I've always been a big fan of the 360 CS and have decided to undertake an initiative to CS-ize my car. More on that soon. One of the pieces that always struck me on the design of the CS was the functional air intake and i was excited to see that RMR offered a replica CS Intake. I installed it last week along with the CS TCU tune and wanted to share both driving video (short, will have a better video with some better intake noise). Initial driving impressions -- in car with the Tubi exhaust it's not immediately noticeable sound, but windows down you can definitely hear a noticeable difference. I have not dyno'd the car so i can't comment on performance, but i love the design and enhancing the sound and it was worth it to me. Not affiliated, but I know @RANDY6005 is a member here. Getting installed: Image Unavailable, Please Login Image Unavailable, Please Login outside view: Image Unavailable, Please Login closer: gasket was included Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Finished product, up close: Image Unavailable, Please Login Entire engine bay: Image Unavailable, Please Login
Okay, forgive my ignorance, but what about the CS intake makes it "functional" implying that the standard Modena is not? I'm confused.... Also, what is the purpose of the three small holes in the duct work where it bolts up to the quarter panel? I have the carbon fiber duct from a Challenge car and it is completely open, same size as the opening on the panel. Confused and tired....
Sorry i guess i should say "improved air intake" instead, because you're right of course, the scoop is "functional" regardless if there's a box behind it -- it's just something i personally appreciate about the design, the "ram air" concept of the air scoop feeding right into the intakes -- it's just one of the things that personally struck me when i was first dreaming of this car and reading about the CS design. My understanding - the stock 360 air intake system has a hole about the size of a silver dollar that allows water to exit from washing and rain water. At the of bottom of the air box two small holes to drain water as well , The challenge carbon fiber air intake has a small hole as well, less than the size of a dime. I am not the designer but i would presume these are for drainage as well.
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Function wise, all three versions (Modena/Spider/Challenge Stradale) are the same. All three use an aluminum base that is painted either black or silver depending on the model, with the CS having the carbon fiber lids. All three of them have the hard pipe with the Helmholtz resonator which is slightly different for each of the models. The 360 Challenge (actual race car) is the only one with the flex tube, since intake noise really wasn't a factor in the full on race car. Several people, me included have just removed the Helmholtz resonator and filled/plugged the holes either by taping over them or sealing the up somehow. Just a different way to do things. There are drain ports in all of them, with the drain in the Modena being rectangular shaped just past the opening if I recall. I can't speak to the Spider or Challenge Stradale as they each have different P/N's for the intake tube/Helmholtz resonator tube. The Challenge inlet is about a 1/2" hole and I would presume it was for water as well. Just my opinion, it looks a little strange to have the three holes facing the front instead of opening up the entire structure. Really, for water to be sucked into the engine, through there, would take a deliberate act, since the airbox has such a large volume, and the box itself has drain holes as well. Not to mention, the water would have to make it's way past the filters as well. I don't have any test data showing this, but it's been claimed that adding just the Challenge style intake will increase power by given the car a "ram air" type setup. I have some issues with this. The first being, to increase the pressure of the airbox, thus creating a ram air system, it would have to be sealed, which it is not. Also, it is a very large system, that moves and flexes which does not help when trying to create a ram air effect. Also, it's been stated up to 20hp can be gained by this. I'm not doubting that some gains might be realized. However, it's been stated by several sources that the mirror stalks are the limiting factor as they disrupt the air flow going into the intake duct. This is why the CS has the uber expensive carbon fiber stalks and why the 430 has the dual stalks. Also, this limiting factor is relevant only at track speeds or those speeds that will get your car impounded and you a trip to the gray bar motel.
RMR looks like they copied the 360 Challenge care not CS IMHO the in take tube the RMR uses should not have that gap, less air that can make it in the air box just make sense. I had to have cut the front of the air box back so the opening can match the bigger air intake tube from 360 Challenge and weld in aluminum ring.
With the gruppe m box it fit perfectly Image Unavailable, Please Login Sent from my SM-N975U using Tapatalk
I am not sure that device is in fact an actual Helmholtz resonator. I have designed loudspeakers with a Helmholtz resonator concept, and there are two (2) separate chambers within the box tuned an octave apart based upon the free air resonance of the driver. This appears is more of a wave interrupter then an actual Helmholtz as was found on many foreign car exhaust systems before the main exhaust muffler I believe this device operates to attempt to stabilize the incoming air resonance I do believe that a free air flow such as demonstrated with the flex pipe is going to offer better intake air flow however So I think an uninterrupted tube is the best choice.
Can someone tell.me what size hose is needed to modify the factory Modena intake. Basically cut off the original resonator.
Let me get this straight for those who did it 5 inch Neoprene Single-Ply Air Duct Hose 2x 5 inch adjustable clamps Cut off the original air duct attached Image Unavailable, Please Login
You can find on Amazon or just google aluminum turbo 5inch tube elbow fit it up and us a 10inch chop saw and cut it to fit. hand held metal saw blade. HPS sales 5inch silicone sleeves buy two, one goes airbox to tube and one from intake to tube and paint it satin black or pouter coat. Let me know if you want me to take pictures of mine to help you ?
