starboard air scoop came off for some stuff and some intersting things came up on close inspection. Well, upon disassembly of the starboard side scoop, it has a smaller intake opening and is more complicated than you may think. The intake scoop opening itself is only about 1/3 of the total scoop area or less, about 4" x 3", with other air being ferreted off to cool in front of the front cylinder head from the front part of the scoop and around the vapor recovery cannister from a small duct in the rear. The big discovery for me was that the airscoop has a built in resonance chamber at the bottom of the middle engine airflow inlet tract vented by two holes. Don't know why else that chamber would be there. The size of the inlet and the resonator makes me wonder is there would be a better wat to get more air to the air filter. Here's a pic in case you never ever actually get to see it. Image Unavailable, Please Login Image Unavailable, Please Login
so what it seems we're sayin is the scoop ducting changed about every model. That's pretty amazing if you think about it.
I'm with you. Any sheet metal company could do up an aluminum duct in a day or two for about $150. I just had one done but it is not applicable to the stock aircleaner. Image Unavailable, Please Login
Fair amount of profit then. A sheet of 1mm aluminium (8' x 4') is about $30. You could easily cut, fold and pop-rivet that intake yourself, just make a cardboard template first.
I tried that, but wanted a bit heftier piece (3mm) of aluminum, and my home made sheet metal break was not up to the task of the thicker piece. They even ended up welding a couple of the angles. That all said, you are right: I think they did quite well off of me. I need to learn how to weld. Really. I always am finding some little something that would be so easy to do if I could just throw a little weld on there.
3mm is probably a bit over the top. I would have used 1mm and stiffened it externally where needed with aluminium angle, which would be a lot lighter. Check how I made the one-piece engine/trunk cover in the Mondial Z thread. That is only 1.5mm aluminium sheet and it is very stiff because of the 2 angle stiffeners and the hammered-over lip.
Being an avid follower and supporter of the immense and painstaking work you have done on the Mondial Z construction, I am equally immensely amused that you would describe my 5" aluminum air duct as 'over the top'.
I wish there was a way to know if the injectors can keep up with the increased flow short of running around with a wide-band A/F sensor. Or do we we know that the injectors operate at only, say, 80% capacity and that the chip just holds it back....?
That may be the case, and maybe a bigger plennum chamber (GTB vers) would help. Maybe this should be thrown over into Tech section ?
