mts Posted August 16, 2007 Report Share Posted August 16, 2007 The main purpose of that box is only to reduce the noise created by the intake valves, and in this case the S/C. It's second purpose to to create venturis for the lines that come in, this is very easily mimicked by having the tubes that are welded into the main 3" tube protrude inwards by maybe 1/2". This will enter into the air flow and then creates a small low pressure zone in the hole of the protruding tube thus a venturi is made. Link to comment Share on other sites More sharing options...
Graham Posted August 16, 2007 Report Share Posted August 16, 2007 I dont have enough experience to estimate the turbulence inside the resonator but i highly believe that mazda engineers designed it in a proper way. Not only air from filter but the other hoses will create turbulence! Absolutely correct, but their goals are not mine. I'm happy to sacrifice a bit of quietness and fuel economy at 2500rpm in exchange for more power and sometimes improved economy at 3,000rpm. Although, driving tonight with a couple of people in the car and being able to have a whispered conversation is truly amazing - my last car was a Diesel 4x4 and I had to have an amplifier + good head unit just to be able to hear the music. Maybe I'll keep Milly running the near silent way that Mazda built it. We'll have to wait and see what happens when I get some money G. Link to comment Share on other sites More sharing options...
mts Posted August 16, 2007 Report Share Posted August 16, 2007 I have enough stereo mask any noise outside.... Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 16, 2007 Report Share Posted August 16, 2007 The Xedos' ability to run quiet was regarded as one of its major assets when it was launched, easily outperforming both the BMW 523 and the Merc E230. All the way up to at least 180 km/h it is very silent. The noiselevel is indeed low, but our worse than bad tarmac lets it down compared to other countries smooth surfaced roads. I found that removing the intake tubing (with one resonator) inside the wheelwell didn't make it louder at all during regular driving. And there is another smaller resonator between the air mass sensor and the throttlebody, which I have not removed. Link to comment Share on other sites More sharing options...
///BHRpowered Posted August 17, 2007 Report Share Posted August 17, 2007 the millenia is quiet, but as I found at MWM07, driving long distances with a car with an excellent exhaust note, going on and on and on can sometimes be annoying if your trying to make a phone call or have a conversion with someone in the car. Now yes I could have slowed down to below 85 and kept the rpms lower, but that just wouldn't be any fun Link to comment Share on other sites More sharing options...
enginph Posted August 17, 2007 Report Share Posted August 17, 2007 A pillar noise is annoying.. Link to comment Share on other sites More sharing options...
///BHRpowered Posted August 17, 2007 Report Share Posted August 17, 2007 The more I think about it, the more I think that jk's intake for the 2.5 could be used if you just added the extra connections for the lines, it looks like it follows the same place and that the intake manifold is mounted in exactly the same place Link to comment Share on other sites More sharing options...
enginph Posted August 17, 2007 Report Share Posted August 17, 2007 How about putting some insulation around the intake? You know the engine bay and everything there is hot. Metal pipe is not a good idea in that respect... Link to comment Share on other sites More sharing options...
ChiTown Posted August 17, 2007 Report Share Posted August 17, 2007 The more I think about it, the more I think that jk's intake for the 2.5 could be used if you just added the extra connections for the lines, it looks like it follows the same place and that the intake manifold is mounted in exactly the same place the throttle body on the S is in the same location as the L but at a slightly different angle, with a 45 degree or hump hose connecting JK's and the throttle body it may work...with the added vacuum line nipples welded on of course... my CAI intake thread got pinned! sweet!! never had a post pinned before, thanx for all the interest guys! Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 17, 2007 Report Share Posted August 17, 2007 the millenia is quiet, but as I found at MWM07, driving long distances with a car with an excellent exhaust note, going on and on and on can sometimes be annoying if your trying to make a phone call or have a conversion with someone in the car. Now yes I could have slowed down to below 85 and kept the rpms lower, but that just wouldn't be any fun Downside of rice, in this case dual lemon launchers, you of all people should hardly be surprised... Link to comment Share on other sites More sharing options...
///BHRpowered Posted August 17, 2007 Report Share Posted August 17, 2007 are you calling my millenia rice? I said an excellent exhaust note, it doesn't matter if it was an enzo. Besides, a ricer can't even touch the speeds we were cruising at, the chevy might have been outraced, but gotto wasn't even in sight. intake wise...hmm, I'm not sure how much of a different angle, only one of jk's I ever saw installed was dons, looked close, would be easy to adjust it. Adding the extra connections is the hardest part, 6 now is it? Link to comment Share on other sites More sharing options...
ChiTown Posted August 17, 2007 Report Share Posted August 17, 2007 are you calling my millenia rice? I said an excellent exhaust note, it doesn't matter if it was an enzo. Besides, a ricer can't even touch the speeds we were cruising at, the chevy might have been outraced, but gotto wasn't even in sight. intake wise...hmm, I'm not sure how much of a different angle, only one of jk's I ever saw installed was dons, looked close, would be easy to adjust it. Adding the extra connections is the hardest part, 6 now is it? It was 5 or 6 vacuum lines. I wrote it down somewhere with the proper hose diameters of each, cant find my notes though... Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 17, 2007 Report Share Posted August 17, 2007 Your car has a rear airbrake and an aftermarket exhaust, neither too tasteful, in my opinion. So yes, I call it rice. But as you're well aware of, I'm an old man who likes cars the way the engineers intended them to be. I can have a normal conversation in 100 mph in my Xedos. The engine is actually unaudible at that speed, doing 4k rpm. I do have great respect for japanese automotive engineers Link to comment Share on other sites More sharing options...
///BHRpowered Posted August 17, 2007 Report Share Posted August 17, 2007 well since its a stock spoiler, you can't argue its not as the engieers didn't intend, and that aftermarket exhaust is just damn classy, the stock exhaust tips were 2 small and 2 far inward, even for 1993. chi, would there have to be custom piping with the connections welded on, or is there anyway to just drill holes and connect them in with a gasket, maybe like the way the temp sensor mounts now? Link to comment Share on other sites More sharing options...
ChiTown Posted August 18, 2007 Report Share Posted August 18, 2007 well since its a stock spoiler, you can't argue its not as the engieers didn't intend, and that aftermarket exhaust is just damn classy, the stock exhaust tips were 2 small and 2 far inward, even for 1993. chi, would there have to be custom piping with the connections welded on, or is there anyway to just drill holes and connect them in with a gasket, maybe like the way the temp sensor mounts now? welding inlets on would be ideal. just gaskets and hoses wouldnt hold unless the gasket has a way to secure the hose. maybe a metal connector at the tip of the hose that could be pushed inside the gasket (hopefully not too far because that would disturb airflow inside the pipe) I am still toying with ideas for this, my buddy can weld alum, i believe they call it sweating, just need to buy some small alum tube to cut and use as inlets. i may do a mockup with some plumbing style connectors that the hoses could attach to, they screw in and could be sealed with silicone. this would be a ghetto version prototype and be use to get the correct spots to add the inlets and make shure all the vacuum lines reach. Link to comment Share on other sites More sharing options...
///BHRpowered Posted August 18, 2007 Report Share Posted August 18, 2007 wouldn't be 2 hard to weld it all on, then just slip the hoses over, but the part would need to be sent somewhere to be polished or chromed or something, can't have bare metal and or non-cleaned up welds all over the place Link to comment Share on other sites More sharing options...
Jdubs99 Posted August 19, 2007 Author Report Share Posted August 19, 2007 Call it northern kentucky redneck ingenuity, but consider the other variables involved with the airbox. I look at in order of "what keeps the car we designed maintained, and our company out of TSBs and recalls". Priority 1- How long will take our mechanics in the states to change out the air filter and charge as much as we can for as little work as possible? I think that maybe harmonics were in mind with the air chamber attached to the TB. I don't think that was an isse after the ribbed rubber hose after that. Link to comment Share on other sites More sharing options...
///BHRpowered Posted August 19, 2007 Report Share Posted August 19, 2007 My issue is I don't think there would be much performance gain from adding this to the existing CAI setup, just sound Link to comment Share on other sites More sharing options...
mts Posted August 20, 2007 Report Share Posted August 20, 2007 There is going to minimal heat loss in the air, as the retention time in that box will be negligent, as for turbulence... well that will increase, and laminar flow is always better. But the visual appeal to a clean pipe would be the biggest gain, getting rid of that huge piece of plastic. Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 20, 2007 Report Share Posted August 20, 2007 What about that crappy engine cover of yours? Link to comment Share on other sites More sharing options...
mts Posted August 20, 2007 Report Share Posted August 20, 2007 Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 20, 2007 Report Share Posted August 20, 2007 Plastic too Link to comment Share on other sites More sharing options...
mts Posted August 20, 2007 Report Share Posted August 20, 2007 But necessary to hide the bag of snakes underneath.... that is referred to as the "don't touch cover"... LMAO Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 20, 2007 Report Share Posted August 20, 2007 I prefer the view of an all alloy engine... Hey, what about a 100 mm cable ladder and a bunch of zipties for your vacuum spaghetti? I'm sure you'd be able to hear your SC even better too Link to comment Share on other sites More sharing options...
mts Posted August 20, 2007 Report Share Posted August 20, 2007 NO... that cover advertises the Miller Link to comment Share on other sites More sharing options...
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